/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 11:32:24,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 11:32:24,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 11:32:24,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 11:32:24,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 11:32:24,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 11:32:24,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 11:32:24,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 11:32:24,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 11:32:24,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 11:32:24,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 11:32:24,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 11:32:24,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 11:32:24,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 11:32:24,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 11:32:24,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 11:32:24,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 11:32:24,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 11:32:24,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 11:32:24,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 11:32:24,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 11:32:24,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 11:32:24,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 11:32:24,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 11:32:24,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 11:32:24,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 11:32:24,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 11:32:24,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 11:32:24,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 11:32:24,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 11:32:24,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 11:32:24,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 11:32:24,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 11:32:24,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 11:32:24,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 11:32:24,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 11:32:24,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 11:32:24,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 11:32:24,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 11:32:24,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 11:32:24,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 11:32:24,805 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 [2021-01-20 11:32:24,861 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 11:32:24,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 11:32:24,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 11:32:24,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 11:32:24,867 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 11:32:24,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 11:32:24,867 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 11:32:24,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 11:32:24,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 11:32:24,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 11:32:24,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 11:32:24,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 11:32:24,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 11:32:24,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 11:32:24,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 11:32:24,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 11:32:24,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 11:32:24,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 11:32:24,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 11:32:24,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 11:32:24,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 11:32:24,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 11:32:24,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 11:32:24,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 11:32:24,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 11:32:24,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 11:32:24,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 11:32:24,875 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 11:32:24,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 11:32:24,876 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 11:32:24,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 11:32:25,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 11:32:25,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 11:32:25,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 11:32:25,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 11:32:25,335 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 11:32:25,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-01-20 11:32:25,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c7152fb/da706f2565c24574869109625b268834/FLAG88c30f2e3 [2021-01-20 11:32:26,167 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 11:32:26,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-01-20 11:32:26,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c7152fb/da706f2565c24574869109625b268834/FLAG88c30f2e3 [2021-01-20 11:32:26,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c7152fb/da706f2565c24574869109625b268834 [2021-01-20 11:32:26,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 11:32:26,425 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 11:32:26,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 11:32:26,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 11:32:26,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 11:32:26,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b36051a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:26, skipping insertion in model container [2021-01-20 11:32:26,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:32:26" (1/1) ... [2021-01-20 11:32:26,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 11:32:26,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 11:32:27,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 11:32:27,019 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 11:32:27,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 11:32:27,232 INFO L208 MainTranslator]: Completed translation [2021-01-20 11:32:27,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27 WrapperNode [2021-01-20 11:32:27,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 11:32:27,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 11:32:27,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 11:32:27,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 11:32:27,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 11:32:27,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 11:32:27,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 11:32:27,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 11:32:27,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (1/1) ... [2021-01-20 11:32:27,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 11:32:27,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 11:32:27,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 11:32:27,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 11:32:27,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (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 [2021-01-20 11:32:27,487 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 11:32:27,487 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 11:32:27,487 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 11:32:27,487 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 11:32:27,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 11:32:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 11:32:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 11:32:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 11:32:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 11:32:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 11:32:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 11:32:27,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 11:32:27,490 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-20 11:32:27,985 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 11:32:27,986 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 11:32:27,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:32:27 BoogieIcfgContainer [2021-01-20 11:32:27,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 11:32:27,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 11:32:27,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 11:32:27,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 11:32:27,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:32:26" (1/3) ... [2021-01-20 11:32:27,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fcf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:32:27, skipping insertion in model container [2021-01-20 11:32:27,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:32:27" (2/3) ... [2021-01-20 11:32:27,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fcf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:32:27, skipping insertion in model container [2021-01-20 11:32:27,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:32:27" (3/3) ... [2021-01-20 11:32:27,997 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2021-01-20 11:32:28,014 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 11:32:28,014 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 11:32:28,018 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 11:32:28,019 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 11:32:28,055 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,056 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,056 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,056 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,056 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,057 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,057 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,057 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,057 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,058 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,058 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,058 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,058 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,058 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,059 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,059 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,059 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,059 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,059 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,060 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,060 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,060 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,060 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,061 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,061 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,061 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,061 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,062 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,062 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,062 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,063 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,063 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,064 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,064 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,064 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,064 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,064 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,065 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,065 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,065 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,065 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,066 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,066 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,067 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,067 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,067 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,067 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,067 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,068 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,068 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,068 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,068 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,068 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,071 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,071 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,071 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,072 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,072 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,072 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,080 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,080 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,080 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,080 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 11:32:28,084 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 11:32:28,098 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 11:32:28,123 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 11:32:28,123 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 11:32:28,124 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 11:32:28,124 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 11:32:28,124 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 11:32:28,124 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 11:32:28,124 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 11:32:28,124 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 11:32:28,137 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-20 11:32:28,282 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 11:32:28,308 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:28,309 INFO L504 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] [2021-01-20 11:32:28,310 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:28,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:28,316 INFO L82 PathProgramCache]: Analyzing trace with hash 811106412, now seen corresponding path program 1 times [2021-01-20 11:32:28,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:28,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598940254] [2021-01-20 11:32:28,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:28,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598940254] [2021-01-20 11:32:28,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:28,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 11:32:28,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108062371] [2021-01-20 11:32:28,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 11:32:28,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:28,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 11:32:28,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 11:32:28,858 INFO L87 Difference]: Start difference. First operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:29,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:29,188 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-20 11:32:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 11:32:29,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-01-20 11:32:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:29,222 INFO L225 Difference]: With dead ends: 4034 [2021-01-20 11:32:29,222 INFO L226 Difference]: Without dead ends: 1472 [2021-01-20 11:32:29,224 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 11:32:29,224 INFO L78 Accepts]: Start accepts. Automaton has 1472 states. Word has length 28 [2021-01-20 11:32:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:29,226 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states. [2021-01-20 11:32:29,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states. [2021-01-20 11:32:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:29,235 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:29,235 INFO L504 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] [2021-01-20 11:32:29,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 11:32:29,236 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:29,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2008820546, now seen corresponding path program 1 times [2021-01-20 11:32:29,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:29,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975370670] [2021-01-20 11:32:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:29,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975370670] [2021-01-20 11:32:29,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:29,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:29,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981840313] [2021-01-20 11:32:29,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:29,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:29,488 INFO L87 Difference]: Start difference. First operand 1472 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:29,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:29,800 INFO L93 Difference]: Finished difference Result 1984 states and 5365 transitions. [2021-01-20 11:32:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 11:32:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:29,816 INFO L225 Difference]: With dead ends: 1984 [2021-01-20 11:32:29,817 INFO L226 Difference]: Without dead ends: 1726 [2021-01-20 11:32:29,817 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:29,818 INFO L78 Accepts]: Start accepts. Automaton has 1726 states. Word has length 33 [2021-01-20 11:32:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:29,818 INFO L481 AbstractCegarLoop]: Abstraction has 1726 states. [2021-01-20 11:32:29,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states. [2021-01-20 11:32:29,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:29,824 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:29,824 INFO L504 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] [2021-01-20 11:32:29,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 11:32:29,825 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:29,827 INFO L82 PathProgramCache]: Analyzing trace with hash 103991554, now seen corresponding path program 1 times [2021-01-20 11:32:29,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:29,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191722928] [2021-01-20 11:32:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:30,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191722928] [2021-01-20 11:32:30,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:30,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:30,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694761911] [2021-01-20 11:32:30,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:30,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:30,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:30,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:30,058 INFO L87 Difference]: Start difference. First operand 1726 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:30,252 INFO L93 Difference]: Finished difference Result 2110 states and 5584 transitions. [2021-01-20 11:32:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 11:32:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:30,266 INFO L225 Difference]: With dead ends: 2110 [2021-01-20 11:32:30,266 INFO L226 Difference]: Without dead ends: 1806 [2021-01-20 11:32:30,267 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:30,267 INFO L78 Accepts]: Start accepts. Automaton has 1806 states. Word has length 33 [2021-01-20 11:32:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:30,268 INFO L481 AbstractCegarLoop]: Abstraction has 1806 states. [2021-01-20 11:32:30,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states. [2021-01-20 11:32:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 11:32:30,271 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:30,271 INFO L504 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] [2021-01-20 11:32:30,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 11:32:30,272 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:30,273 INFO L82 PathProgramCache]: Analyzing trace with hash -899974956, now seen corresponding path program 2 times [2021-01-20 11:32:30,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:30,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880095269] [2021-01-20 11:32:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:30,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880095269] [2021-01-20 11:32:30,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:30,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 11:32:30,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27880861] [2021-01-20 11:32:30,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 11:32:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:30,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 11:32:30,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-20 11:32:30,534 INFO L87 Difference]: Start difference. First operand 1806 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:30,802 INFO L93 Difference]: Finished difference Result 2318 states and 6128 transitions. [2021-01-20 11:32:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 11:32:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 11:32:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:30,820 INFO L225 Difference]: With dead ends: 2318 [2021-01-20 11:32:30,820 INFO L226 Difference]: Without dead ends: 1996 [2021-01-20 11:32:30,820 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:32:30,821 INFO L78 Accepts]: Start accepts. Automaton has 1996 states. Word has length 33 [2021-01-20 11:32:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:30,822 INFO L481 AbstractCegarLoop]: Abstraction has 1996 states. [2021-01-20 11:32:30,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states. [2021-01-20 11:32:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:30,828 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:30,828 INFO L504 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] [2021-01-20 11:32:30,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 11:32:30,828 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:30,831 INFO L82 PathProgramCache]: Analyzing trace with hash -421493469, now seen corresponding path program 1 times [2021-01-20 11:32:30,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:30,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279259014] [2021-01-20 11:32:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:31,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279259014] [2021-01-20 11:32:31,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925894732] [2021-01-20 11:32:31,131 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 [2021-01-20 11:32:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 11:32:31,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:31,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:31,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:31,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:31,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-20 11:32:31,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597658172] [2021-01-20 11:32:31,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 11:32:31,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:31,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 11:32:31,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-20 11:32:31,518 INFO L87 Difference]: Start difference. First operand 1996 states. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:31,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:31,876 INFO L93 Difference]: Finished difference Result 2908 states and 7595 transitions. [2021-01-20 11:32:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-20 11:32:31,877 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:31,898 INFO L225 Difference]: With dead ends: 2908 [2021-01-20 11:32:31,898 INFO L226 Difference]: Without dead ends: 2544 [2021-01-20 11:32:31,900 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:32:31,900 INFO L78 Accepts]: Start accepts. Automaton has 2544 states. Word has length 38 [2021-01-20 11:32:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:31,901 INFO L481 AbstractCegarLoop]: Abstraction has 2544 states. [2021-01-20 11:32:31,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states. [2021-01-20 11:32:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:31,905 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:31,905 INFO L504 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] [2021-01-20 11:32:32,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:32,121 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:32,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:32,122 INFO L82 PathProgramCache]: Analyzing trace with hash -869705744, now seen corresponding path program 1 times [2021-01-20 11:32:32,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:32,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691004012] [2021-01-20 11:32:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:32,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691004012] [2021-01-20 11:32:32,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:32,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:32,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291440232] [2021-01-20 11:32:32,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:32,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:32,282 INFO L87 Difference]: Start difference. First operand 2544 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:32,415 INFO L93 Difference]: Finished difference Result 2736 states and 7057 transitions. [2021-01-20 11:32:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 11:32:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:32,433 INFO L225 Difference]: With dead ends: 2736 [2021-01-20 11:32:32,433 INFO L226 Difference]: Without dead ends: 2584 [2021-01-20 11:32:32,434 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-20 11:32:32,434 INFO L78 Accepts]: Start accepts. Automaton has 2584 states. Word has length 38 [2021-01-20 11:32:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:32,435 INFO L481 AbstractCegarLoop]: Abstraction has 2584 states. [2021-01-20 11:32:32,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states. [2021-01-20 11:32:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:32,439 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:32,439 INFO L504 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] [2021-01-20 11:32:32,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 11:32:32,440 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:32,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1873672254, now seen corresponding path program 2 times [2021-01-20 11:32:32,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:32,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100405965] [2021-01-20 11:32:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:32,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100405965] [2021-01-20 11:32:32,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:32,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:32,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708430356] [2021-01-20 11:32:32,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:32,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:32,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:32,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:32,707 INFO L87 Difference]: Start difference. First operand 2584 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:32,931 INFO L93 Difference]: Finished difference Result 3152 states and 8081 transitions. [2021-01-20 11:32:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 11:32:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:32,954 INFO L225 Difference]: With dead ends: 3152 [2021-01-20 11:32:32,955 INFO L226 Difference]: Without dead ends: 2894 [2021-01-20 11:32:32,955 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-01-20 11:32:32,955 INFO L78 Accepts]: Start accepts. Automaton has 2894 states. Word has length 38 [2021-01-20 11:32:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:32,956 INFO L481 AbstractCegarLoop]: Abstraction has 2894 states. [2021-01-20 11:32:32,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states. [2021-01-20 11:32:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 11:32:32,962 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:32,963 INFO L504 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] [2021-01-20 11:32:32,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-20 11:32:32,964 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:32,964 INFO L82 PathProgramCache]: Analyzing trace with hash 587213024, now seen corresponding path program 3 times [2021-01-20 11:32:32,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:32,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480029708] [2021-01-20 11:32:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:33,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480029708] [2021-01-20 11:32:33,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 11:32:33,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 11:32:33,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085766952] [2021-01-20 11:32:33,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 11:32:33,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:33,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 11:32:33,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-20 11:32:33,136 INFO L87 Difference]: Start difference. First operand 2894 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:33,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:33,411 INFO L93 Difference]: Finished difference Result 3742 states and 9548 transitions. [2021-01-20 11:32:33,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:32:33,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 11:32:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:33,433 INFO L225 Difference]: With dead ends: 3742 [2021-01-20 11:32:33,434 INFO L226 Difference]: Without dead ends: 3314 [2021-01-20 11:32:33,434 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:33,435 INFO L78 Accepts]: Start accepts. Automaton has 3314 states. Word has length 38 [2021-01-20 11:32:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:33,435 INFO L481 AbstractCegarLoop]: Abstraction has 3314 states. [2021-01-20 11:32:33,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3314 states. [2021-01-20 11:32:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:33,441 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:33,442 INFO L504 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] [2021-01-20 11:32:33,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-20 11:32:33,442 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:33,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:33,443 INFO L82 PathProgramCache]: Analyzing trace with hash 810819243, now seen corresponding path program 1 times [2021-01-20 11:32:33,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:33,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125945010] [2021-01-20 11:32:33,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:33,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125945010] [2021-01-20 11:32:33,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659181672] [2021-01-20 11:32:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-20 11:32:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:33,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:33,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:33,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:33,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:33,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:33,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135989862] [2021-01-20 11:32:33,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:33,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:33,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:33,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:33,847 INFO L87 Difference]: Start difference. First operand 3314 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:34,024 INFO L93 Difference]: Finished difference Result 3506 states and 8882 transitions. [2021-01-20 11:32:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 11:32:34,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:34,035 INFO L225 Difference]: With dead ends: 3506 [2021-01-20 11:32:34,035 INFO L226 Difference]: Without dead ends: 3354 [2021-01-20 11:32:34,036 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:34,036 INFO L78 Accepts]: Start accepts. Automaton has 3354 states. Word has length 43 [2021-01-20 11:32:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:34,037 INFO L481 AbstractCegarLoop]: Abstraction has 3354 states. [2021-01-20 11:32:34,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states. [2021-01-20 11:32:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:34,043 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:34,043 INFO L504 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] [2021-01-20 11:32:34,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:34,257 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:34,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:34,258 INFO L82 PathProgramCache]: Analyzing trace with hash -193147267, now seen corresponding path program 2 times [2021-01-20 11:32:34,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:34,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295602365] [2021-01-20 11:32:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:34,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295602365] [2021-01-20 11:32:34,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630849400] [2021-01-20 11:32:34,451 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 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 [2021-01-20 11:32:34,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:34,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:34,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:34,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:34,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:34,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:34,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-01-20 11:32:34,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081648103] [2021-01-20 11:32:34,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 11:32:34,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:34,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 11:32:34,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:32:34,621 INFO L87 Difference]: Start difference. First operand 3354 states. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:35,042 INFO L93 Difference]: Finished difference Result 4258 states and 10770 transitions. [2021-01-20 11:32:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:32:35,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:35,055 INFO L225 Difference]: With dead ends: 4258 [2021-01-20 11:32:35,055 INFO L226 Difference]: Without dead ends: 3894 [2021-01-20 11:32:35,056 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-01-20 11:32:35,056 INFO L78 Accepts]: Start accepts. Automaton has 3894 states. Word has length 43 [2021-01-20 11:32:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:35,056 INFO L481 AbstractCegarLoop]: Abstraction has 3894 states. [2021-01-20 11:32:35,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states. [2021-01-20 11:32:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:35,064 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:35,064 INFO L504 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] [2021-01-20 11:32:35,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-20 11:32:35,278 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:35,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322251, now seen corresponding path program 1 times [2021-01-20 11:32:35,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:35,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332144038] [2021-01-20 11:32:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:35,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332144038] [2021-01-20 11:32:35,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344918164] [2021-01-20 11:32:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:35,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:35,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:35,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:35,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:35,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005446967] [2021-01-20 11:32:35,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:35,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:35,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:35,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:35,619 INFO L87 Difference]: Start difference. First operand 3894 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:36,002 INFO L93 Difference]: Finished difference Result 4518 states and 11160 transitions. [2021-01-20 11:32:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 11:32:36,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:36,014 INFO L225 Difference]: With dead ends: 4518 [2021-01-20 11:32:36,014 INFO L226 Difference]: Without dead ends: 4214 [2021-01-20 11:32:36,015 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:32:36,015 INFO L78 Accepts]: Start accepts. Automaton has 4214 states. Word has length 43 [2021-01-20 11:32:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:36,015 INFO L481 AbstractCegarLoop]: Abstraction has 4214 states. [2021-01-20 11:32:36,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4214 states. [2021-01-20 11:32:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:36,022 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:36,022 INFO L504 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] [2021-01-20 11:32:36,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:36,236 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:36,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1853174015, now seen corresponding path program 2 times [2021-01-20 11:32:36,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:36,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530135936] [2021-01-20 11:32:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:36,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530135936] [2021-01-20 11:32:36,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050739783] [2021-01-20 11:32:36,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 11:32:36,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:36,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:36,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:36,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:36,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:36,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:36,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870244192] [2021-01-20 11:32:36,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:36,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:36,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:36,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:36,645 INFO L87 Difference]: Start difference. First operand 4214 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:37,185 INFO L93 Difference]: Finished difference Result 4638 states and 11400 transitions. [2021-01-20 11:32:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:32:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:37,200 INFO L225 Difference]: With dead ends: 4638 [2021-01-20 11:32:37,200 INFO L226 Difference]: Without dead ends: 4334 [2021-01-20 11:32:37,201 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-01-20 11:32:37,201 INFO L78 Accepts]: Start accepts. Automaton has 4334 states. Word has length 43 [2021-01-20 11:32:37,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:37,202 INFO L481 AbstractCegarLoop]: Abstraction has 4334 states. [2021-01-20 11:32:37,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4334 states. [2021-01-20 11:32:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 11:32:37,209 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:37,209 INFO L504 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] [2021-01-20 11:32:37,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-20 11:32:37,424 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:37,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:37,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2013675815, now seen corresponding path program 3 times [2021-01-20 11:32:37,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:37,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147232286] [2021-01-20 11:32:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:37,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147232286] [2021-01-20 11:32:37,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787664954] [2021-01-20 11:32:37,608 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 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 [2021-01-20 11:32:37,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:32:37,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:37,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 11:32:37,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:37,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:37,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:37,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:37,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 11:32:37,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947225138] [2021-01-20 11:32:37,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:37,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:37,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:37,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:37,793 INFO L87 Difference]: Start difference. First operand 4334 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:38,694 INFO L93 Difference]: Finished difference Result 6124 states and 15171 transitions. [2021-01-20 11:32:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:32:38,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 11:32:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:38,732 INFO L225 Difference]: With dead ends: 6124 [2021-01-20 11:32:38,732 INFO L226 Difference]: Without dead ends: 5484 [2021-01-20 11:32:38,733 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:32:38,733 INFO L78 Accepts]: Start accepts. Automaton has 5484 states. Word has length 43 [2021-01-20 11:32:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:38,733 INFO L481 AbstractCegarLoop]: Abstraction has 5484 states. [2021-01-20 11:32:38,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states. [2021-01-20 11:32:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:38,746 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:38,747 INFO L504 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] [2021-01-20 11:32:38,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:38,963 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:38,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:38,963 INFO L82 PathProgramCache]: Analyzing trace with hash 264667651, now seen corresponding path program 2 times [2021-01-20 11:32:38,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:38,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632990443] [2021-01-20 11:32:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:39,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632990443] [2021-01-20 11:32:39,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214186905] [2021-01-20 11:32:39,143 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 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 [2021-01-20 11:32:39,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:39,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:39,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:39,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:39,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:39,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:39,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:39,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:39,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627057634] [2021-01-20 11:32:39,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:39,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:39,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:39,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:39,430 INFO L87 Difference]: Start difference. First operand 5484 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:39,776 INFO L93 Difference]: Finished difference Result 6556 states and 16031 transitions. [2021-01-20 11:32:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-20 11:32:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 48 [2021-01-20 11:32:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:39,792 INFO L225 Difference]: With dead ends: 6556 [2021-01-20 11:32:39,792 INFO L226 Difference]: Without dead ends: 6192 [2021-01-20 11:32:39,793 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-01-20 11:32:39,793 INFO L78 Accepts]: Start accepts. Automaton has 6192 states. Word has length 48 [2021-01-20 11:32:39,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:39,793 INFO L481 AbstractCegarLoop]: Abstraction has 6192 states. [2021-01-20 11:32:39,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states. [2021-01-20 11:32:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:39,804 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:39,804 INFO L504 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] [2021-01-20 11:32:40,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 11:32:40,017 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:40,019 INFO L82 PathProgramCache]: Analyzing trace with hash -183544624, now seen corresponding path program 3 times [2021-01-20 11:32:40,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:40,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802133773] [2021-01-20 11:32:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:40,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802133773] [2021-01-20 11:32:40,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963620379] [2021-01-20 11:32:40,160 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 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 [2021-01-20 11:32:40,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:32:40,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:32:40,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:40,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:40,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:40,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 11:32:40,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848358958] [2021-01-20 11:32:40,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 11:32:40,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:40,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 11:32:40,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-01-20 11:32:40,340 INFO L87 Difference]: Start difference. First operand 6192 states. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:40,566 INFO L93 Difference]: Finished difference Result 6384 states and 15493 transitions. [2021-01-20 11:32:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 11:32:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:40,581 INFO L225 Difference]: With dead ends: 6384 [2021-01-20 11:32:40,582 INFO L226 Difference]: Without dead ends: 6232 [2021-01-20 11:32:40,582 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:40,582 INFO L78 Accepts]: Start accepts. Automaton has 6232 states. Word has length 48 [2021-01-20 11:32:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:40,583 INFO L481 AbstractCegarLoop]: Abstraction has 6232 states. [2021-01-20 11:32:40,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states. [2021-01-20 11:32:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:40,592 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:40,592 INFO L504 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] [2021-01-20 11:32:40,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 11:32:40,808 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:40,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:40,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1187511134, now seen corresponding path program 4 times [2021-01-20 11:32:40,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:40,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439098068] [2021-01-20 11:32:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:40,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439098068] [2021-01-20 11:32:40,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882016442] [2021-01-20 11:32:40,984 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 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 [2021-01-20 11:32:41,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:41,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:41,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:41,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:41,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:41,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:41,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:41,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:41,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772800251] [2021-01-20 11:32:41,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:41,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:41,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:41,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:41,259 INFO L87 Difference]: Start difference. First operand 6232 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:41,872 INFO L93 Difference]: Finished difference Result 7286 states and 17776 transitions. [2021-01-20 11:32:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:32:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:41,885 INFO L225 Difference]: With dead ends: 7286 [2021-01-20 11:32:41,885 INFO L226 Difference]: Without dead ends: 6922 [2021-01-20 11:32:41,886 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:32:41,886 INFO L78 Accepts]: Start accepts. Automaton has 6922 states. Word has length 48 [2021-01-20 11:32:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:41,886 INFO L481 AbstractCegarLoop]: Abstraction has 6922 states. [2021-01-20 11:32:41,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 6922 states. [2021-01-20 11:32:41,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:41,897 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:41,897 INFO L504 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] [2021-01-20 11:32:42,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 11:32:42,110 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1211281178, now seen corresponding path program 1 times [2021-01-20 11:32:42,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:42,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993718073] [2021-01-20 11:32:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:42,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993718073] [2021-01-20 11:32:42,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239706328] [2021-01-20 11:32:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-20 11:32:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:42,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:42,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:42,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:42,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:42,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:42,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333697777] [2021-01-20 11:32:42,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:42,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:42,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:42,515 INFO L87 Difference]: Start difference. First operand 6922 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:42,971 INFO L93 Difference]: Finished difference Result 7234 states and 17478 transitions. [2021-01-20 11:32:42,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:32:42,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:42,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:42,982 INFO L225 Difference]: With dead ends: 7234 [2021-01-20 11:32:42,982 INFO L226 Difference]: Without dead ends: 7082 [2021-01-20 11:32:42,983 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-01-20 11:32:42,983 INFO L78 Accepts]: Start accepts. Automaton has 7082 states. Word has length 48 [2021-01-20 11:32:42,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:42,983 INFO L481 AbstractCegarLoop]: Abstraction has 7082 states. [2021-01-20 11:32:42,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 7082 states. [2021-01-20 11:32:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:42,994 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:42,994 INFO L504 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] [2021-01-20 11:32:43,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 11:32:43,210 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:43,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:43,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1447429414, now seen corresponding path program 2 times [2021-01-20 11:32:43,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:43,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934851051] [2021-01-20 11:32:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:43,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934851051] [2021-01-20 11:32:43,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128926315] [2021-01-20 11:32:43,401 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 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 [2021-01-20 11:32:43,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:43,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:43,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:43,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:43,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:43,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:43,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:43,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933909564] [2021-01-20 11:32:43,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:43,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:43,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:43,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:43,716 INFO L87 Difference]: Start difference. First operand 7082 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:44,164 INFO L93 Difference]: Finished difference Result 7314 states and 17638 transitions. [2021-01-20 11:32:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:32:44,164 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:44,175 INFO L225 Difference]: With dead ends: 7314 [2021-01-20 11:32:44,175 INFO L226 Difference]: Without dead ends: 7162 [2021-01-20 11:32:44,176 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:32:44,176 INFO L78 Accepts]: Start accepts. Automaton has 7162 states. Word has length 48 [2021-01-20 11:32:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:44,177 INFO L481 AbstractCegarLoop]: Abstraction has 7162 states. [2021-01-20 11:32:44,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states. [2021-01-20 11:32:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:44,187 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:44,188 INFO L504 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] [2021-01-20 11:32:44,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 11:32:44,402 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:44,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1019311948, now seen corresponding path program 3 times [2021-01-20 11:32:44,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:44,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833026100] [2021-01-20 11:32:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:44,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833026100] [2021-01-20 11:32:44,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898641611] [2021-01-20 11:32:44,580 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 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 [2021-01-20 11:32:44,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:32:44,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:44,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:44,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:44,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:44,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:44,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:44,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:45,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:45,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:45,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903206327] [2021-01-20 11:32:45,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:45,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:45,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:45,013 INFO L87 Difference]: Start difference. First operand 7162 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:46,233 INFO L93 Difference]: Finished difference Result 9524 states and 22919 transitions. [2021-01-20 11:32:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:32:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 48 [2021-01-20 11:32:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:46,245 INFO L225 Difference]: With dead ends: 9524 [2021-01-20 11:32:46,245 INFO L226 Difference]: Without dead ends: 8832 [2021-01-20 11:32:46,246 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=1727, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:32:46,246 INFO L78 Accepts]: Start accepts. Automaton has 8832 states. Word has length 48 [2021-01-20 11:32:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:46,247 INFO L481 AbstractCegarLoop]: Abstraction has 8832 states. [2021-01-20 11:32:46,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states. [2021-01-20 11:32:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:46,257 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:46,258 INFO L504 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] [2021-01-20 11:32:46,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:46,474 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash 310617624, now seen corresponding path program 4 times [2021-01-20 11:32:46,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:46,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513040807] [2021-01-20 11:32:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:46,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513040807] [2021-01-20 11:32:46,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807449370] [2021-01-20 11:32:46,626 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 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 [2021-01-20 11:32:46,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:46,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:46,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:46,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:46,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:46,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:46,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:46,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382387304] [2021-01-20 11:32:46,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:46,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:46,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:46,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:46,825 INFO L87 Difference]: Start difference. First operand 8832 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:47,313 INFO L93 Difference]: Finished difference Result 9424 states and 22333 transitions. [2021-01-20 11:32:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:32:47,314 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:47,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:47,327 INFO L225 Difference]: With dead ends: 9424 [2021-01-20 11:32:47,328 INFO L226 Difference]: Without dead ends: 9272 [2021-01-20 11:32:47,328 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-01-20 11:32:47,329 INFO L78 Accepts]: Start accepts. Automaton has 9272 states. Word has length 48 [2021-01-20 11:32:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:47,330 INFO L481 AbstractCegarLoop]: Abstraction has 9272 states. [2021-01-20 11:32:47,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states. [2021-01-20 11:32:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:47,345 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:47,345 INFO L504 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] [2021-01-20 11:32:47,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-20 11:32:47,559 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:47,560 INFO L82 PathProgramCache]: Analyzing trace with hash -958721652, now seen corresponding path program 5 times [2021-01-20 11:32:47,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:47,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282883951] [2021-01-20 11:32:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:47,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282883951] [2021-01-20 11:32:47,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207297750] [2021-01-20 11:32:47,728 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 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 [2021-01-20 11:32:47,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:47,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:47,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:47,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:47,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:47,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:47,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270779002] [2021-01-20 11:32:47,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:47,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:47,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:47,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:47,962 INFO L87 Difference]: Start difference. First operand 9272 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:48,583 INFO L93 Difference]: Finished difference Result 9864 states and 23213 transitions. [2021-01-20 11:32:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:32:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:48,602 INFO L225 Difference]: With dead ends: 9864 [2021-01-20 11:32:48,602 INFO L226 Difference]: Without dead ends: 9712 [2021-01-20 11:32:48,603 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:32:48,603 INFO L78 Accepts]: Start accepts. Automaton has 9712 states. Word has length 48 [2021-01-20 11:32:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:48,603 INFO L481 AbstractCegarLoop]: Abstraction has 9712 states. [2021-01-20 11:32:48,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 9712 states. [2021-01-20 11:32:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:48,614 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:48,614 INFO L504 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] [2021-01-20 11:32:48,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:48,828 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:48,828 INFO L82 PathProgramCache]: Analyzing trace with hash 763359212, now seen corresponding path program 6 times [2021-01-20 11:32:48,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:48,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785995292] [2021-01-20 11:32:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:48,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785995292] [2021-01-20 11:32:48,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5496527] [2021-01-20 11:32:48,951 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 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 [2021-01-20 11:32:49,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 11:32:49,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:49,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:49,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:49,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:49,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:49,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 11:32:49,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186707929] [2021-01-20 11:32:49,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:49,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:49,155 INFO L87 Difference]: Start difference. First operand 9712 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:49,822 INFO L93 Difference]: Finished difference Result 10144 states and 23773 transitions. [2021-01-20 11:32:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:32:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-20 11:32:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:49,834 INFO L225 Difference]: With dead ends: 10144 [2021-01-20 11:32:49,834 INFO L226 Difference]: Without dead ends: 9992 [2021-01-20 11:32:49,834 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:32:49,834 INFO L78 Accepts]: Start accepts. Automaton has 9992 states. Word has length 48 [2021-01-20 11:32:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:49,835 INFO L481 AbstractCegarLoop]: Abstraction has 9992 states. [2021-01-20 11:32:49,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states. [2021-01-20 11:32:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 11:32:49,843 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:49,843 INFO L504 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] [2021-01-20 11:32:50,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-20 11:32:50,050 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:50,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:50,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1519359984, now seen corresponding path program 7 times [2021-01-20 11:32:50,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:50,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753741866] [2021-01-20 11:32:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:50,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753741866] [2021-01-20 11:32:50,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694521283] [2021-01-20 11:32:50,282 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 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 [2021-01-20 11:32:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:50,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 11:32:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:50,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:50,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:50,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:50,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 11:32:50,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269824158] [2021-01-20 11:32:50,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 11:32:50,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:50,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 11:32:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-20 11:32:50,497 INFO L87 Difference]: Start difference. First operand 9992 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:51,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:51,872 INFO L93 Difference]: Finished difference Result 12930 states and 30398 transitions. [2021-01-20 11:32:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 11:32:51,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 48 [2021-01-20 11:32:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:51,887 INFO L225 Difference]: With dead ends: 12930 [2021-01-20 11:32:51,887 INFO L226 Difference]: Without dead ends: 12132 [2021-01-20 11:32:51,888 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=598, Invalid=2264, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 11:32:51,888 INFO L78 Accepts]: Start accepts. Automaton has 12132 states. Word has length 48 [2021-01-20 11:32:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:51,889 INFO L481 AbstractCegarLoop]: Abstraction has 12132 states. [2021-01-20 11:32:51,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 11:32:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 12132 states. [2021-01-20 11:32:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:51,903 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:51,903 INFO L504 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] [2021-01-20 11:32:52,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:32:52,114 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:52,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1376333259, now seen corresponding path program 5 times [2021-01-20 11:32:52,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:52,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917838451] [2021-01-20 11:32:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:52,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917838451] [2021-01-20 11:32:52,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665064605] [2021-01-20 11:32:52,308 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 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 [2021-01-20 11:32:52,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:32:52,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:52,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:52,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:52,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:52,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:32:52,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107479491] [2021-01-20 11:32:52,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:32:52,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:52,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:32:52,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:52,563 INFO L87 Difference]: Start difference. First operand 12132 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:32:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:52,856 INFO L93 Difference]: Finished difference Result 12324 states and 28703 transitions. [2021-01-20 11:32:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 11:32:52,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:32:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:52,954 INFO L225 Difference]: With dead ends: 12324 [2021-01-20 11:32:52,954 INFO L226 Difference]: Without dead ends: 12172 [2021-01-20 11:32:52,955 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-01-20 11:32:52,955 INFO L78 Accepts]: Start accepts. Automaton has 12172 states. Word has length 53 [2021-01-20 11:32:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:52,955 INFO L481 AbstractCegarLoop]: Abstraction has 12172 states. [2021-01-20 11:32:52,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:32:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 12172 states. [2021-01-20 11:32:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:52,963 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:52,963 INFO L504 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] [2021-01-20 11:32:53,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 11:32:53,164 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:53,165 INFO L82 PathProgramCache]: Analyzing trace with hash 372366749, now seen corresponding path program 6 times [2021-01-20 11:32:53,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:53,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816004033] [2021-01-20 11:32:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:53,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816004033] [2021-01-20 11:32:53,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369866399] [2021-01-20 11:32:53,313 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 [2021-01-20 11:32:53,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 11:32:53,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:53,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:32:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:53,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:53,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:53,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-01-20 11:32:53,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652546730] [2021-01-20 11:32:53,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 11:32:53,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 11:32:53,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-20 11:32:53,458 INFO L87 Difference]: Start difference. First operand 12172 states. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:53,975 INFO L93 Difference]: Finished difference Result 12956 states and 30351 transitions. [2021-01-20 11:32:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 11:32:53,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:53,990 INFO L225 Difference]: With dead ends: 12956 [2021-01-20 11:32:53,991 INFO L226 Difference]: Without dead ends: 12592 [2021-01-20 11:32:53,991 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:32:53,991 INFO L78 Accepts]: Start accepts. Automaton has 12592 states. Word has length 53 [2021-01-20 11:32:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:53,991 INFO L481 AbstractCegarLoop]: Abstraction has 12592 states. [2021-01-20 11:32:53,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 12592 states. [2021-01-20 11:32:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:54,002 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:54,003 INFO L504 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] [2021-01-20 11:32:54,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 11:32:54,211 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:54,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:54,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1523808235, now seen corresponding path program 8 times [2021-01-20 11:32:54,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:54,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180987174] [2021-01-20 11:32:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:54,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180987174] [2021-01-20 11:32:54,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902285270] [2021-01-20 11:32:54,363 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 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 [2021-01-20 11:32:54,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:32:54,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:54,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:54,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:54,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:54,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:54,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:32:54,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609580713] [2021-01-20 11:32:54,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:32:54,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:54,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:32:54,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:54,643 INFO L87 Difference]: Start difference. First operand 12592 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:32:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:55,117 INFO L93 Difference]: Finished difference Result 12904 states and 30053 transitions. [2021-01-20 11:32:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:32:55,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:32:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:55,136 INFO L225 Difference]: With dead ends: 12904 [2021-01-20 11:32:55,136 INFO L226 Difference]: Without dead ends: 12752 [2021-01-20 11:32:55,136 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-01-20 11:32:55,136 INFO L78 Accepts]: Start accepts. Automaton has 12752 states. Word has length 53 [2021-01-20 11:32:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:55,137 INFO L481 AbstractCegarLoop]: Abstraction has 12752 states. [2021-01-20 11:32:55,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:32:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states. [2021-01-20 11:32:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:55,151 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:55,151 INFO L504 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] [2021-01-20 11:32:55,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 11:32:55,366 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:55,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1287659999, now seen corresponding path program 9 times [2021-01-20 11:32:55,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:55,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018266759] [2021-01-20 11:32:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:55,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018266759] [2021-01-20 11:32:55,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494977536] [2021-01-20 11:32:55,516 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 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 [2021-01-20 11:32:55,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:32:55,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:55,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:32:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:55,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:55,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:55,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:55,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-20 11:32:55,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354098320] [2021-01-20 11:32:55,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:32:55,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:32:55,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:32:55,856 INFO L87 Difference]: Start difference. First operand 12752 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:56,403 INFO L93 Difference]: Finished difference Result 13344 states and 30933 transitions. [2021-01-20 11:32:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:32:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 11:32:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:56,418 INFO L225 Difference]: With dead ends: 13344 [2021-01-20 11:32:56,418 INFO L226 Difference]: Without dead ends: 13192 [2021-01-20 11:32:56,419 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2021-01-20 11:32:56,419 INFO L78 Accepts]: Start accepts. Automaton has 13192 states. Word has length 53 [2021-01-20 11:32:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:56,419 INFO L481 AbstractCegarLoop]: Abstraction has 13192 states. [2021-01-20 11:32:56,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:32:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 13192 states. [2021-01-20 11:32:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:56,431 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:56,432 INFO L504 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] [2021-01-20 11:32:56,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 11:32:56,647 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1715777465, now seen corresponding path program 10 times [2021-01-20 11:32:56,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:56,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652246849] [2021-01-20 11:32:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:56,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652246849] [2021-01-20 11:32:56,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620439488] [2021-01-20 11:32:56,808 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 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 [2021-01-20 11:32:56,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:32:56,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:32:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:57,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:32:57,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:57,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:57,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:32:57,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309501014] [2021-01-20 11:32:57,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:32:57,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:57,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:32:57,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:57,139 INFO L87 Difference]: Start difference. First operand 13192 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:32:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:58,170 INFO L93 Difference]: Finished difference Result 14786 states and 34486 transitions. [2021-01-20 11:32:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:32:58,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:32:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:58,186 INFO L225 Difference]: With dead ends: 14786 [2021-01-20 11:32:58,186 INFO L226 Difference]: Without dead ends: 14422 [2021-01-20 11:32:58,187 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:32:58,187 INFO L78 Accepts]: Start accepts. Automaton has 14422 states. Word has length 53 [2021-01-20 11:32:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:58,187 INFO L481 AbstractCegarLoop]: Abstraction has 14422 states. [2021-01-20 11:32:58,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:32:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states. [2021-01-20 11:32:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:58,305 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:58,305 INFO L504 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] [2021-01-20 11:32:58,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-20 11:32:58,520 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:32:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:32:58,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1870495507, now seen corresponding path program 11 times [2021-01-20 11:32:58,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:32:58,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022318421] [2021-01-20 11:32:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:32:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:32:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:58,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022318421] [2021-01-20 11:32:58,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263716280] [2021-01-20 11:32:58,685 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 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 [2021-01-20 11:32:58,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:32:58,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:32:58,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:32:58,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:32:59,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:32:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:32:59,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:32:59,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:32:59,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797142734] [2021-01-20 11:32:59,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:32:59,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:32:59,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:32:59,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:32:59,048 INFO L87 Difference]: Start difference. First operand 14422 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:32:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:32:59,763 INFO L93 Difference]: Finished difference Result 15094 states and 34908 transitions. [2021-01-20 11:32:59,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:32:59,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:32:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:32:59,785 INFO L225 Difference]: With dead ends: 15094 [2021-01-20 11:32:59,785 INFO L226 Difference]: Without dead ends: 14942 [2021-01-20 11:32:59,786 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:32:59,786 INFO L78 Accepts]: Start accepts. Automaton has 14942 states. Word has length 53 [2021-01-20 11:32:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:32:59,786 INFO L481 AbstractCegarLoop]: Abstraction has 14942 states. [2021-01-20 11:32:59,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:32:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 14942 states. [2021-01-20 11:32:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:32:59,801 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:32:59,801 INFO L504 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] [2021-01-20 11:33:00,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:00,002 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash 601156231, now seen corresponding path program 12 times [2021-01-20 11:33:00,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:00,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097863968] [2021-01-20 11:33:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:00,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097863968] [2021-01-20 11:33:00,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728225987] [2021-01-20 11:33:00,175 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 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 [2021-01-20 11:33:00,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:00,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:00,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:00,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:00,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:00,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:00,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19623124] [2021-01-20 11:33:00,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:00,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:00,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:00,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:00,505 INFO L87 Difference]: Start difference. First operand 14942 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:01,263 INFO L93 Difference]: Finished difference Result 15294 states and 35308 transitions. [2021-01-20 11:33:01,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 11:33:01,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:01,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:01,280 INFO L225 Difference]: With dead ends: 15294 [2021-01-20 11:33:01,281 INFO L226 Difference]: Without dead ends: 15142 [2021-01-20 11:33:01,281 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 11:33:01,281 INFO L78 Accepts]: Start accepts. Automaton has 15142 states. Word has length 53 [2021-01-20 11:33:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:01,282 INFO L481 AbstractCegarLoop]: Abstraction has 15142 states. [2021-01-20 11:33:01,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 15142 states. [2021-01-20 11:33:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:01,293 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:01,293 INFO L504 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] [2021-01-20 11:33:01,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:01,494 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:01,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1971730201, now seen corresponding path program 13 times [2021-01-20 11:33:01,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:01,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538339091] [2021-01-20 11:33:01,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:01,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538339091] [2021-01-20 11:33:01,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26345907] [2021-01-20 11:33:01,645 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 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 [2021-01-20 11:33:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:01,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:01,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:01,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:01,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:01,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:01,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503722773] [2021-01-20 11:33:01,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:01,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:01,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:01,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:01,946 INFO L87 Difference]: Start difference. First operand 15142 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:03,051 INFO L93 Difference]: Finished difference Result 15614 states and 35948 transitions. [2021-01-20 11:33:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:33:03,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:03,076 INFO L225 Difference]: With dead ends: 15614 [2021-01-20 11:33:03,076 INFO L226 Difference]: Without dead ends: 15462 [2021-01-20 11:33:03,077 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:33:03,077 INFO L78 Accepts]: Start accepts. Automaton has 15462 states. Word has length 53 [2021-01-20 11:33:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:03,078 INFO L481 AbstractCegarLoop]: Abstraction has 15462 states. [2021-01-20 11:33:03,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 15462 states. [2021-01-20 11:33:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:03,093 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:03,093 INFO L504 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] [2021-01-20 11:33:03,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:03,307 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:03,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:03,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1215729429, now seen corresponding path program 14 times [2021-01-20 11:33:03,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:03,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638824661] [2021-01-20 11:33:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:03,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638824661] [2021-01-20 11:33:03,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603172502] [2021-01-20 11:33:03,467 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 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 [2021-01-20 11:33:03,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:03,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:03,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:03,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:03,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:03,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:03,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072939889] [2021-01-20 11:33:03,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:03,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:03,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:03,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:03,835 INFO L87 Difference]: Start difference. First operand 15462 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:05,394 INFO L93 Difference]: Finished difference Result 17226 states and 39746 transitions. [2021-01-20 11:33:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:33:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:05,414 INFO L225 Difference]: With dead ends: 17226 [2021-01-20 11:33:05,414 INFO L226 Difference]: Without dead ends: 16862 [2021-01-20 11:33:05,415 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=543, Invalid=1809, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 11:33:05,416 INFO L78 Accepts]: Start accepts. Automaton has 16862 states. Word has length 53 [2021-01-20 11:33:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:05,416 INFO L481 AbstractCegarLoop]: Abstraction has 16862 states. [2021-01-20 11:33:05,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 16862 states. [2021-01-20 11:33:05,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:05,427 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:05,428 INFO L504 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] [2021-01-20 11:33:05,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-20 11:33:05,628 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:05,629 INFO L82 PathProgramCache]: Analyzing trace with hash 680245205, now seen corresponding path program 15 times [2021-01-20 11:33:05,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:05,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879187585] [2021-01-20 11:33:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:05,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879187585] [2021-01-20 11:33:05,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058799555] [2021-01-20 11:33:05,790 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 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 [2021-01-20 11:33:05,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:33:05,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:05,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:05,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:06,169 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-01-20 11:33:06,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:06,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:06,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:06,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23257400] [2021-01-20 11:33:06,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:06,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:06,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:06,207 INFO L87 Difference]: Start difference. First operand 16862 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:06,857 INFO L93 Difference]: Finished difference Result 17334 states and 39768 transitions. [2021-01-20 11:33:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:33:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:06,875 INFO L225 Difference]: With dead ends: 17334 [2021-01-20 11:33:06,875 INFO L226 Difference]: Without dead ends: 17182 [2021-01-20 11:33:06,876 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:33:06,876 INFO L78 Accepts]: Start accepts. Automaton has 17182 states. Word has length 53 [2021-01-20 11:33:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:06,876 INFO L481 AbstractCegarLoop]: Abstraction has 17182 states. [2021-01-20 11:33:06,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 17182 states. [2021-01-20 11:33:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:06,888 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:06,888 INFO L504 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] [2021-01-20 11:33:07,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:07,090 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:07,090 INFO L82 PathProgramCache]: Analyzing trace with hash 409323335, now seen corresponding path program 16 times [2021-01-20 11:33:07,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:07,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102683808] [2021-01-20 11:33:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:07,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102683808] [2021-01-20 11:33:07,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518400509] [2021-01-20 11:33:07,245 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 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 [2021-01-20 11:33:07,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:07,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:07,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:07,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:07,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:07,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827976664] [2021-01-20 11:33:07,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:07,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:07,536 INFO L87 Difference]: Start difference. First operand 17182 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:08,308 INFO L93 Difference]: Finished difference Result 17614 states and 40328 transitions. [2021-01-20 11:33:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 11:33:08,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:08,330 INFO L225 Difference]: With dead ends: 17614 [2021-01-20 11:33:08,330 INFO L226 Difference]: Without dead ends: 17462 [2021-01-20 11:33:08,331 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:33:08,331 INFO L78 Accepts]: Start accepts. Automaton has 17462 states. Word has length 53 [2021-01-20 11:33:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:08,331 INFO L481 AbstractCegarLoop]: Abstraction has 17462 states. [2021-01-20 11:33:08,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 17462 states. [2021-01-20 11:33:08,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:08,346 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:08,346 INFO L504 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] [2021-01-20 11:33:08,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-20 11:33:08,547 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash -284076831, now seen corresponding path program 17 times [2021-01-20 11:33:08,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:08,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226832844] [2021-01-20 11:33:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:08,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226832844] [2021-01-20 11:33:08,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930857047] [2021-01-20 11:33:08,702 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 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 [2021-01-20 11:33:08,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:33:08,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:08,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:08,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:08,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:08,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:08,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538146411] [2021-01-20 11:33:08,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:08,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:08,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:08,992 INFO L87 Difference]: Start difference. First operand 17462 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:09,961 INFO L93 Difference]: Finished difference Result 18054 states and 41208 transitions. [2021-01-20 11:33:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 11:33:09,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:09,980 INFO L225 Difference]: With dead ends: 18054 [2021-01-20 11:33:09,980 INFO L226 Difference]: Without dead ends: 17902 [2021-01-20 11:33:09,980 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:33:09,980 INFO L78 Accepts]: Start accepts. Automaton has 17902 states. Word has length 53 [2021-01-20 11:33:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:09,981 INFO L481 AbstractCegarLoop]: Abstraction has 17902 states. [2021-01-20 11:33:09,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 17902 states. [2021-01-20 11:33:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:09,992 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:09,992 INFO L504 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] [2021-01-20 11:33:10,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:10,193 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:10,194 INFO L82 PathProgramCache]: Analyzing trace with hash -554998701, now seen corresponding path program 18 times [2021-01-20 11:33:10,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:10,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695708471] [2021-01-20 11:33:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:10,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695708471] [2021-01-20 11:33:10,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415882953] [2021-01-20 11:33:10,364 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 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 [2021-01-20 11:33:10,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:10,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:10,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:10,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:10,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:10,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:10,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505526401] [2021-01-20 11:33:10,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:10,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:10,647 INFO L87 Difference]: Start difference. First operand 17902 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:11,659 INFO L93 Difference]: Finished difference Result 18254 states and 41608 transitions. [2021-01-20 11:33:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:33:11,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:11,678 INFO L225 Difference]: With dead ends: 18254 [2021-01-20 11:33:11,678 INFO L226 Difference]: Without dead ends: 18102 [2021-01-20 11:33:11,679 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:33:11,679 INFO L78 Accepts]: Start accepts. Automaton has 18102 states. Word has length 53 [2021-01-20 11:33:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:11,679 INFO L481 AbstractCegarLoop]: Abstraction has 18102 states. [2021-01-20 11:33:11,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states. [2021-01-20 11:33:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:11,690 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:11,690 INFO L504 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] [2021-01-20 11:33:11,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-20 11:33:11,891 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:11,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2036829567, now seen corresponding path program 19 times [2021-01-20 11:33:11,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:11,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466342471] [2021-01-20 11:33:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:12,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466342471] [2021-01-20 11:33:12,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033444107] [2021-01-20 11:33:12,049 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 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 [2021-01-20 11:33:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:12,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:12,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:12,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:12,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:12,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495971316] [2021-01-20 11:33:12,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:12,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:12,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:12,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:12,318 INFO L87 Difference]: Start difference. First operand 18102 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:13,493 INFO L93 Difference]: Finished difference Result 18414 states and 41928 transitions. [2021-01-20 11:33:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:33:13,493 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:13,514 INFO L225 Difference]: With dead ends: 18414 [2021-01-20 11:33:13,515 INFO L226 Difference]: Without dead ends: 18262 [2021-01-20 11:33:13,515 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:33:13,515 INFO L78 Accepts]: Start accepts. Automaton has 18262 states. Word has length 53 [2021-01-20 11:33:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:13,516 INFO L481 AbstractCegarLoop]: Abstraction has 18262 states. [2021-01-20 11:33:13,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 18262 states. [2021-01-20 11:33:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:13,530 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:13,530 INFO L504 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] [2021-01-20 11:33:13,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:13,731 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1606714029, now seen corresponding path program 20 times [2021-01-20 11:33:13,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:13,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527622839] [2021-01-20 11:33:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:13,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527622839] [2021-01-20 11:33:13,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765016067] [2021-01-20 11:33:13,904 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 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 [2021-01-20 11:33:13,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:13,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:13,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:13,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:14,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:14,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:14,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:14,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907059682] [2021-01-20 11:33:14,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:14,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:14,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:14,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:14,177 INFO L87 Difference]: Start difference. First operand 18262 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:15,185 INFO L93 Difference]: Finished difference Result 18984 states and 43353 transitions. [2021-01-20 11:33:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:33:15,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:15,209 INFO L225 Difference]: With dead ends: 18984 [2021-01-20 11:33:15,209 INFO L226 Difference]: Without dead ends: 18832 [2021-01-20 11:33:15,210 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:33:15,210 INFO L78 Accepts]: Start accepts. Automaton has 18832 states. Word has length 53 [2021-01-20 11:33:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:15,210 INFO L481 AbstractCegarLoop]: Abstraction has 18832 states. [2021-01-20 11:33:15,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 18832 states. [2021-01-20 11:33:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:15,228 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:15,229 INFO L504 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] [2021-01-20 11:33:15,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 11:33:15,430 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:15,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1932252495, now seen corresponding path program 21 times [2021-01-20 11:33:15,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:15,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761380002] [2021-01-20 11:33:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:15,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761380002] [2021-01-20 11:33:15,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300623926] [2021-01-20 11:33:15,625 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 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 [2021-01-20 11:33:15,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:33:15,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:15,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:15,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:15,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:15,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:15,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:15,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:15,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263967806] [2021-01-20 11:33:15,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:15,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:15,955 INFO L87 Difference]: Start difference. First operand 18832 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:17,703 INFO L93 Difference]: Finished difference Result 21566 states and 49188 transitions. [2021-01-20 11:33:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:33:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:17,728 INFO L225 Difference]: With dead ends: 21566 [2021-01-20 11:33:17,728 INFO L226 Difference]: Without dead ends: 21032 [2021-01-20 11:33:17,729 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=656, Invalid=2314, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 11:33:17,730 INFO L78 Accepts]: Start accepts. Automaton has 21032 states. Word has length 53 [2021-01-20 11:33:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:17,730 INFO L481 AbstractCegarLoop]: Abstraction has 21032 states. [2021-01-20 11:33:17,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 21032 states. [2021-01-20 11:33:17,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:17,749 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:17,749 INFO L504 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] [2021-01-20 11:33:17,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 11:33:17,965 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash 75989787, now seen corresponding path program 22 times [2021-01-20 11:33:17,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:17,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862854532] [2021-01-20 11:33:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:18,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862854532] [2021-01-20 11:33:18,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455481151] [2021-01-20 11:33:18,126 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:18,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:18,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:18,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:18,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:18,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:18,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:18,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:18,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998400071] [2021-01-20 11:33:18,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:18,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:18,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:18,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:18,399 INFO L87 Difference]: Start difference. First operand 21032 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:19,614 INFO L93 Difference]: Finished difference Result 21584 states and 48933 transitions. [2021-01-20 11:33:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:33:19,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:19,638 INFO L225 Difference]: With dead ends: 21584 [2021-01-20 11:33:19,638 INFO L226 Difference]: Without dead ends: 21432 [2021-01-20 11:33:19,639 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=492, Invalid=1578, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:33:19,639 INFO L78 Accepts]: Start accepts. Automaton has 21432 states. Word has length 53 [2021-01-20 11:33:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:19,639 INFO L481 AbstractCegarLoop]: Abstraction has 21432 states. [2021-01-20 11:33:19,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 21432 states. [2021-01-20 11:33:19,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:19,657 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:19,657 INFO L504 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] [2021-01-20 11:33:19,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 11:33:19,858 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:19,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1798070651, now seen corresponding path program 23 times [2021-01-20 11:33:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:19,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722711738] [2021-01-20 11:33:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:19,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722711738] [2021-01-20 11:33:19,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033542984] [2021-01-20 11:33:19,998 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:20,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:33:20,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:20,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:20,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:20,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:20,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:20,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:20,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516898136] [2021-01-20 11:33:20,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:20,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:20,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:20,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:20,289 INFO L87 Difference]: Start difference. First operand 21432 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:21,722 INFO L93 Difference]: Finished difference Result 22534 states and 50928 transitions. [2021-01-20 11:33:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:33:21,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:21,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:21,748 INFO L225 Difference]: With dead ends: 22534 [2021-01-20 11:33:21,748 INFO L226 Difference]: Without dead ends: 22382 [2021-01-20 11:33:21,749 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:33:21,749 INFO L78 Accepts]: Start accepts. Automaton has 22382 states. Word has length 53 [2021-01-20 11:33:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:21,749 INFO L481 AbstractCegarLoop]: Abstraction has 22382 states. [2021-01-20 11:33:21,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 22382 states. [2021-01-20 11:33:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:21,762 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:21,763 INFO L504 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] [2021-01-20 11:33:21,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-20 11:33:21,963 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:21,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1740895873, now seen corresponding path program 24 times [2021-01-20 11:33:21,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:21,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94669424] [2021-01-20 11:33:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:22,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94669424] [2021-01-20 11:33:22,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305336258] [2021-01-20 11:33:22,126 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:22,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:33:22,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:22,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:22,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:22,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:22,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:22,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:22,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:22,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944519352] [2021-01-20 11:33:22,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:22,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:22,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:22,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:22,471 INFO L87 Difference]: Start difference. First operand 22382 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:24,527 INFO L93 Difference]: Finished difference Result 26056 states and 59213 transitions. [2021-01-20 11:33:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 11:33:24,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:24,568 INFO L225 Difference]: With dead ends: 26056 [2021-01-20 11:33:24,569 INFO L226 Difference]: Without dead ends: 25522 [2021-01-20 11:33:24,571 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=756, Invalid=2550, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 11:33:24,571 INFO L78 Accepts]: Start accepts. Automaton has 25522 states. Word has length 53 [2021-01-20 11:33:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:24,571 INFO L481 AbstractCegarLoop]: Abstraction has 25522 states. [2021-01-20 11:33:24,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:24,572 INFO L276 IsEmpty]: Start isEmpty. Operand 25522 states. [2021-01-20 11:33:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:24,593 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:24,593 INFO L504 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] [2021-01-20 11:33:24,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:24,808 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash 499168331, now seen corresponding path program 25 times [2021-01-20 11:33:24,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:24,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501876387] [2021-01-20 11:33:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:24,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501876387] [2021-01-20 11:33:24,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595817137] [2021-01-20 11:33:24,965 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:25,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:25,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:25,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:25,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:25,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:25,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519572118] [2021-01-20 11:33:25,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:25,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:25,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:25,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:25,228 INFO L87 Difference]: Start difference. First operand 25522 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:25,883 INFO L93 Difference]: Finished difference Result 26674 states and 60158 transitions. [2021-01-20 11:33:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 11:33:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:25,910 INFO L225 Difference]: With dead ends: 26674 [2021-01-20 11:33:25,910 INFO L226 Difference]: Without dead ends: 26522 [2021-01-20 11:33:25,911 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-01-20 11:33:25,911 INFO L78 Accepts]: Start accepts. Automaton has 26522 states. Word has length 53 [2021-01-20 11:33:25,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:25,911 INFO L481 AbstractCegarLoop]: Abstraction has 26522 states. [2021-01-20 11:33:25,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand 26522 states. [2021-01-20 11:33:25,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:25,924 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:25,924 INFO L504 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] [2021-01-20 11:33:26,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 11:33:26,138 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1299793979, now seen corresponding path program 26 times [2021-01-20 11:33:26,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:26,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747859378] [2021-01-20 11:33:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:26,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747859378] [2021-01-20 11:33:26,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911707599] [2021-01-20 11:33:26,312 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:26,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:26,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:26,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:26,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:26,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:26,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:26,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:26,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048327891] [2021-01-20 11:33:26,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:26,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:26,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:26,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:26,592 INFO L87 Difference]: Start difference. First operand 26522 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:27,093 INFO L93 Difference]: Finished difference Result 26874 states and 60558 transitions. [2021-01-20 11:33:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 11:33:27,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:27,125 INFO L225 Difference]: With dead ends: 26874 [2021-01-20 11:33:27,125 INFO L226 Difference]: Without dead ends: 26722 [2021-01-20 11:33:27,126 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-01-20 11:33:27,126 INFO L78 Accepts]: Start accepts. Automaton has 26722 states. Word has length 53 [2021-01-20 11:33:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:27,126 INFO L481 AbstractCegarLoop]: Abstraction has 26722 states. [2021-01-20 11:33:27,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 26722 states. [2021-01-20 11:33:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:27,141 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:27,141 INFO L504 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] [2021-01-20 11:33:27,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-20 11:33:27,342 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:27,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1615896897, now seen corresponding path program 27 times [2021-01-20 11:33:27,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:27,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362946489] [2021-01-20 11:33:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:27,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362946489] [2021-01-20 11:33:27,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184288255] [2021-01-20 11:33:27,681 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:27,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:33:27,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:27,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:27,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:27,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:27,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:27,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613239595] [2021-01-20 11:33:27,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:27,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:27,999 INFO L87 Difference]: Start difference. First operand 26722 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:28,640 INFO L93 Difference]: Finished difference Result 27474 states and 61758 transitions. [2021-01-20 11:33:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:33:28,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:28,675 INFO L225 Difference]: With dead ends: 27474 [2021-01-20 11:33:28,676 INFO L226 Difference]: Without dead ends: 27322 [2021-01-20 11:33:28,676 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-01-20 11:33:28,676 INFO L78 Accepts]: Start accepts. Automaton has 27322 states. Word has length 53 [2021-01-20 11:33:28,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:28,676 INFO L481 AbstractCegarLoop]: Abstraction has 27322 states. [2021-01-20 11:33:28,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 27322 states. [2021-01-20 11:33:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:28,697 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:28,697 INFO L504 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] [2021-01-20 11:33:28,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:28,898 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash 880108089, now seen corresponding path program 28 times [2021-01-20 11:33:28,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:28,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133307339] [2021-01-20 11:33:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:29,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133307339] [2021-01-20 11:33:29,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010125120] [2021-01-20 11:33:29,071 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:29,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:29,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:29,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:29,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:29,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:29,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:29,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:29,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678582675] [2021-01-20 11:33:29,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:29,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:29,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:29,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:29,340 INFO L87 Difference]: Start difference. First operand 27322 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:30,122 INFO L93 Difference]: Finished difference Result 27674 states and 62158 transitions. [2021-01-20 11:33:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:33:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:30,151 INFO L225 Difference]: With dead ends: 27674 [2021-01-20 11:33:30,152 INFO L226 Difference]: Without dead ends: 27522 [2021-01-20 11:33:30,152 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2021-01-20 11:33:30,152 INFO L78 Accepts]: Start accepts. Automaton has 27522 states. Word has length 53 [2021-01-20 11:33:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:30,152 INFO L481 AbstractCegarLoop]: Abstraction has 27522 states. [2021-01-20 11:33:30,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 27522 states. [2021-01-20 11:33:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:30,167 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:30,167 INFO L504 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] [2021-01-20 11:33:30,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-20 11:33:30,368 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:30,368 INFO L82 PathProgramCache]: Analyzing trace with hash 840549663, now seen corresponding path program 29 times [2021-01-20 11:33:30,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:30,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445068993] [2021-01-20 11:33:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:30,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445068993] [2021-01-20 11:33:30,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945571557] [2021-01-20 11:33:30,515 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:30,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:30,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:30,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:30,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:30,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:30,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:30,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:30,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400634197] [2021-01-20 11:33:30,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:30,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:30,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:30,793 INFO L87 Difference]: Start difference. First operand 27522 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:31,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:31,424 INFO L93 Difference]: Finished difference Result 27794 states and 62398 transitions. [2021-01-20 11:33:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 11:33:31,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:31,457 INFO L225 Difference]: With dead ends: 27794 [2021-01-20 11:33:31,457 INFO L226 Difference]: Without dead ends: 27642 [2021-01-20 11:33:31,457 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-01-20 11:33:31,457 INFO L78 Accepts]: Start accepts. Automaton has 27642 states. Word has length 53 [2021-01-20 11:33:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:31,458 INFO L481 AbstractCegarLoop]: Abstraction has 27642 states. [2021-01-20 11:33:31,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 27642 states. [2021-01-20 11:33:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:31,473 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:31,473 INFO L504 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] [2021-01-20 11:33:31,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:31,674 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash -958412647, now seen corresponding path program 30 times [2021-01-20 11:33:31,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:31,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585342655] [2021-01-20 11:33:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:31,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585342655] [2021-01-20 11:33:31,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754587067] [2021-01-20 11:33:31,833 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:31,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 11:33:31,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:31,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:31,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:32,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:32,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:32,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:32,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098385232] [2021-01-20 11:33:32,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:32,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:32,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:32,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:32,091 INFO L87 Difference]: Start difference. First operand 27642 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:32,484 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-01-20 11:33:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:32,922 INFO L93 Difference]: Finished difference Result 27874 states and 62558 transitions. [2021-01-20 11:33:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:33:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:32,954 INFO L225 Difference]: With dead ends: 27874 [2021-01-20 11:33:32,954 INFO L226 Difference]: Without dead ends: 27722 [2021-01-20 11:33:32,955 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-01-20 11:33:32,955 INFO L78 Accepts]: Start accepts. Automaton has 27722 states. Word has length 53 [2021-01-20 11:33:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:32,955 INFO L481 AbstractCegarLoop]: Abstraction has 27722 states. [2021-01-20 11:33:32,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:32,955 INFO L276 IsEmpty]: Start isEmpty. Operand 27722 states. [2021-01-20 11:33:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:32,972 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:32,972 INFO L504 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] [2021-01-20 11:33:33,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-20 11:33:33,173 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash -854790029, now seen corresponding path program 31 times [2021-01-20 11:33:33,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:33,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319052935] [2021-01-20 11:33:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:33,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319052935] [2021-01-20 11:33:33,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726531542] [2021-01-20 11:33:33,329 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:33,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:33,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:33,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:33,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:33,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:33,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102549284] [2021-01-20 11:33:33,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:33,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:33,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:33,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:33,606 INFO L87 Difference]: Start difference. First operand 27722 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:34,336 INFO L93 Difference]: Finished difference Result 27994 states and 62798 transitions. [2021-01-20 11:33:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:33:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:34,370 INFO L225 Difference]: With dead ends: 27994 [2021-01-20 11:33:34,370 INFO L226 Difference]: Without dead ends: 27842 [2021-01-20 11:33:34,370 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:33:34,371 INFO L78 Accepts]: Start accepts. Automaton has 27842 states. Word has length 53 [2021-01-20 11:33:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:34,371 INFO L481 AbstractCegarLoop]: Abstraction has 27842 states. [2021-01-20 11:33:34,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 27842 states. [2021-01-20 11:33:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:34,387 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:34,387 INFO L504 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] [2021-01-20 11:33:34,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 11:33:34,588 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1725522547, now seen corresponding path program 32 times [2021-01-20 11:33:34,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:34,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139430597] [2021-01-20 11:33:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:34,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139430597] [2021-01-20 11:33:34,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755137324] [2021-01-20 11:33:34,736 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:34,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:34,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:34,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:34,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:35,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:35,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:35,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:35,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453231876] [2021-01-20 11:33:35,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:35,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:35,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:35,146 INFO L87 Difference]: Start difference. First operand 27842 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:35,994 INFO L93 Difference]: Finished difference Result 28194 states and 63198 transitions. [2021-01-20 11:33:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:33:35,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:35,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:36,029 INFO L225 Difference]: With dead ends: 28194 [2021-01-20 11:33:36,029 INFO L226 Difference]: Without dead ends: 28042 [2021-01-20 11:33:36,031 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 11:33:36,031 INFO L78 Accepts]: Start accepts. Automaton has 28042 states. Word has length 53 [2021-01-20 11:33:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:36,031 INFO L481 AbstractCegarLoop]: Abstraction has 28042 states. [2021-01-20 11:33:36,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 28042 states. [2021-01-20 11:33:36,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:36,049 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:36,049 INFO L504 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] [2021-01-20 11:33:36,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 11:33:36,250 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:36,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:36,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2141327283, now seen corresponding path program 33 times [2021-01-20 11:33:36,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:36,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096750022] [2021-01-20 11:33:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:36,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096750022] [2021-01-20 11:33:36,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654928402] [2021-01-20 11:33:36,438 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:36,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 11:33:36,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:36,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:36,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:36,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:36,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:36,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774716803] [2021-01-20 11:33:36,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:36,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:36,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:36,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:36,732 INFO L87 Difference]: Start difference. First operand 28042 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:37,721 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-01-20 11:33:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:38,377 INFO L93 Difference]: Finished difference Result 30266 states and 68106 transitions. [2021-01-20 11:33:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:33:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:38,422 INFO L225 Difference]: With dead ends: 30266 [2021-01-20 11:33:38,422 INFO L226 Difference]: Without dead ends: 29902 [2021-01-20 11:33:38,423 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=576, Invalid=1974, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 11:33:38,423 INFO L78 Accepts]: Start accepts. Automaton has 29902 states. Word has length 53 [2021-01-20 11:33:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:38,423 INFO L481 AbstractCegarLoop]: Abstraction has 29902 states. [2021-01-20 11:33:38,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 29902 states. [2021-01-20 11:33:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:38,444 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:38,444 INFO L504 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] [2021-01-20 11:33:38,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-20 11:33:38,645 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash -270011115, now seen corresponding path program 34 times [2021-01-20 11:33:38,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:38,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742599020] [2021-01-20 11:33:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:38,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742599020] [2021-01-20 11:33:38,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309210925] [2021-01-20 11:33:38,832 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:38,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:38,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:38,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:33:38,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:39,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:39,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:39,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:39,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942792964] [2021-01-20 11:33:39,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:39,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:39,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:39,125 INFO L87 Difference]: Start difference. First operand 29902 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:40,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:40,136 INFO L93 Difference]: Finished difference Result 30174 states and 67728 transitions. [2021-01-20 11:33:40,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:33:40,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:40,174 INFO L225 Difference]: With dead ends: 30174 [2021-01-20 11:33:40,174 INFO L226 Difference]: Without dead ends: 30022 [2021-01-20 11:33:40,174 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 11:33:40,174 INFO L78 Accepts]: Start accepts. Automaton has 30022 states. Word has length 53 [2021-01-20 11:33:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:40,175 INFO L481 AbstractCegarLoop]: Abstraction has 30022 states. [2021-01-20 11:33:40,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 30022 states. [2021-01-20 11:33:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:40,196 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:40,196 INFO L504 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] [2021-01-20 11:33:40,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:40,397 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1452069749, now seen corresponding path program 35 times [2021-01-20 11:33:40,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:40,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685018532] [2021-01-20 11:33:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:40,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685018532] [2021-01-20 11:33:40,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060633814] [2021-01-20 11:33:40,558 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:40,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:40,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:40,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:40,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:40,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:40,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:40,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887949651] [2021-01-20 11:33:40,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:40,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:40,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:40,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:40,968 INFO L87 Difference]: Start difference. First operand 30022 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:41,839 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-01-20 11:33:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:41,990 INFO L93 Difference]: Finished difference Result 30214 states and 67808 transitions. [2021-01-20 11:33:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:33:41,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:42,022 INFO L225 Difference]: With dead ends: 30214 [2021-01-20 11:33:42,023 INFO L226 Difference]: Without dead ends: 30062 [2021-01-20 11:33:42,023 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:33:42,023 INFO L78 Accepts]: Start accepts. Automaton has 30062 states. Word has length 53 [2021-01-20 11:33:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:42,023 INFO L481 AbstractCegarLoop]: Abstraction has 30062 states. [2021-01-20 11:33:42,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 30062 states. [2021-01-20 11:33:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 11:33:42,038 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:42,038 INFO L504 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] [2021-01-20 11:33:42,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-20 11:33:42,239 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:42,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2086896775, now seen corresponding path program 36 times [2021-01-20 11:33:42,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:42,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143185394] [2021-01-20 11:33:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:42,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143185394] [2021-01-20 11:33:42,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139784094] [2021-01-20 11:33:42,390 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:42,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 11:33:42,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:42,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 11:33:42,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:42,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:33:42,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:42,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:42,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 11:33:42,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116741026] [2021-01-20 11:33:42,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:42,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:42,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:42,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:42,649 INFO L87 Difference]: Start difference. First operand 30062 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:44,150 INFO L93 Difference]: Finished difference Result 31636 states and 71131 transitions. [2021-01-20 11:33:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:33:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 53 [2021-01-20 11:33:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:44,185 INFO L225 Difference]: With dead ends: 31636 [2021-01-20 11:33:44,185 INFO L226 Difference]: Without dead ends: 31272 [2021-01-20 11:33:44,186 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 11:33:44,186 INFO L78 Accepts]: Start accepts. Automaton has 31272 states. Word has length 53 [2021-01-20 11:33:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:44,186 INFO L481 AbstractCegarLoop]: Abstraction has 31272 states. [2021-01-20 11:33:44,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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) [2021-01-20 11:33:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 31272 states. [2021-01-20 11:33:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:44,209 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:44,209 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:44,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:44,410 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2038569245, now seen corresponding path program 3 times [2021-01-20 11:33:44,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:44,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221284861] [2021-01-20 11:33:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:44,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221284861] [2021-01-20 11:33:44,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111274513] [2021-01-20 11:33:44,676 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:44,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 11:33:44,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:44,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:44,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:44,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:44,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:45,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:45,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:45,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204547110] [2021-01-20 11:33:45,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:45,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:45,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:45,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:45,007 INFO L87 Difference]: Start difference. First operand 31272 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:33:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:45,793 INFO L93 Difference]: Finished difference Result 32504 states and 73057 transitions. [2021-01-20 11:33:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 11:33:45,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:33:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:45,830 INFO L225 Difference]: With dead ends: 32504 [2021-01-20 11:33:45,830 INFO L226 Difference]: Without dead ends: 32140 [2021-01-20 11:33:45,830 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 11:33:45,830 INFO L78 Accepts]: Start accepts. Automaton has 32140 states. Word has length 58 [2021-01-20 11:33:45,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:45,831 INFO L481 AbstractCegarLoop]: Abstraction has 32140 states. [2021-01-20 11:33:45,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:33:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand 32140 states. [2021-01-20 11:33:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:45,858 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:45,858 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:46,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-20 11:33:46,059 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1808185776, now seen corresponding path program 7 times [2021-01-20 11:33:46,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:46,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243131548] [2021-01-20 11:33:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:46,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243131548] [2021-01-20 11:33:46,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631230449] [2021-01-20 11:33:46,243 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:46,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:46,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:46,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:46,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:46,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974408861] [2021-01-20 11:33:46,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:46,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:46,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:46,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:46,611 INFO L87 Difference]: Start difference. First operand 32140 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:33:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:47,204 INFO L93 Difference]: Finished difference Result 32332 states and 72519 transitions. [2021-01-20 11:33:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 11:33:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:33:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:47,239 INFO L225 Difference]: With dead ends: 32332 [2021-01-20 11:33:47,239 INFO L226 Difference]: Without dead ends: 32180 [2021-01-20 11:33:47,240 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-01-20 11:33:47,240 INFO L78 Accepts]: Start accepts. Automaton has 32180 states. Word has length 58 [2021-01-20 11:33:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:47,240 INFO L481 AbstractCegarLoop]: Abstraction has 32180 states. [2021-01-20 11:33:47,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:33:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 32180 states. [2021-01-20 11:33:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:47,267 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:47,267 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:33:47,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-20 11:33:47,468 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash 804219266, now seen corresponding path program 8 times [2021-01-20 11:33:47,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:47,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26475810] [2021-01-20 11:33:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:47,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26475810] [2021-01-20 11:33:47,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837227390] [2021-01-20 11:33:47,663 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:47,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:47,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:33:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:47,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:47,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:47,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-01-20 11:33:47,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788162234] [2021-01-20 11:33:47,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:33:47,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:47,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:33:47,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:33:47,869 INFO L87 Difference]: Start difference. First operand 32180 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:48,785 INFO L93 Difference]: Finished difference Result 33460 states and 75287 transitions. [2021-01-20 11:33:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 11:33:48,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:48,827 INFO L225 Difference]: With dead ends: 33460 [2021-01-20 11:33:48,827 INFO L226 Difference]: Without dead ends: 32920 [2021-01-20 11:33:48,828 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 11:33:48,828 INFO L78 Accepts]: Start accepts. Automaton has 32920 states. Word has length 58 [2021-01-20 11:33:48,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:48,828 INFO L481 AbstractCegarLoop]: Abstraction has 32920 states. [2021-01-20 11:33:48,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 32920 states. [2021-01-20 11:33:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:48,858 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:48,858 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:33:49,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:49,059 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:49,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:49,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1992619272, now seen corresponding path program 37 times [2021-01-20 11:33:49,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:49,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814834475] [2021-01-20 11:33:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:49,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814834475] [2021-01-20 11:33:49,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392680620] [2021-01-20 11:33:49,364 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:49,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:49,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:49,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:49,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:49,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:49,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760430535] [2021-01-20 11:33:49,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:49,799 INFO L87 Difference]: Start difference. First operand 32920 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:33:52,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:52,179 INFO L93 Difference]: Finished difference Result 33360 states and 74829 transitions. [2021-01-20 11:33:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 11:33:52,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:33:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:52,218 INFO L225 Difference]: With dead ends: 33360 [2021-01-20 11:33:52,218 INFO L226 Difference]: Without dead ends: 33120 [2021-01-20 11:33:52,218 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:33:52,219 INFO L78 Accepts]: Start accepts. Automaton has 33120 states. Word has length 58 [2021-01-20 11:33:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:52,219 INFO L481 AbstractCegarLoop]: Abstraction has 33120 states. [2021-01-20 11:33:52,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:33:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 33120 states. [2021-01-20 11:33:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:52,244 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:52,244 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:33:52,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-20 11:33:52,445 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:52,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1033008748, now seen corresponding path program 38 times [2021-01-20 11:33:52,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:52,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963909980] [2021-01-20 11:33:52,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:52,691 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-20 11:33:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:52,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963909980] [2021-01-20 11:33:52,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779587091] [2021-01-20 11:33:52,747 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:52,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:33:52,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:33:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:53,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:53,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:53,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:33:53,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364662168] [2021-01-20 11:33:53,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:33:53,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:53,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:33:53,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:33:53,209 INFO L87 Difference]: Start difference. First operand 33120 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:33:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:57,392 INFO L93 Difference]: Finished difference Result 33560 states and 75229 transitions. [2021-01-20 11:33:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:33:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:33:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:57,447 INFO L225 Difference]: With dead ends: 33560 [2021-01-20 11:33:57,448 INFO L226 Difference]: Without dead ends: 33320 [2021-01-20 11:33:57,448 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 11:33:57,448 INFO L78 Accepts]: Start accepts. Automaton has 33320 states. Word has length 58 [2021-01-20 11:33:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:57,449 INFO L481 AbstractCegarLoop]: Abstraction has 33320 states. [2021-01-20 11:33:57,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:33:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 33320 states. [2021-01-20 11:33:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:57,483 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:57,483 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:33:57,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-20 11:33:57,697 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:57,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1539877684, now seen corresponding path program 39 times [2021-01-20 11:33:57,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:57,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250533818] [2021-01-20 11:33:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:57,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250533818] [2021-01-20 11:33:57,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895928195] [2021-01-20 11:33:57,885 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:58,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:33:58,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:58,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 11:33:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:33:58,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:33:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:58,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:33:58,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-01-20 11:33:58,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893529042] [2021-01-20 11:33:58,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 11:33:58,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:33:58,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 11:33:58,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-01-20 11:33:58,243 INFO L87 Difference]: Start difference. First operand 33320 states. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:33:59,406 INFO L93 Difference]: Finished difference Result 33512 states and 75069 transitions. [2021-01-20 11:33:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:33:59,407 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-20 11:33:59,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:33:59,447 INFO L225 Difference]: With dead ends: 33512 [2021-01-20 11:33:59,447 INFO L226 Difference]: Without dead ends: 33360 [2021-01-20 11:33:59,447 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=350, Invalid=1210, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:33:59,447 INFO L78 Accepts]: Start accepts. Automaton has 33360 states. Word has length 58 [2021-01-20 11:33:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:33:59,447 INFO L481 AbstractCegarLoop]: Abstraction has 33360 states. [2021-01-20 11:33:59,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:33:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 33360 states. [2021-01-20 11:33:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:33:59,472 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:33:59,472 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:33:59,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-20 11:33:59,686 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:33:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:33:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash -783876912, now seen corresponding path program 40 times [2021-01-20 11:33:59,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:33:59,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301983173] [2021-01-20 11:33:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:33:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:33:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:33:59,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301983173] [2021-01-20 11:33:59,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555271863] [2021-01-20 11:33:59,882 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:33:59,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:33:59,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:33:59,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:33:59,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:00,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:00,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:00,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:00,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:34:00,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884699441] [2021-01-20 11:34:00,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:34:00,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:00,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:34:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:34:00,304 INFO L87 Difference]: Start difference. First operand 33360 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:34:00,675 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2021-01-20 11:34:02,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:02,386 INFO L93 Difference]: Finished difference Result 34624 states and 77677 transitions. [2021-01-20 11:34:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:34:02,387 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:34:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:02,429 INFO L225 Difference]: With dead ends: 34624 [2021-01-20 11:34:02,429 INFO L226 Difference]: Without dead ends: 34260 [2021-01-20 11:34:02,430 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=623, Invalid=2133, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:34:02,430 INFO L78 Accepts]: Start accepts. Automaton has 34260 states. Word has length 58 [2021-01-20 11:34:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:02,430 INFO L481 AbstractCegarLoop]: Abstraction has 34260 states. [2021-01-20 11:34:02,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:34:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 34260 states. [2021-01-20 11:34:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:02,464 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:02,464 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:34:02,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:02,665 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:02,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1112097722, now seen corresponding path program 41 times [2021-01-20 11:34:02,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:02,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448048941] [2021-01-20 11:34:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:02,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448048941] [2021-01-20 11:34:02,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025935742] [2021-01-20 11:34:02,896 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:03,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:34:03,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:03,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:03,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:03,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:03,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:03,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:03,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240774797] [2021-01-20 11:34:03,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:03,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:03,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:03,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:03,501 INFO L87 Difference]: Start difference. First operand 34260 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:04,312 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 13 [2021-01-20 11:34:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:04,681 INFO L93 Difference]: Finished difference Result 34692 states and 77619 transitions. [2021-01-20 11:34:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 11:34:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:04,721 INFO L225 Difference]: With dead ends: 34692 [2021-01-20 11:34:04,721 INFO L226 Difference]: Without dead ends: 34540 [2021-01-20 11:34:04,722 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:34:04,722 INFO L78 Accepts]: Start accepts. Automaton has 34540 states. Word has length 58 [2021-01-20 11:34:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:04,722 INFO L481 AbstractCegarLoop]: Abstraction has 34540 states. [2021-01-20 11:34:04,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 34540 states. [2021-01-20 11:34:04,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:04,757 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:04,758 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:04,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:04,972 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:04,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:04,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1654829134, now seen corresponding path program 42 times [2021-01-20 11:34:04,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:04,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203930534] [2021-01-20 11:34:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:05,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203930534] [2021-01-20 11:34:05,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22521213] [2021-01-20 11:34:05,169 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:05,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:34:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:05,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:05,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:05,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:05,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:05,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:05,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:05,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57040048] [2021-01-20 11:34:05,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:05,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:05,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:05,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:05,612 INFO L87 Difference]: Start difference. First operand 34540 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:06,817 INFO L93 Difference]: Finished difference Result 35172 states and 78579 transitions. [2021-01-20 11:34:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:34:06,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:06,857 INFO L225 Difference]: With dead ends: 35172 [2021-01-20 11:34:06,857 INFO L226 Difference]: Without dead ends: 35020 [2021-01-20 11:34:06,857 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:34:06,857 INFO L78 Accepts]: Start accepts. Automaton has 35020 states. Word has length 58 [2021-01-20 11:34:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:06,858 INFO L481 AbstractCegarLoop]: Abstraction has 35020 states. [2021-01-20 11:34:06,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 35020 states. [2021-01-20 11:34:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:06,888 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:06,889 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:07,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:07,089 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:07,090 INFO L82 PathProgramCache]: Analyzing trace with hash 841175852, now seen corresponding path program 43 times [2021-01-20 11:34:07,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:07,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505122623] [2021-01-20 11:34:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:07,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505122623] [2021-01-20 11:34:07,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538689608] [2021-01-20 11:34:07,466 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:07,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:07,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:07,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:07,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:07,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:07,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:07,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:07,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:07,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:07,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:07,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:07,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:07,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862924652] [2021-01-20 11:34:07,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:07,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:07,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:07,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:07,975 INFO L87 Difference]: Start difference. First operand 35020 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:09,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:09,266 INFO L93 Difference]: Finished difference Result 35372 states and 78979 transitions. [2021-01-20 11:34:09,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:34:09,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:09,308 INFO L225 Difference]: With dead ends: 35372 [2021-01-20 11:34:09,309 INFO L226 Difference]: Without dead ends: 35220 [2021-01-20 11:34:09,309 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 11:34:09,309 INFO L78 Accepts]: Start accepts. Automaton has 35220 states. Word has length 58 [2021-01-20 11:34:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:09,309 INFO L481 AbstractCegarLoop]: Abstraction has 35220 states. [2021-01-20 11:34:09,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 35220 states. [2021-01-20 11:34:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:09,337 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:09,337 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:34:09,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:09,538 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash 147775686, now seen corresponding path program 44 times [2021-01-20 11:34:09,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:09,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771752978] [2021-01-20 11:34:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:09,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771752978] [2021-01-20 11:34:09,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059580272] [2021-01-20 11:34:09,744 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:09,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:34:09,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:10,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:10,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:10,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:10,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:10,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:10,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223360593] [2021-01-20 11:34:10,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:10,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:10,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:10,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:10,190 INFO L87 Difference]: Start difference. First operand 35220 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:11,669 INFO L93 Difference]: Finished difference Result 35532 states and 79299 transitions. [2021-01-20 11:34:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:34:11,670 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:11,712 INFO L225 Difference]: With dead ends: 35532 [2021-01-20 11:34:11,712 INFO L226 Difference]: Without dead ends: 35380 [2021-01-20 11:34:11,712 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=1419, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:34:11,712 INFO L78 Accepts]: Start accepts. Automaton has 35380 states. Word has length 58 [2021-01-20 11:34:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:11,713 INFO L481 AbstractCegarLoop]: Abstraction has 35380 states. [2021-01-20 11:34:11,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 35380 states. [2021-01-20 11:34:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:11,746 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:11,746 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:11,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-20 11:34:11,961 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:11,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:11,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1675816126, now seen corresponding path program 45 times [2021-01-20 11:34:11,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:11,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077114690] [2021-01-20 11:34:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:12,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077114690] [2021-01-20 11:34:12,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013291432] [2021-01-20 11:34:12,182 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:12,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:34:12,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:12,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:12,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:12,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:12,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:12,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:12,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:12,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:12,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264643067] [2021-01-20 11:34:12,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:12,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:12,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:12,832 INFO L87 Difference]: Start difference. First operand 35380 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:14,233 INFO L93 Difference]: Finished difference Result 35812 states and 79859 transitions. [2021-01-20 11:34:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:34:14,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:14,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:14,271 INFO L225 Difference]: With dead ends: 35812 [2021-01-20 11:34:14,271 INFO L226 Difference]: Without dead ends: 35660 [2021-01-20 11:34:14,271 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 11:34:14,271 INFO L78 Accepts]: Start accepts. Automaton has 35660 states. Word has length 58 [2021-01-20 11:34:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:14,272 INFO L481 AbstractCegarLoop]: Abstraction has 35660 states. [2021-01-20 11:34:14,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:14,272 INFO L276 IsEmpty]: Start isEmpty. Operand 35660 states. [2021-01-20 11:34:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:14,296 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:14,296 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:14,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:14,497 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash -123146184, now seen corresponding path program 46 times [2021-01-20 11:34:14,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:14,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493635298] [2021-01-20 11:34:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:14,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493635298] [2021-01-20 11:34:14,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036694039] [2021-01-20 11:34:14,706 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:14,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:34:14,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:14,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:34:14,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:15,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:15,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:15,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:15,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289934828] [2021-01-20 11:34:15,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:15,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:15,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:15,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:15,239 INFO L87 Difference]: Start difference. First operand 35660 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:16,792 INFO L93 Difference]: Finished difference Result 36012 states and 80259 transitions. [2021-01-20 11:34:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:34:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:16,834 INFO L225 Difference]: With dead ends: 36012 [2021-01-20 11:34:16,834 INFO L226 Difference]: Without dead ends: 35860 [2021-01-20 11:34:16,835 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 11:34:16,835 INFO L78 Accepts]: Start accepts. Automaton has 35860 states. Word has length 58 [2021-01-20 11:34:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:16,835 INFO L481 AbstractCegarLoop]: Abstraction has 35860 states. [2021-01-20 11:34:16,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 35860 states. [2021-01-20 11:34:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:16,862 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:16,862 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:34:17,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-20 11:34:17,063 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1604977050, now seen corresponding path program 47 times [2021-01-20 11:34:17,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:17,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111147180] [2021-01-20 11:34:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:17,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111147180] [2021-01-20 11:34:17,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317937733] [2021-01-20 11:34:17,263 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:17,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:34:17,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:17,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:17,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:17,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:17,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:17,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364319316] [2021-01-20 11:34:17,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:17,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:17,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:17,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:17,702 INFO L87 Difference]: Start difference. First operand 35860 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:18,319 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-01-20 11:34:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:19,460 INFO L93 Difference]: Finished difference Result 36172 states and 80579 transitions. [2021-01-20 11:34:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:34:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:19,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:19,505 INFO L225 Difference]: With dead ends: 36172 [2021-01-20 11:34:19,505 INFO L226 Difference]: Without dead ends: 36020 [2021-01-20 11:34:19,505 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=490, Invalid=1672, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:34:19,505 INFO L78 Accepts]: Start accepts. Automaton has 36020 states. Word has length 58 [2021-01-20 11:34:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:19,506 INFO L481 AbstractCegarLoop]: Abstraction has 36020 states. [2021-01-20 11:34:19,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 36020 states. [2021-01-20 11:34:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:19,533 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:19,533 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:19,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:19,739 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash -76936610, now seen corresponding path program 48 times [2021-01-20 11:34:19,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:19,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572683417] [2021-01-20 11:34:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:19,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572683417] [2021-01-20 11:34:19,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947367042] [2021-01-20 11:34:19,932 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:20,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:34:20,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:20,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:20,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:20,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:20,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:20,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:20,508 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2021-01-20 11:34:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:20,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:20,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:20,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292244444] [2021-01-20 11:34:20,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:20,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:20,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:20,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:20,536 INFO L87 Difference]: Start difference. First operand 36020 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:22,253 INFO L93 Difference]: Finished difference Result 36572 states and 81379 transitions. [2021-01-20 11:34:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:34:22,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:22,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:22,295 INFO L225 Difference]: With dead ends: 36572 [2021-01-20 11:34:22,295 INFO L226 Difference]: Without dead ends: 36420 [2021-01-20 11:34:22,296 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=474, Invalid=1688, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:34:22,296 INFO L78 Accepts]: Start accepts. Automaton has 36420 states. Word has length 58 [2021-01-20 11:34:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:22,296 INFO L481 AbstractCegarLoop]: Abstraction has 36420 states. [2021-01-20 11:34:22,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 36420 states. [2021-01-20 11:34:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:22,323 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:22,324 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:34:22,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-20 11:34:22,524 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:22,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2038566546, now seen corresponding path program 49 times [2021-01-20 11:34:22,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:22,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142480040] [2021-01-20 11:34:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:22,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142480040] [2021-01-20 11:34:22,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919527425] [2021-01-20 11:34:22,718 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:22,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:22,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:23,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:23,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:23,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:23,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:23,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:23,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013454588] [2021-01-20 11:34:23,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:23,354 INFO L87 Difference]: Start difference. First operand 36420 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:24,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:24,912 INFO L93 Difference]: Finished difference Result 36692 states and 81619 transitions. [2021-01-20 11:34:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:34:24,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:24,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:24,956 INFO L225 Difference]: With dead ends: 36692 [2021-01-20 11:34:24,956 INFO L226 Difference]: Without dead ends: 36540 [2021-01-20 11:34:24,957 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:34:24,957 INFO L78 Accepts]: Start accepts. Automaton has 36540 states. Word has length 58 [2021-01-20 11:34:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:24,957 INFO L481 AbstractCegarLoop]: Abstraction has 36540 states. [2021-01-20 11:34:24,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 36540 states. [2021-01-20 11:34:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:25,098 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:25,098 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:34:25,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:25,305 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:25,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1500399978, now seen corresponding path program 50 times [2021-01-20 11:34:25,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:25,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097871607] [2021-01-20 11:34:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:25,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097871607] [2021-01-20 11:34:25,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925659225] [2021-01-20 11:34:25,544 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:25,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:34:25,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:25,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:25,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:25,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:25,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:25,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:26,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:26,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:26,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:34:26,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151646976] [2021-01-20 11:34:26,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:34:26,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:26,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:34:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:34:26,103 INFO L87 Difference]: Start difference. First operand 36540 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:34:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:28,567 INFO L93 Difference]: Finished difference Result 38194 states and 85102 transitions. [2021-01-20 11:34:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:34:28,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:34:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:28,609 INFO L225 Difference]: With dead ends: 38194 [2021-01-20 11:34:28,609 INFO L226 Difference]: Without dead ends: 37830 [2021-01-20 11:34:28,610 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=727, Invalid=2465, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 11:34:28,610 INFO L78 Accepts]: Start accepts. Automaton has 37830 states. Word has length 58 [2021-01-20 11:34:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:28,610 INFO L481 AbstractCegarLoop]: Abstraction has 37830 states. [2021-01-20 11:34:28,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:34:28,610 INFO L276 IsEmpty]: Start isEmpty. Operand 37830 states. [2021-01-20 11:34:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:28,637 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:28,637 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:28,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:28,838 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:28,839 INFO L82 PathProgramCache]: Analyzing trace with hash -947669128, now seen corresponding path program 51 times [2021-01-20 11:34:28,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:28,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095115575] [2021-01-20 11:34:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:29,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095115575] [2021-01-20 11:34:29,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745402578] [2021-01-20 11:34:29,053 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:29,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:34:29,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:29,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:29,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:29,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:29,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:29,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:29,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:29,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37591013] [2021-01-20 11:34:29,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:29,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:29,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:29,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:29,522 INFO L87 Difference]: Start difference. First operand 37830 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:31,679 INFO L93 Difference]: Finished difference Result 38462 states and 85444 transitions. [2021-01-20 11:34:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:34:31,680 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:31,744 INFO L225 Difference]: With dead ends: 38462 [2021-01-20 11:34:31,744 INFO L226 Difference]: Without dead ends: 38310 [2021-01-20 11:34:31,745 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:34:31,745 INFO L78 Accepts]: Start accepts. Automaton has 38310 states. Word has length 58 [2021-01-20 11:34:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:31,745 INFO L481 AbstractCegarLoop]: Abstraction has 38310 states. [2021-01-20 11:34:31,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 38310 states. [2021-01-20 11:34:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:31,781 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:31,781 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:31,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-20 11:34:31,982 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:31,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:31,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1375786594, now seen corresponding path program 52 times [2021-01-20 11:34:31,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:31,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054296209] [2021-01-20 11:34:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:32,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054296209] [2021-01-20 11:34:32,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079105211] [2021-01-20 11:34:32,204 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:32,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:34:32,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:34:32,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:32,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:32,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:32,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:32,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:34:32,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33364186] [2021-01-20 11:34:32,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:34:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:34:32,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:34:32,661 INFO L87 Difference]: Start difference. First operand 38310 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:34:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:35,677 INFO L93 Difference]: Finished difference Result 41044 states and 91467 transitions. [2021-01-20 11:34:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-20 11:34:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:34:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:35,726 INFO L225 Difference]: With dead ends: 41044 [2021-01-20 11:34:35,726 INFO L226 Difference]: Without dead ends: 40680 [2021-01-20 11:34:35,727 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=915, Invalid=3117, Unknown=0, NotChecked=0, Total=4032 [2021-01-20 11:34:35,727 INFO L78 Accepts]: Start accepts. Automaton has 40680 states. Word has length 58 [2021-01-20 11:34:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:35,728 INFO L481 AbstractCegarLoop]: Abstraction has 40680 states. [2021-01-20 11:34:35,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:34:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 40680 states. [2021-01-20 11:34:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:35,768 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:35,768 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:35,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:35,982 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash 507842304, now seen corresponding path program 53 times [2021-01-20 11:34:35,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:35,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896013948] [2021-01-20 11:34:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:36,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896013948] [2021-01-20 11:34:36,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85667117] [2021-01-20 11:34:36,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:36,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:34:36,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:36,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:36,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:36,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:36,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:36,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:36,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:36,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:36,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:36,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:36,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:36,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:36,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179317081] [2021-01-20 11:34:36,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:36,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:36,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:36,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:36,838 INFO L87 Difference]: Start difference. First operand 40680 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:38,874 INFO L93 Difference]: Finished difference Result 40952 states and 91089 transitions. [2021-01-20 11:34:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:34:38,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:38,920 INFO L225 Difference]: With dead ends: 40952 [2021-01-20 11:34:38,921 INFO L226 Difference]: Without dead ends: 40800 [2021-01-20 11:34:38,921 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=616, Invalid=2140, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:34:38,921 INFO L78 Accepts]: Start accepts. Automaton has 40800 states. Word has length 58 [2021-01-20 11:34:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:38,921 INFO L481 AbstractCegarLoop]: Abstraction has 40800 states. [2021-01-20 11:34:38,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 40800 states. [2021-01-20 11:34:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:38,950 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:38,950 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:39,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:39,151 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:39,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2065044128, now seen corresponding path program 54 times [2021-01-20 11:34:39,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:39,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150165161] [2021-01-20 11:34:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:39,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150165161] [2021-01-20 11:34:39,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655742531] [2021-01-20 11:34:39,353 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:39,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:34:39,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:39,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:39,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:39,771 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-01-20 11:34:39,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:39,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:39,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:39,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:39,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:39,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:39,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:39,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:40,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:40,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:40,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495876086] [2021-01-20 11:34:40,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:40,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:40,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:40,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:40,021 INFO L87 Difference]: Start difference. First operand 40800 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:42,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:42,046 INFO L93 Difference]: Finished difference Result 41112 states and 91409 transitions. [2021-01-20 11:34:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 11:34:42,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:42,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:42,096 INFO L225 Difference]: With dead ends: 41112 [2021-01-20 11:34:42,096 INFO L226 Difference]: Without dead ends: 40960 [2021-01-20 11:34:42,096 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=567, Invalid=1883, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 11:34:42,096 INFO L78 Accepts]: Start accepts. Automaton has 40960 states. Word has length 58 [2021-01-20 11:34:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:42,096 INFO L481 AbstractCegarLoop]: Abstraction has 40960 states. [2021-01-20 11:34:42,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 40960 states. [2021-01-20 11:34:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:42,125 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:42,125 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:42,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-20 11:34:42,326 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:42,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:42,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1309043356, now seen corresponding path program 55 times [2021-01-20 11:34:42,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:42,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335369245] [2021-01-20 11:34:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335369245] [2021-01-20 11:34:42,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289404164] [2021-01-20 11:34:42,550 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:42,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:43,060 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-01-20 11:34:43,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:43,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:43,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:34:43,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:43,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:43,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:34:43,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56016262] [2021-01-20 11:34:43,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:34:43,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:34:43,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:34:43,363 INFO L87 Difference]: Start difference. First operand 40960 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:34:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:46,284 INFO L93 Difference]: Finished difference Result 43064 states and 96077 transitions. [2021-01-20 11:34:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:34:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:34:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:46,337 INFO L225 Difference]: With dead ends: 43064 [2021-01-20 11:34:46,337 INFO L226 Difference]: Without dead ends: 42700 [2021-01-20 11:34:46,338 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=768, Invalid=2538, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 11:34:46,338 INFO L78 Accepts]: Start accepts. Automaton has 42700 states. Word has length 58 [2021-01-20 11:34:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:46,338 INFO L481 AbstractCegarLoop]: Abstraction has 42700 states. [2021-01-20 11:34:46,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:34:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 42700 states. [2021-01-20 11:34:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:46,368 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:46,368 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:34:46,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:46,569 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash -597019592, now seen corresponding path program 56 times [2021-01-20 11:34:46,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:46,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126051961] [2021-01-20 11:34:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:46,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126051961] [2021-01-20 11:34:46,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77645688] [2021-01-20 11:34:46,914 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:46,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:34:46,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:46,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:46,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:47,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:47,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:47,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:47,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580297507] [2021-01-20 11:34:47,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:47,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:47,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:47,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:47,345 INFO L87 Difference]: Start difference. First operand 42700 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:48,565 INFO L93 Difference]: Finished difference Result 43132 states and 96019 transitions. [2021-01-20 11:34:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 11:34:48,566 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:48,616 INFO L225 Difference]: With dead ends: 43132 [2021-01-20 11:34:48,616 INFO L226 Difference]: Without dead ends: 42980 [2021-01-20 11:34:48,616 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:34:48,616 INFO L78 Accepts]: Start accepts. Automaton has 42980 states. Word has length 58 [2021-01-20 11:34:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:48,616 INFO L481 AbstractCegarLoop]: Abstraction has 42980 states. [2021-01-20 11:34:48,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 42980 states. [2021-01-20 11:34:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:48,646 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:48,646 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:48,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-20 11:34:48,857 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:48,857 INFO L82 PathProgramCache]: Analyzing trace with hash 931020848, now seen corresponding path program 57 times [2021-01-20 11:34:48,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:48,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25937718] [2021-01-20 11:34:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:49,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25937718] [2021-01-20 11:34:49,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013609875] [2021-01-20 11:34:49,082 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:49,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:34:49,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:49,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:49,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:49,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:49,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:49,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:49,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156358828] [2021-01-20 11:34:49,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:49,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:49,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:49,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:49,530 INFO L87 Difference]: Start difference. First operand 42980 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:50,147 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2021-01-20 11:34:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:51,132 INFO L93 Difference]: Finished difference Result 43812 states and 97507 transitions. [2021-01-20 11:34:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:34:51,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:51,185 INFO L225 Difference]: With dead ends: 43812 [2021-01-20 11:34:51,186 INFO L226 Difference]: Without dead ends: 43420 [2021-01-20 11:34:51,186 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=462, Invalid=1608, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:34:51,186 INFO L78 Accepts]: Start accepts. Automaton has 43420 states. Word has length 58 [2021-01-20 11:34:51,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:51,186 INFO L481 AbstractCegarLoop]: Abstraction has 43420 states. [2021-01-20 11:34:51,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand 43420 states. [2021-01-20 11:34:51,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:51,216 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:51,216 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:51,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-20 11:34:51,417 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:51,418 INFO L82 PathProgramCache]: Analyzing trace with hash -867941462, now seen corresponding path program 58 times [2021-01-20 11:34:51,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:51,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127160906] [2021-01-20 11:34:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:51,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127160906] [2021-01-20 11:34:51,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354659089] [2021-01-20 11:34:51,648 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:51,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:34:51,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:51,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:34:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:52,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:52,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:52,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:52,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667078736] [2021-01-20 11:34:52,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:52,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:52,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:52,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:52,017 INFO L87 Difference]: Start difference. First operand 43420 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:53,586 INFO L93 Difference]: Finished difference Result 44372 states and 98627 transitions. [2021-01-20 11:34:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 11:34:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:53,634 INFO L225 Difference]: With dead ends: 44372 [2021-01-20 11:34:53,634 INFO L226 Difference]: Without dead ends: 43980 [2021-01-20 11:34:53,634 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:34:53,634 INFO L78 Accepts]: Start accepts. Automaton has 43980 states. Word has length 58 [2021-01-20 11:34:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:53,635 INFO L481 AbstractCegarLoop]: Abstraction has 43980 states. [2021-01-20 11:34:53,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 43980 states. [2021-01-20 11:34:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:53,661 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:53,661 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:34:53,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-20 11:34:53,862 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:53,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:53,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1582882476, now seen corresponding path program 59 times [2021-01-20 11:34:53,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:53,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650544348] [2021-01-20 11:34:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:54,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650544348] [2021-01-20 11:34:54,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757489604] [2021-01-20 11:34:54,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:54,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:34:54,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:54,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:54,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:54,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:54,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:54,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:54,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405891208] [2021-01-20 11:34:54,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:54,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:54,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:54,526 INFO L87 Difference]: Start difference. First operand 43980 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:56,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:56,051 INFO L93 Difference]: Finished difference Result 44412 states and 98579 transitions. [2021-01-20 11:34:56,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:34:56,052 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:56,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:56,103 INFO L225 Difference]: With dead ends: 44412 [2021-01-20 11:34:56,103 INFO L226 Difference]: Without dead ends: 44260 [2021-01-20 11:34:56,104 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:34:56,104 INFO L78 Accepts]: Start accepts. Automaton has 44260 states. Word has length 58 [2021-01-20 11:34:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:56,104 INFO L481 AbstractCegarLoop]: Abstraction has 44260 states. [2021-01-20 11:34:56,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 44260 states. [2021-01-20 11:34:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:56,134 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:56,134 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:56,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:56,335 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:56,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:56,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1184044380, now seen corresponding path program 60 times [2021-01-20 11:34:56,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:56,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011955755] [2021-01-20 11:34:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:56,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011955755] [2021-01-20 11:34:56,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126916746] [2021-01-20 11:34:56,762 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:56,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:34:56,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:34:56,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:34:57,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:34:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:57,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:34:57,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:34:57,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257785982] [2021-01-20 11:34:57,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:34:57,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:34:57,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:34:57,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:34:57,202 INFO L87 Difference]: Start difference. First operand 44260 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:34:59,114 INFO L93 Difference]: Finished difference Result 44892 states and 99667 transitions. [2021-01-20 11:34:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 11:34:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:34:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:34:59,169 INFO L225 Difference]: With dead ends: 44892 [2021-01-20 11:34:59,169 INFO L226 Difference]: Without dead ends: 44500 [2021-01-20 11:34:59,169 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=537, Invalid=2013, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 11:34:59,170 INFO L78 Accepts]: Start accepts. Automaton has 44500 states. Word has length 58 [2021-01-20 11:34:59,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:34:59,170 INFO L481 AbstractCegarLoop]: Abstraction has 44500 states. [2021-01-20 11:34:59,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:34:59,170 INFO L276 IsEmpty]: Start isEmpty. Operand 44500 states. [2021-01-20 11:34:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:34:59,200 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:34:59,200 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:34:59,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:59,401 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:34:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:34:59,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1311960606, now seen corresponding path program 61 times [2021-01-20 11:34:59,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:34:59,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073933915] [2021-01-20 11:34:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:34:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:34:59,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073933915] [2021-01-20 11:34:59,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377748674] [2021-01-20 11:34:59,634 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:34:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:34:59,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:34:59,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:00,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:00,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:00,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:00,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678369357] [2021-01-20 11:35:00,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:00,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:00,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:00,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:00,148 INFO L87 Difference]: Start difference. First operand 44500 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:01,717 INFO L93 Difference]: Finished difference Result 44772 states and 99299 transitions. [2021-01-20 11:35:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 11:35:01,718 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:01,768 INFO L225 Difference]: With dead ends: 44772 [2021-01-20 11:35:01,768 INFO L226 Difference]: Without dead ends: 44620 [2021-01-20 11:35:01,769 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:35:01,769 INFO L78 Accepts]: Start accepts. Automaton has 44620 states. Word has length 58 [2021-01-20 11:35:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:01,769 INFO L481 AbstractCegarLoop]: Abstraction has 44620 states. [2021-01-20 11:35:01,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 44620 states. [2021-01-20 11:35:01,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:01,799 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:01,799 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:35:01,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:02,000 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:02,000 INFO L82 PathProgramCache]: Analyzing trace with hash -255638260, now seen corresponding path program 62 times [2021-01-20 11:35:02,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:02,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937950171] [2021-01-20 11:35:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:02,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937950171] [2021-01-20 11:35:02,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707907591] [2021-01-20 11:35:02,214 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:02,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:35:02,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:02,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:02,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:02,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:02,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:02,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:02,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008917879] [2021-01-20 11:35:02,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:02,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:02,640 INFO L87 Difference]: Start difference. First operand 44620 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:03,126 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-01-20 11:35:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:04,667 INFO L93 Difference]: Finished difference Result 45052 states and 99859 transitions. [2021-01-20 11:35:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:35:04,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:04,724 INFO L225 Difference]: With dead ends: 45052 [2021-01-20 11:35:04,725 INFO L226 Difference]: Without dead ends: 44900 [2021-01-20 11:35:04,725 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:35:04,725 INFO L78 Accepts]: Start accepts. Automaton has 44900 states. Word has length 58 [2021-01-20 11:35:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:04,725 INFO L481 AbstractCegarLoop]: Abstraction has 44900 states. [2021-01-20 11:35:04,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 44900 states. [2021-01-20 11:35:04,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:04,756 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:04,756 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:35:04,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:04,958 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:04,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1272402180, now seen corresponding path program 63 times [2021-01-20 11:35:04,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:04,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287404307] [2021-01-20 11:35:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:05,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287404307] [2021-01-20 11:35:05,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922696291] [2021-01-20 11:35:05,197 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:05,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:35:05,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:05,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:05,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:05,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:05,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:05,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87779453] [2021-01-20 11:35:05,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:05,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:05,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:05,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:05,643 INFO L87 Difference]: Start difference. First operand 44900 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:07,708 INFO L93 Difference]: Finished difference Result 45212 states and 100179 transitions. [2021-01-20 11:35:07,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 11:35:07,709 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:07,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:07,764 INFO L225 Difference]: With dead ends: 45212 [2021-01-20 11:35:07,764 INFO L226 Difference]: Without dead ends: 45060 [2021-01-20 11:35:07,765 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 11:35:07,765 INFO L78 Accepts]: Start accepts. Automaton has 45060 states. Word has length 58 [2021-01-20 11:35:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:07,765 INFO L481 AbstractCegarLoop]: Abstraction has 45060 states. [2021-01-20 11:35:07,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 45060 states. [2021-01-20 11:35:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:07,797 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:07,797 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:35:07,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-01-20 11:35:07,998 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash -526560130, now seen corresponding path program 64 times [2021-01-20 11:35:07,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:07,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950189922] [2021-01-20 11:35:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:08,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950189922] [2021-01-20 11:35:08,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601254002] [2021-01-20 11:35:08,225 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:08,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:35:08,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:08,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:35:08,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:08,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:08,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:08,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:08,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79401971] [2021-01-20 11:35:08,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:08,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:08,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:08,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:08,609 INFO L87 Difference]: Start difference. First operand 45060 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:10,623 INFO L93 Difference]: Finished difference Result 45612 states and 101107 transitions. [2021-01-20 11:35:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 11:35:10,625 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:10,678 INFO L225 Difference]: With dead ends: 45612 [2021-01-20 11:35:10,679 INFO L226 Difference]: Without dead ends: 45220 [2021-01-20 11:35:10,679 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=549, Invalid=2103, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:35:10,679 INFO L78 Accepts]: Start accepts. Automaton has 45220 states. Word has length 58 [2021-01-20 11:35:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:10,679 INFO L481 AbstractCegarLoop]: Abstraction has 45220 states. [2021-01-20 11:35:10,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 45220 states. [2021-01-20 11:35:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:10,706 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:10,706 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:35:10,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:10,906 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:10,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:10,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1950977952, now seen corresponding path program 65 times [2021-01-20 11:35:10,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:10,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007777175] [2021-01-20 11:35:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:11,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007777175] [2021-01-20 11:35:11,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768955320] [2021-01-20 11:35:11,130 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:11,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 11:35:11,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:11,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:11,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:11,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:11,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:11,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:11,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482644409] [2021-01-20 11:35:11,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:11,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:11,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:11,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:11,577 INFO L87 Difference]: Start difference. First operand 45220 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:13,464 INFO L93 Difference]: Finished difference Result 45412 states and 100579 transitions. [2021-01-20 11:35:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 11:35:13,465 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:13,515 INFO L225 Difference]: With dead ends: 45412 [2021-01-20 11:35:13,515 INFO L226 Difference]: Without dead ends: 45260 [2021-01-20 11:35:13,515 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=604, Invalid=2048, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 11:35:13,515 INFO L78 Accepts]: Start accepts. Automaton has 45260 states. Word has length 58 [2021-01-20 11:35:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:13,516 INFO L481 AbstractCegarLoop]: Abstraction has 45260 states. [2021-01-20 11:35:13,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 45260 states. [2021-01-20 11:35:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:13,546 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:13,546 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:35:13,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:13,747 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:13,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:13,748 INFO L82 PathProgramCache]: Analyzing trace with hash -422937512, now seen corresponding path program 66 times [2021-01-20 11:35:13,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:13,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546501306] [2021-01-20 11:35:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:14,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546501306] [2021-01-20 11:35:14,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081455081] [2021-01-20 11:35:14,145 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:14,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:35:14,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:14,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:14,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:14,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:14,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:14,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:14,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644297090] [2021-01-20 11:35:14,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:14,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:14,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:14,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:14,590 INFO L87 Difference]: Start difference. First operand 45260 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:16,716 INFO L93 Difference]: Finished difference Result 45572 states and 100899 transitions. [2021-01-20 11:35:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 11:35:16,718 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:16,776 INFO L225 Difference]: With dead ends: 45572 [2021-01-20 11:35:16,776 INFO L226 Difference]: Without dead ends: 45420 [2021-01-20 11:35:16,776 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=629, Invalid=2127, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:35:16,777 INFO L78 Accepts]: Start accepts. Automaton has 45420 states. Word has length 58 [2021-01-20 11:35:16,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:16,778 INFO L481 AbstractCegarLoop]: Abstraction has 45420 states. [2021-01-20 11:35:16,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 45420 states. [2021-01-20 11:35:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:16,809 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:16,809 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:35:17,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:17,010 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:17,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1692565644, now seen corresponding path program 67 times [2021-01-20 11:35:17,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:17,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861402679] [2021-01-20 11:35:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:17,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861402679] [2021-01-20 11:35:17,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874380316] [2021-01-20 11:35:17,236 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:17,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:17,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:17,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:17,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:17,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:17,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090329548] [2021-01-20 11:35:17,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:17,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:17,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:17,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:17,803 INFO L87 Difference]: Start difference. First operand 45420 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:19,795 INFO L93 Difference]: Finished difference Result 45842 states and 101534 transitions. [2021-01-20 11:35:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:35:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:19,851 INFO L225 Difference]: With dead ends: 45842 [2021-01-20 11:35:19,851 INFO L226 Difference]: Without dead ends: 45690 [2021-01-20 11:35:19,851 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:35:19,852 INFO L78 Accepts]: Start accepts. Automaton has 45690 states. Word has length 58 [2021-01-20 11:35:19,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:19,852 INFO L481 AbstractCegarLoop]: Abstraction has 45690 states. [2021-01-20 11:35:19,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:19,852 INFO L276 IsEmpty]: Start isEmpty. Operand 45690 states. [2021-01-20 11:35:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:19,883 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:19,883 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:35:20,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:20,084 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:20,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1846400880, now seen corresponding path program 68 times [2021-01-20 11:35:20,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:20,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882299032] [2021-01-20 11:35:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:20,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882299032] [2021-01-20 11:35:20,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804904109] [2021-01-20 11:35:20,330 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:20,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:35:20,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:20,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:20,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:35:20,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:20,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:20,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:35:20,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143920879] [2021-01-20 11:35:20,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:35:20,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:20,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:35:20,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:35:20,777 INFO L87 Difference]: Start difference. First operand 45690 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:35:21,586 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-01-20 11:35:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:23,416 INFO L93 Difference]: Finished difference Result 48414 states and 107252 transitions. [2021-01-20 11:35:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:35:23,417 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:35:23,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:23,479 INFO L225 Difference]: With dead ends: 48414 [2021-01-20 11:35:23,479 INFO L226 Difference]: Without dead ends: 48050 [2021-01-20 11:35:23,480 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=780, Invalid=2642, Unknown=0, NotChecked=0, Total=3422 [2021-01-20 11:35:23,480 INFO L78 Accepts]: Start accepts. Automaton has 48050 states. Word has length 58 [2021-01-20 11:35:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:23,480 INFO L481 AbstractCegarLoop]: Abstraction has 48050 states. [2021-01-20 11:35:23,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:35:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 48050 states. [2021-01-20 11:35:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:23,512 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:23,512 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:35:23,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-20 11:35:23,727 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:23,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1293670030, now seen corresponding path program 69 times [2021-01-20 11:35:23,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:23,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669430327] [2021-01-20 11:35:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:23,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669430327] [2021-01-20 11:35:23,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603475312] [2021-01-20 11:35:23,974 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:24,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:35:24,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:24,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:24,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:24,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:24,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:24,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:24,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807563537] [2021-01-20 11:35:24,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:24,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:24,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:24,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:24,423 INFO L87 Difference]: Start difference. First operand 48050 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:25,977 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 11 [2021-01-20 11:35:27,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:27,188 INFO L93 Difference]: Finished difference Result 48962 states and 108282 transitions. [2021-01-20 11:35:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-20 11:35:27,189 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:27,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:27,251 INFO L225 Difference]: With dead ends: 48962 [2021-01-20 11:35:27,251 INFO L226 Difference]: Without dead ends: 48570 [2021-01-20 11:35:27,251 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=780, Invalid=2880, Unknown=0, NotChecked=0, Total=3660 [2021-01-20 11:35:27,252 INFO L78 Accepts]: Start accepts. Automaton has 48570 states. Word has length 58 [2021-01-20 11:35:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:27,252 INFO L481 AbstractCegarLoop]: Abstraction has 48570 states. [2021-01-20 11:35:27,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 48570 states. [2021-01-20 11:35:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:27,284 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:27,284 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:35:27,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-20 11:35:27,485 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:27,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1721787496, now seen corresponding path program 70 times [2021-01-20 11:35:27,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:27,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741723999] [2021-01-20 11:35:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:27,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741723999] [2021-01-20 11:35:27,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934534567] [2021-01-20 11:35:27,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:27,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:35:27,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:35:27,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:28,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:35:28,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:28,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:28,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:35:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135281044] [2021-01-20 11:35:28,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:35:28,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:35:28,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:35:28,167 INFO L87 Difference]: Start difference. First operand 48570 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:35:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:31,638 INFO L93 Difference]: Finished difference Result 50214 states and 111232 transitions. [2021-01-20 11:35:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-20 11:35:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:35:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:31,703 INFO L225 Difference]: With dead ends: 50214 [2021-01-20 11:35:31,703 INFO L226 Difference]: Without dead ends: 49850 [2021-01-20 11:35:31,704 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1093, Invalid=3737, Unknown=0, NotChecked=0, Total=4830 [2021-01-20 11:35:31,704 INFO L78 Accepts]: Start accepts. Automaton has 49850 states. Word has length 58 [2021-01-20 11:35:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:31,704 INFO L481 AbstractCegarLoop]: Abstraction has 49850 states. [2021-01-20 11:35:31,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:35:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 49850 states. [2021-01-20 11:35:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:31,736 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:31,736 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:35:31,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:31,937 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:31,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:31,937 INFO L82 PathProgramCache]: Analyzing trace with hash 161841402, now seen corresponding path program 71 times [2021-01-20 11:35:31,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:31,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684002610] [2021-01-20 11:35:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:32,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684002610] [2021-01-20 11:35:32,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449356252] [2021-01-20 11:35:32,165 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:32,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:35:32,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:32,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:32,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:32,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:32,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:32,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:32,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966689426] [2021-01-20 11:35:32,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:32,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:32,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:32,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:32,601 INFO L87 Difference]: Start difference. First operand 49850 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:35,145 INFO L93 Difference]: Finished difference Result 50362 states and 111334 transitions. [2021-01-20 11:35:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 11:35:35,146 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:35,207 INFO L225 Difference]: With dead ends: 50362 [2021-01-20 11:35:35,207 INFO L226 Difference]: Without dead ends: 50210 [2021-01-20 11:35:35,208 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=724, Invalid=2468, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 11:35:35,208 INFO L78 Accepts]: Start accepts. Automaton has 50210 states. Word has length 58 [2021-01-20 11:35:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:35,208 INFO L481 AbstractCegarLoop]: Abstraction has 50210 states. [2021-01-20 11:35:35,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 50210 states. [2021-01-20 11:35:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:35,236 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:35,237 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:35:35,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:35,437 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:35,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1883922266, now seen corresponding path program 72 times [2021-01-20 11:35:35,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:35,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145141660] [2021-01-20 11:35:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:35,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145141660] [2021-01-20 11:35:35,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905934666] [2021-01-20 11:35:35,707 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:35,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:35:35,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:35,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:36,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:36,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:36,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:36,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471139903] [2021-01-20 11:35:36,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:36,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:36,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:36,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:36,150 INFO L87 Difference]: Start difference. First operand 50210 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:39,182 INFO L93 Difference]: Finished difference Result 51590 states and 114172 transitions. [2021-01-20 11:35:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-20 11:35:39,183 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:39,240 INFO L225 Difference]: With dead ends: 51590 [2021-01-20 11:35:39,240 INFO L226 Difference]: Without dead ends: 51110 [2021-01-20 11:35:39,240 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=887, Invalid=3273, Unknown=0, NotChecked=0, Total=4160 [2021-01-20 11:35:39,240 INFO L78 Accepts]: Start accepts. Automaton has 51110 states. Word has length 58 [2021-01-20 11:35:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:39,241 INFO L481 AbstractCegarLoop]: Abstraction has 51110 states. [2021-01-20 11:35:39,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 51110 states. [2021-01-20 11:35:39,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:39,269 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:39,269 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:35:39,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:39,470 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:39,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:39,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1655044258, now seen corresponding path program 73 times [2021-01-20 11:35:39,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:39,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30264152] [2021-01-20 11:35:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:39,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30264152] [2021-01-20 11:35:39,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885428087] [2021-01-20 11:35:39,714 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:39,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:39,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:40,033 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:35:40,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:40,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:40,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:35:40,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142040385] [2021-01-20 11:35:40,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:35:40,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:40,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:35:40,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:35:40,060 INFO L87 Difference]: Start difference. First operand 51110 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:35:43,191 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-01-20 11:35:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:43,374 INFO L93 Difference]: Finished difference Result 55174 states and 122104 transitions. [2021-01-20 11:35:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-20 11:35:43,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:35:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:43,441 INFO L225 Difference]: With dead ends: 55174 [2021-01-20 11:35:43,441 INFO L226 Difference]: Without dead ends: 54640 [2021-01-20 11:35:43,441 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1097, Invalid=3873, Unknown=0, NotChecked=0, Total=4970 [2021-01-20 11:35:43,441 INFO L78 Accepts]: Start accepts. Automaton has 54640 states. Word has length 58 [2021-01-20 11:35:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:43,442 INFO L481 AbstractCegarLoop]: Abstraction has 54640 states. [2021-01-20 11:35:43,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:35:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 54640 states. [2021-01-20 11:35:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:43,472 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:43,472 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:35:43,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:43,673 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:43,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:43,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1791249794, now seen corresponding path program 74 times [2021-01-20 11:35:43,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:43,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496915544] [2021-01-20 11:35:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:43,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496915544] [2021-01-20 11:35:43,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362120599] [2021-01-20 11:35:43,919 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:43,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:35:43,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:43,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:43,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:44,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:44,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:44,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:44,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:44,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:44,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881143453] [2021-01-20 11:35:44,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:44,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:44,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:44,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:44,418 INFO L87 Difference]: Start difference. First operand 54640 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:46,997 INFO L93 Difference]: Finished difference Result 55432 states and 122329 transitions. [2021-01-20 11:35:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 11:35:46,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:47,069 INFO L225 Difference]: With dead ends: 55432 [2021-01-20 11:35:47,069 INFO L226 Difference]: Without dead ends: 55280 [2021-01-20 11:35:47,070 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 11:35:47,070 INFO L78 Accepts]: Start accepts. Automaton has 55280 states. Word has length 58 [2021-01-20 11:35:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:47,070 INFO L481 AbstractCegarLoop]: Abstraction has 55280 states. [2021-01-20 11:35:47,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 55280 states. [2021-01-20 11:35:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:47,268 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:47,268 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:35:47,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:47,474 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:47,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1035249022, now seen corresponding path program 75 times [2021-01-20 11:35:47,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:47,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693578750] [2021-01-20 11:35:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:47,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693578750] [2021-01-20 11:35:47,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729343335] [2021-01-20 11:35:47,713 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:47,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 11:35:47,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:48,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:35:48,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:35:48,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:35:48,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:48,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:48,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:35:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641153533] [2021-01-20 11:35:48,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:35:48,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:35:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:35:48,247 INFO L87 Difference]: Start difference. First operand 55280 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:35:51,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:51,907 INFO L93 Difference]: Finished difference Result 57294 states and 126532 transitions. [2021-01-20 11:35:51,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-20 11:35:51,908 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:35:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:51,970 INFO L225 Difference]: With dead ends: 57294 [2021-01-20 11:35:51,971 INFO L226 Difference]: Without dead ends: 56930 [2021-01-20 11:35:51,971 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2021-01-20 11:35:51,971 INFO L78 Accepts]: Start accepts. Automaton has 56930 states. Word has length 58 [2021-01-20 11:35:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:51,971 INFO L481 AbstractCegarLoop]: Abstraction has 56930 states. [2021-01-20 11:35:51,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:35:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 56930 states. [2021-01-20 11:35:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:52,000 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:52,000 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:35:52,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:52,200 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:52,201 INFO L82 PathProgramCache]: Analyzing trace with hash -313056756, now seen corresponding path program 76 times [2021-01-20 11:35:52,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:52,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375594740] [2021-01-20 11:35:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:52,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375594740] [2021-01-20 11:35:52,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032194054] [2021-01-20 11:35:52,476 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:52,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:35:52,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:52,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:35:52,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:52,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:52,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:52,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:52,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:52,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545831748] [2021-01-20 11:35:52,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:52,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:52,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:52,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:52,905 INFO L87 Difference]: Start difference. First operand 56930 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:56,575 INFO L93 Difference]: Finished difference Result 60276 states and 133483 transitions. [2021-01-20 11:35:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-20 11:35:56,577 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:56,657 INFO L225 Difference]: With dead ends: 60276 [2021-01-20 11:35:56,657 INFO L226 Difference]: Without dead ends: 59460 [2021-01-20 11:35:56,657 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2021-01-20 11:35:56,657 INFO L78 Accepts]: Start accepts. Automaton has 59460 states. Word has length 58 [2021-01-20 11:35:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:56,658 INFO L481 AbstractCegarLoop]: Abstraction has 59460 states. [2021-01-20 11:35:56,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 59460 states. [2021-01-20 11:35:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:56,876 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:56,876 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:35:57,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:57,082 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:57,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:57,083 INFO L82 PathProgramCache]: Analyzing trace with hash 828546426, now seen corresponding path program 77 times [2021-01-20 11:35:57,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:57,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202433088] [2021-01-20 11:35:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:57,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202433088] [2021-01-20 11:35:57,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552364474] [2021-01-20 11:35:57,328 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:57,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:35:57,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:57,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:57,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:35:57,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:57,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:57,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:35:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:57,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:35:57,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:35:57,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603048715] [2021-01-20 11:35:57,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:35:57,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:35:57,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:35:57,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:35:57,810 INFO L87 Difference]: Start difference. First operand 59460 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:58,572 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 12 [2021-01-20 11:35:59,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:35:59,165 INFO L93 Difference]: Finished difference Result 60212 states and 132839 transitions. [2021-01-20 11:35:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:35:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:35:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:35:59,245 INFO L225 Difference]: With dead ends: 60212 [2021-01-20 11:35:59,245 INFO L226 Difference]: Without dead ends: 60060 [2021-01-20 11:35:59,245 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 11:35:59,245 INFO L78 Accepts]: Start accepts. Automaton has 60060 states. Word has length 58 [2021-01-20 11:35:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:35:59,246 INFO L481 AbstractCegarLoop]: Abstraction has 60060 states. [2021-01-20 11:35:59,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:35:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 60060 states. [2021-01-20 11:35:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:35:59,280 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:35:59,280 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:35:59,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-01-20 11:35:59,481 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:35:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:35:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1760184768, now seen corresponding path program 78 times [2021-01-20 11:35:59,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:35:59,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311630883] [2021-01-20 11:35:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:35:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:35:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:35:59,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311630883] [2021-01-20 11:35:59,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652736967] [2021-01-20 11:35:59,747 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:35:59,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:35:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:35:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:35:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:00,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:00,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:00,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432447530] [2021-01-20 11:36:00,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:00,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:00,165 INFO L87 Difference]: Start difference. First operand 60060 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:01,451 INFO L93 Difference]: Finished difference Result 60612 states and 133639 transitions. [2021-01-20 11:36:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 11:36:01,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:01,564 INFO L225 Difference]: With dead ends: 60612 [2021-01-20 11:36:01,564 INFO L226 Difference]: Without dead ends: 60460 [2021-01-20 11:36:01,564 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 11:36:01,565 INFO L78 Accepts]: Start accepts. Automaton has 60460 states. Word has length 58 [2021-01-20 11:36:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:01,566 INFO L481 AbstractCegarLoop]: Abstraction has 60460 states. [2021-01-20 11:36:01,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 60460 states. [2021-01-20 11:36:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:01,617 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:01,617 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:01,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:01,831 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:01,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:01,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1845470330, now seen corresponding path program 79 times [2021-01-20 11:36:01,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:01,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555575931] [2021-01-20 11:36:01,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:02,215 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 11:36:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:02,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555575931] [2021-01-20 11:36:02,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986680299] [2021-01-20 11:36:02,226 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:02,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:02,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:02,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:02,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:02,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:02,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:02,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871832531] [2021-01-20 11:36:02,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:02,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:02,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:02,703 INFO L87 Difference]: Start difference. First operand 60460 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:04,254 INFO L93 Difference]: Finished difference Result 61052 states and 134519 transitions. [2021-01-20 11:36:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:36:04,256 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:04,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:04,356 INFO L225 Difference]: With dead ends: 61052 [2021-01-20 11:36:04,356 INFO L226 Difference]: Without dead ends: 60900 [2021-01-20 11:36:04,357 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:36:04,357 INFO L78 Accepts]: Start accepts. Automaton has 60900 states. Word has length 58 [2021-01-20 11:36:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:04,357 INFO L481 AbstractCegarLoop]: Abstraction has 60900 states. [2021-01-20 11:36:04,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 60900 states. [2021-01-20 11:36:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:04,403 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:04,404 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:04,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-01-20 11:36:04,619 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:04,620 INFO L82 PathProgramCache]: Analyzing trace with hash -139234228, now seen corresponding path program 80 times [2021-01-20 11:36:04,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:04,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154196875] [2021-01-20 11:36:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:04,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154196875] [2021-01-20 11:36:04,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179360957] [2021-01-20 11:36:04,853 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:04,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:36:04,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:04,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:04,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:05,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:05,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:05,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:05,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514823104] [2021-01-20 11:36:05,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:05,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:05,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:05,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:05,343 INFO L87 Difference]: Start difference. First operand 60900 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:06,221 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-01-20 11:36:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:06,789 INFO L93 Difference]: Finished difference Result 61332 states and 135079 transitions. [2021-01-20 11:36:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:36:06,790 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:06,883 INFO L225 Difference]: With dead ends: 61332 [2021-01-20 11:36:06,884 INFO L226 Difference]: Without dead ends: 61180 [2021-01-20 11:36:06,884 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=1151, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 11:36:06,884 INFO L78 Accepts]: Start accepts. Automaton has 61180 states. Word has length 58 [2021-01-20 11:36:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:06,884 INFO L481 AbstractCegarLoop]: Abstraction has 61180 states. [2021-01-20 11:36:06,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:06,885 INFO L276 IsEmpty]: Start isEmpty. Operand 61180 states. [2021-01-20 11:36:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:06,928 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:06,928 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:07,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:07,142 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:07,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:07,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1544097498, now seen corresponding path program 81 times [2021-01-20 11:36:07,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:07,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613326822] [2021-01-20 11:36:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:07,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613326822] [2021-01-20 11:36:07,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894398725] [2021-01-20 11:36:07,362 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:07,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:36:07,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:07,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:07,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:07,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:07,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:07,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:07,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:07,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270868568] [2021-01-20 11:36:07,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:07,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:07,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:07,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:07,993 INFO L87 Difference]: Start difference. First operand 61180 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:09,345 INFO L93 Difference]: Finished difference Result 61532 states and 135479 transitions. [2021-01-20 11:36:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:36:09,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:09,624 INFO L225 Difference]: With dead ends: 61532 [2021-01-20 11:36:09,624 INFO L226 Difference]: Without dead ends: 61380 [2021-01-20 11:36:09,625 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:36:09,625 INFO L78 Accepts]: Start accepts. Automaton has 61380 states. Word has length 58 [2021-01-20 11:36:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:09,625 INFO L481 AbstractCegarLoop]: Abstraction has 61380 states. [2021-01-20 11:36:09,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 61380 states. [2021-01-20 11:36:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:09,664 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:09,664 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:09,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-20 11:36:09,877 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:09,878 INFO L82 PathProgramCache]: Analyzing trace with hash 162138604, now seen corresponding path program 82 times [2021-01-20 11:36:09,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:09,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128927312] [2021-01-20 11:36:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:10,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128927312] [2021-01-20 11:36:10,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288223878] [2021-01-20 11:36:10,115 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:10,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:36:10,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:36:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:10,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:10,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:10,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:10,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457516211] [2021-01-20 11:36:10,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:10,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:10,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:10,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:10,514 INFO L87 Difference]: Start difference. First operand 61380 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:11,996 INFO L93 Difference]: Finished difference Result 61572 states and 135559 transitions. [2021-01-20 11:36:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 11:36:11,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:12,074 INFO L225 Difference]: With dead ends: 61572 [2021-01-20 11:36:12,074 INFO L226 Difference]: Without dead ends: 61420 [2021-01-20 11:36:12,074 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:36:12,074 INFO L78 Accepts]: Start accepts. Automaton has 61420 states. Word has length 58 [2021-01-20 11:36:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:12,074 INFO L481 AbstractCegarLoop]: Abstraction has 61420 states. [2021-01-20 11:36:12,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 61420 states. [2021-01-20 11:36:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:12,107 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:12,107 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:12,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-20 11:36:12,308 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash -660751790, now seen corresponding path program 83 times [2021-01-20 11:36:12,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:12,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319240319] [2021-01-20 11:36:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:12,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319240319] [2021-01-20 11:36:12,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029468782] [2021-01-20 11:36:12,551 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:12,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:36:12,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:12,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:12,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:12,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:12,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:12,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:13,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:13,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:13,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602684363] [2021-01-20 11:36:13,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:13,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:13,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:13,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:13,079 INFO L87 Difference]: Start difference. First operand 61420 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:15,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:15,042 INFO L93 Difference]: Finished difference Result 61772 states and 135959 transitions. [2021-01-20 11:36:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 11:36:15,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:15,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:15,157 INFO L225 Difference]: With dead ends: 61772 [2021-01-20 11:36:15,157 INFO L226 Difference]: Without dead ends: 61620 [2021-01-20 11:36:15,158 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=414, Invalid=1478, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:36:15,158 INFO L78 Accepts]: Start accepts. Automaton has 61620 states. Word has length 58 [2021-01-20 11:36:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:15,158 INFO L481 AbstractCegarLoop]: Abstraction has 61620 states. [2021-01-20 11:36:15,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 61620 states. [2021-01-20 11:36:15,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:15,211 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:15,211 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:15,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-01-20 11:36:15,426 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:15,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:15,427 INFO L82 PathProgramCache]: Analyzing trace with hash 384183672, now seen corresponding path program 84 times [2021-01-20 11:36:15,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:15,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135545012] [2021-01-20 11:36:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:15,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135545012] [2021-01-20 11:36:15,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794265590] [2021-01-20 11:36:15,818 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:15,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:36:15,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:15,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:15,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:16,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:16,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:16,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:16,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:16,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:16,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079646031] [2021-01-20 11:36:16,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:16,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:16,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:16,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:16,540 INFO L87 Difference]: Start difference. First operand 61620 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:18,668 INFO L93 Difference]: Finished difference Result 61972 states and 136359 transitions. [2021-01-20 11:36:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:36:18,670 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:18,952 INFO L225 Difference]: With dead ends: 61972 [2021-01-20 11:36:18,952 INFO L226 Difference]: Without dead ends: 61820 [2021-01-20 11:36:18,953 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 11:36:18,953 INFO L78 Accepts]: Start accepts. Automaton has 61820 states. Word has length 58 [2021-01-20 11:36:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:18,954 INFO L481 AbstractCegarLoop]: Abstraction has 61820 states. [2021-01-20 11:36:18,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 61820 states. [2021-01-20 11:36:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:18,998 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:18,998 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:19,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:19,213 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1097274800, now seen corresponding path program 85 times [2021-01-20 11:36:19,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:19,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101929795] [2021-01-20 11:36:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101929795] [2021-01-20 11:36:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410956817] [2021-01-20 11:36:19,494 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:19,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:19,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:19,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:19,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:19,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:19,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:19,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:19,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478111952] [2021-01-20 11:36:19,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:19,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:19,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:19,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:19,988 INFO L87 Difference]: Start difference. First operand 61820 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:21,792 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-01-20 11:36:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:22,319 INFO L93 Difference]: Finished difference Result 62172 states and 136759 transitions. [2021-01-20 11:36:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 11:36:22,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:22,414 INFO L225 Difference]: With dead ends: 62172 [2021-01-20 11:36:22,414 INFO L226 Difference]: Without dead ends: 62020 [2021-01-20 11:36:22,414 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=646, Invalid=2216, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 11:36:22,414 INFO L78 Accepts]: Start accepts. Automaton has 62020 states. Word has length 58 [2021-01-20 11:36:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:22,415 INFO L481 AbstractCegarLoop]: Abstraction has 62020 states. [2021-01-20 11:36:22,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:22,415 INFO L276 IsEmpty]: Start isEmpty. Operand 62020 states. [2021-01-20 11:36:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:22,457 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:22,459 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:22,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-01-20 11:36:22,672 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:22,673 INFO L82 PathProgramCache]: Analyzing trace with hash 669157334, now seen corresponding path program 86 times [2021-01-20 11:36:22,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:22,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067510285] [2021-01-20 11:36:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:22,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067510285] [2021-01-20 11:36:22,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831867893] [2021-01-20 11:36:22,945 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:23,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:36:23,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:23,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:23,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:23,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:36:23,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:23,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:23,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:36:23,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880321190] [2021-01-20 11:36:23,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:36:23,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:23,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:36:23,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:36:23,530 INFO L87 Difference]: Start difference. First operand 62020 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:36:24,573 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 9 [2021-01-20 11:36:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:26,560 INFO L93 Difference]: Finished difference Result 65184 states and 143737 transitions. [2021-01-20 11:36:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-20 11:36:26,562 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:36:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:26,642 INFO L225 Difference]: With dead ends: 65184 [2021-01-20 11:36:26,642 INFO L226 Difference]: Without dead ends: 64820 [2021-01-20 11:36:26,643 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=929, Invalid=3361, Unknown=0, NotChecked=0, Total=4290 [2021-01-20 11:36:26,643 INFO L78 Accepts]: Start accepts. Automaton has 64820 states. Word has length 58 [2021-01-20 11:36:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:26,643 INFO L481 AbstractCegarLoop]: Abstraction has 64820 states. [2021-01-20 11:36:26,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:36:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 64820 states. [2021-01-20 11:36:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:26,679 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:26,679 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:26,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:26,880 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:26,881 INFO L82 PathProgramCache]: Analyzing trace with hash 779504368, now seen corresponding path program 87 times [2021-01-20 11:36:26,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:26,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270767997] [2021-01-20 11:36:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:27,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270767997] [2021-01-20 11:36:27,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997793308] [2021-01-20 11:36:27,306 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:27,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 11:36:27,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:27,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:27,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:27,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:27,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:27,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115823153] [2021-01-20 11:36:27,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:27,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:27,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:27,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:27,737 INFO L87 Difference]: Start difference. First operand 64820 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:29,654 INFO L93 Difference]: Finished difference Result 65612 states and 144399 transitions. [2021-01-20 11:36:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:36:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:29,781 INFO L225 Difference]: With dead ends: 65612 [2021-01-20 11:36:29,781 INFO L226 Difference]: Without dead ends: 65460 [2021-01-20 11:36:29,781 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=463, Invalid=1517, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 11:36:29,782 INFO L78 Accepts]: Start accepts. Automaton has 65460 states. Word has length 58 [2021-01-20 11:36:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:29,782 INFO L481 AbstractCegarLoop]: Abstraction has 65460 states. [2021-01-20 11:36:29,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 65460 states. [2021-01-20 11:36:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:29,845 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:29,845 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:30,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-01-20 11:36:30,059 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash -973248368, now seen corresponding path program 88 times [2021-01-20 11:36:30,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:30,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335926755] [2021-01-20 11:36:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:30,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335926755] [2021-01-20 11:36:30,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905843488] [2021-01-20 11:36:30,332 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:30,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:36:30,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:30,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 11:36:30,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:30,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:30,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:30,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:30,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837819377] [2021-01-20 11:36:30,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:30,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:30,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:30,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:30,804 INFO L87 Difference]: Start difference. First operand 65460 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:33,080 INFO L93 Difference]: Finished difference Result 65852 states and 144879 transitions. [2021-01-20 11:36:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 11:36:33,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:33,196 INFO L225 Difference]: With dead ends: 65852 [2021-01-20 11:36:33,196 INFO L226 Difference]: Without dead ends: 65700 [2021-01-20 11:36:33,197 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:36:33,197 INFO L78 Accepts]: Start accepts. Automaton has 65700 states. Word has length 58 [2021-01-20 11:36:33,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:33,197 INFO L481 AbstractCegarLoop]: Abstraction has 65700 states. [2021-01-20 11:36:33,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 65700 states. [2021-01-20 11:36:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:33,248 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:33,248 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:36:33,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:33,462 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:33,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:33,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1142254788, now seen corresponding path program 89 times [2021-01-20 11:36:33,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:33,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490659946] [2021-01-20 11:36:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:33,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490659946] [2021-01-20 11:36:33,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21495694] [2021-01-20 11:36:33,764 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:33,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 11:36:33,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:33,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:34,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:34,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:34,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:34,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145899242] [2021-01-20 11:36:34,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:34,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:34,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:34,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:34,222 INFO L87 Difference]: Start difference. First operand 65700 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:35,658 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-01-20 11:36:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:36,421 INFO L93 Difference]: Finished difference Result 66972 states and 147119 transitions. [2021-01-20 11:36:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 11:36:36,423 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:36,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:36,525 INFO L225 Difference]: With dead ends: 66972 [2021-01-20 11:36:36,525 INFO L226 Difference]: Without dead ends: 66820 [2021-01-20 11:36:36,526 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:36:36,526 INFO L78 Accepts]: Start accepts. Automaton has 66820 states. Word has length 58 [2021-01-20 11:36:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:36,526 INFO L481 AbstractCegarLoop]: Abstraction has 66820 states. [2021-01-20 11:36:36,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 66820 states. [2021-01-20 11:36:36,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:36,572 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:36,572 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-01-20 11:36:36,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:36,786 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:36,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:36,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1898255560, now seen corresponding path program 90 times [2021-01-20 11:36:36,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:36,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788124373] [2021-01-20 11:36:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:37,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788124373] [2021-01-20 11:36:37,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223222876] [2021-01-20 11:36:37,038 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:37,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 11:36:37,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:37,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:37,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:37,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:36:37,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:37,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:37,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:36:37,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753282757] [2021-01-20 11:36:37,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:36:37,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:37,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:36:37,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:36:37,701 INFO L87 Difference]: Start difference. First operand 66820 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:36:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:40,434 INFO L93 Difference]: Finished difference Result 69664 states and 153457 transitions. [2021-01-20 11:36:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 11:36:40,436 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:36:40,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:40,538 INFO L225 Difference]: With dead ends: 69664 [2021-01-20 11:36:40,538 INFO L226 Difference]: Without dead ends: 69300 [2021-01-20 11:36:40,539 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=801, Invalid=2621, Unknown=0, NotChecked=0, Total=3422 [2021-01-20 11:36:40,539 INFO L78 Accepts]: Start accepts. Automaton has 69300 states. Word has length 58 [2021-01-20 11:36:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:40,539 INFO L481 AbstractCegarLoop]: Abstraction has 69300 states. [2021-01-20 11:36:40,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:36:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 69300 states. [2021-01-20 11:36:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:40,581 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:40,582 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:40,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-01-20 11:36:40,795 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:40,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1843980886, now seen corresponding path program 91 times [2021-01-20 11:36:40,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:40,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374142024] [2021-01-20 11:36:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:41,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374142024] [2021-01-20 11:36:41,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871563039] [2021-01-20 11:36:41,046 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:41,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:41,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:41,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:41,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 11:36:41,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334879560] [2021-01-20 11:36:41,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 11:36:41,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:41,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 11:36:41,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-20 11:36:41,462 INFO L87 Difference]: Start difference. First operand 69300 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:43,809 INFO L93 Difference]: Finished difference Result 69692 states and 153319 transitions. [2021-01-20 11:36:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 11:36:43,810 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 11:36:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:43,905 INFO L225 Difference]: With dead ends: 69692 [2021-01-20 11:36:43,905 INFO L226 Difference]: Without dead ends: 69540 [2021-01-20 11:36:43,906 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 11:36:43,906 INFO L78 Accepts]: Start accepts. Automaton has 69540 states. Word has length 58 [2021-01-20 11:36:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:43,906 INFO L481 AbstractCegarLoop]: Abstraction has 69540 states. [2021-01-20 11:36:43,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 11:36:43,906 INFO L276 IsEmpty]: Start isEmpty. Operand 69540 states. [2021-01-20 11:36:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 11:36:43,944 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:43,944 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 11:36:44,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-01-20 11:36:44,145 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:44,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2022868944, now seen corresponding path program 92 times [2021-01-20 11:36:44,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:44,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491557724] [2021-01-20 11:36:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:44,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491557724] [2021-01-20 11:36:44,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740899842] [2021-01-20 11:36:44,430 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:44,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:36:44,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:44,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 11:36:44,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:44,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:36:44,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:44,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:44,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 11:36:44,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875311479] [2021-01-20 11:36:44,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:36:44,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:44,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:36:44,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:36:44,816 INFO L87 Difference]: Start difference. First operand 69540 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:36:45,236 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-01-20 11:36:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:48,208 INFO L93 Difference]: Finished difference Result 72194 states and 159182 transitions. [2021-01-20 11:36:48,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-20 11:36:48,210 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 11:36:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:48,318 INFO L225 Difference]: With dead ends: 72194 [2021-01-20 11:36:48,318 INFO L226 Difference]: Without dead ends: 71830 [2021-01-20 11:36:48,319 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1444 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=989, Invalid=3301, Unknown=0, NotChecked=0, Total=4290 [2021-01-20 11:36:48,319 INFO L78 Accepts]: Start accepts. Automaton has 71830 states. Word has length 58 [2021-01-20 11:36:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:48,319 INFO L481 AbstractCegarLoop]: Abstraction has 71830 states. [2021-01-20 11:36:48,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 11:36:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 71830 states. [2021-01-20 11:36:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:36:48,390 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:48,390 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:48,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:48,604 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1735535381, now seen corresponding path program 9 times [2021-01-20 11:36:48,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:48,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608911894] [2021-01-20 11:36:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:48,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608911894] [2021-01-20 11:36:48,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719877162] [2021-01-20 11:36:48,886 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:48,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 11:36:48,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:48,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 11:36:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:49,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:49,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:49,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-01-20 11:36:49,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131752026] [2021-01-20 11:36:49,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 11:36:49,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:49,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 11:36:49,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-20 11:36:49,075 INFO L87 Difference]: Start difference. First operand 71830 states. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:50,020 INFO L93 Difference]: Finished difference Result 72022 states and 158644 transitions. [2021-01-20 11:36:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 11:36:50,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:36:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:50,165 INFO L225 Difference]: With dead ends: 72022 [2021-01-20 11:36:50,165 INFO L226 Difference]: Without dead ends: 71870 [2021-01-20 11:36:50,167 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-01-20 11:36:50,167 INFO L78 Accepts]: Start accepts. Automaton has 71870 states. Word has length 63 [2021-01-20 11:36:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:50,167 INFO L481 AbstractCegarLoop]: Abstraction has 71870 states. [2021-01-20 11:36:50,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:50,168 INFO L276 IsEmpty]: Start isEmpty. Operand 71870 states. [2021-01-20 11:36:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:36:50,261 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:50,263 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:36:50,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-01-20 11:36:50,477 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:50,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:50,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1555465405, now seen corresponding path program 10 times [2021-01-20 11:36:50,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:50,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042935712] [2021-01-20 11:36:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:50,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042935712] [2021-01-20 11:36:50,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644395746] [2021-01-20 11:36:50,816 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:50,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:36:50,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:36:50,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:51,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:36:51,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:51,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:51,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:36:51,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655100241] [2021-01-20 11:36:51,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:36:51,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:51,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:36:51,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:36:51,423 INFO L87 Difference]: Start difference. First operand 71870 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:53,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:53,644 INFO L93 Difference]: Finished difference Result 72910 states and 160932 transitions. [2021-01-20 11:36:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:36:53,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:36:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:53,766 INFO L225 Difference]: With dead ends: 72910 [2021-01-20 11:36:53,767 INFO L226 Difference]: Without dead ends: 72370 [2021-01-20 11:36:53,770 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 11:36:53,770 INFO L78 Accepts]: Start accepts. Automaton has 72370 states. Word has length 63 [2021-01-20 11:36:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:53,770 INFO L481 AbstractCegarLoop]: Abstraction has 72370 states. [2021-01-20 11:36:53,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 72370 states. [2021-01-20 11:36:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:36:53,844 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:53,844 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:36:54,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-01-20 11:36:54,057 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1241373133, now seen corresponding path program 93 times [2021-01-20 11:36:54,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:54,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130275999] [2021-01-20 11:36:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:54,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130275999] [2021-01-20 11:36:54,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665589317] [2021-01-20 11:36:54,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:54,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:36:54,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:54,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:36:54,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:54,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:54,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:54,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:55,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:55,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:36:55,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159992176] [2021-01-20 11:36:55,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:36:55,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:55,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:36:55,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:36:55,184 INFO L87 Difference]: Start difference. First operand 72370 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:36:56,835 INFO L93 Difference]: Finished difference Result 72682 states and 160154 transitions. [2021-01-20 11:36:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 11:36:56,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:36:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:36:56,959 INFO L225 Difference]: With dead ends: 72682 [2021-01-20 11:36:56,960 INFO L226 Difference]: Without dead ends: 72530 [2021-01-20 11:36:56,960 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=371, Invalid=1269, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 11:36:56,960 INFO L78 Accepts]: Start accepts. Automaton has 72530 states. Word has length 63 [2021-01-20 11:36:56,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:36:56,960 INFO L481 AbstractCegarLoop]: Abstraction has 72530 states. [2021-01-20 11:36:56,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:36:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 72530 states. [2021-01-20 11:36:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:36:57,275 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:36:57,276 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:36:57,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-01-20 11:36:57,476 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:36:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:36:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1784254887, now seen corresponding path program 94 times [2021-01-20 11:36:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:36:57,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979556253] [2021-01-20 11:36:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:36:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:36:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:57,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979556253] [2021-01-20 11:36:57,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212306379] [2021-01-20 11:36:57,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:36:57,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:36:57,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:36:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:36:57,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:36:58,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:58,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:58,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:58,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:58,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:58,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:58,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:58,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:36:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:36:58,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:36:58,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:36:58,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567102137] [2021-01-20 11:36:58,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:36:58,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:36:58,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:36:58,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:36:58,477 INFO L87 Difference]: Start difference. First operand 72530 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:00,450 INFO L93 Difference]: Finished difference Result 72842 states and 160474 transitions. [2021-01-20 11:37:00,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 11:37:00,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:37:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:00,540 INFO L225 Difference]: With dead ends: 72842 [2021-01-20 11:37:00,540 INFO L226 Difference]: Without dead ends: 72690 [2021-01-20 11:37:00,540 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 11:37:00,540 INFO L78 Accepts]: Start accepts. Automaton has 72690 states. Word has length 63 [2021-01-20 11:37:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:00,540 INFO L481 AbstractCegarLoop]: Abstraction has 72690 states. [2021-01-20 11:37:00,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 72690 states. [2021-01-20 11:37:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:37:00,595 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:00,595 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:37:00,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:00,796 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:00,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:00,796 INFO L82 PathProgramCache]: Analyzing trace with hash -788631545, now seen corresponding path program 95 times [2021-01-20 11:37:00,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:00,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010405193] [2021-01-20 11:37:00,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:01,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010405193] [2021-01-20 11:37:01,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723352739] [2021-01-20 11:37:01,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:01,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:37:01,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:01,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:37:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:01,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:01,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:01,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:01,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:01,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:37:01,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454334631] [2021-01-20 11:37:01,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:37:01,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:01,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:37:01,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:37:01,700 INFO L87 Difference]: Start difference. First operand 72690 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:37:04,303 INFO L93 Difference]: Finished difference Result 72882 states and 160554 transitions. [2021-01-20 11:37:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 11:37:04,305 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:37:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:37:04,430 INFO L225 Difference]: With dead ends: 72882 [2021-01-20 11:37:04,430 INFO L226 Difference]: Without dead ends: 72730 [2021-01-20 11:37:04,431 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=499, Invalid=1757, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 11:37:04,431 INFO L78 Accepts]: Start accepts. Automaton has 72730 states. Word has length 63 [2021-01-20 11:37:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:37:04,431 INFO L481 AbstractCegarLoop]: Abstraction has 72730 states. [2021-01-20 11:37:04,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 72730 states. [2021-01-20 11:37:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:37:04,512 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:37:04,512 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:37:04,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-01-20 11:37:04,727 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:37:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:37:04,728 INFO L82 PathProgramCache]: Analyzing trace with hash -32630773, now seen corresponding path program 96 times [2021-01-20 11:37:04,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:37:04,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699533737] [2021-01-20 11:37:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:37:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:37:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:05,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699533737] [2021-01-20 11:37:05,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192466097] [2021-01-20 11:37:05,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:37:05,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 11:37:05,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:37:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:37:05,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:37:05,673 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-20 11:37:05,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:37:06,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:37:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:37:06,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:37:06,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:37:06,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217491835] [2021-01-20 11:37:06,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:37:06,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:37:06,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:37:06,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:37:06,050 INFO L87 Difference]: Start difference. First operand 72730 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:37:20,736 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-01-20 11:37:26,903 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-01-20 11:38:37,244 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2021-01-20 11:39:16,417 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-01-20 11:39:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:39:22,736 INFO L93 Difference]: Finished difference Result 74770 states and 164842 transitions. [2021-01-20 11:39:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-20 11:39:22,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:39:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:39:22,851 INFO L225 Difference]: With dead ends: 74770 [2021-01-20 11:39:22,851 INFO L226 Difference]: Without dead ends: 74230 [2021-01-20 11:39:22,853 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=855, Invalid=3292, Unknown=13, NotChecked=0, Total=4160 [2021-01-20 11:39:22,853 INFO L78 Accepts]: Start accepts. Automaton has 74230 states. Word has length 63 [2021-01-20 11:39:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:39:22,853 INFO L481 AbstractCegarLoop]: Abstraction has 74230 states. [2021-01-20 11:39:22,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 74230 states. [2021-01-20 11:39:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:39:22,917 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:39:22,918 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:39:23,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-01-20 11:39:23,118 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:39:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:39:23,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1863343861, now seen corresponding path program 97 times [2021-01-20 11:39:23,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:39:23,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118175943] [2021-01-20 11:39:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:39:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:23,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118175943] [2021-01-20 11:39:23,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125496878] [2021-01-20 11:39:23,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:39:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:39:23,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:39:23,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:39:30,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:39:30,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:39:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:39:30,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:39:30,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:39:30,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908047081] [2021-01-20 11:39:30,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:39:30,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:39:30,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:39:30,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=409, Unknown=3, NotChecked=0, Total=506 [2021-01-20 11:39:30,593 INFO L87 Difference]: Start difference. First operand 74230 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:39:31,382 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2021-01-20 11:39:33,992 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 35 [2021-01-20 11:39:37,664 WARN L193 SmtUtils]: Spent 3.47 s on a formula simplification. DAG size of input: 44 DAG size of output: 13 [2021-01-20 11:39:47,504 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 39 DAG size of output: 13 [2021-01-20 11:39:57,454 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification that was a NOOP. DAG size: 33 [2021-01-20 11:40:01,628 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 34 [2021-01-20 11:40:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:02,316 INFO L93 Difference]: Finished difference Result 74542 states and 164064 transitions. [2021-01-20 11:40:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:40:02,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:02,431 INFO L225 Difference]: With dead ends: 74542 [2021-01-20 11:40:02,432 INFO L226 Difference]: Without dead ends: 74390 [2021-01-20 11:40:02,432 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=465, Invalid=1511, Unknown=4, NotChecked=0, Total=1980 [2021-01-20 11:40:02,432 INFO L78 Accepts]: Start accepts. Automaton has 74390 states. Word has length 63 [2021-01-20 11:40:02,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:02,432 INFO L481 AbstractCegarLoop]: Abstraction has 74390 states. [2021-01-20 11:40:02,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 74390 states. [2021-01-20 11:40:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:02,497 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:02,497 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:02,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:02,698 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:02,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:02,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1592421991, now seen corresponding path program 98 times [2021-01-20 11:40:02,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:02,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254089814] [2021-01-20 11:40:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:03,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254089814] [2021-01-20 11:40:03,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123410140] [2021-01-20 11:40:03,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:03,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:40:03,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:03,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:03,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:04,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:04,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:04,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:40:04,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445613040] [2021-01-20 11:40:04,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:40:04,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:04,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:40:04,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:40:04,264 INFO L87 Difference]: Start difference. First operand 74390 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:06,367 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-01-20 11:40:14,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:14,424 INFO L93 Difference]: Finished difference Result 74950 states and 164944 transitions. [2021-01-20 11:40:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 11:40:14,427 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:14,560 INFO L225 Difference]: With dead ends: 74950 [2021-01-20 11:40:14,561 INFO L226 Difference]: Without dead ends: 74710 [2021-01-20 11:40:14,561 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=423, Invalid=1469, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 11:40:14,561 INFO L78 Accepts]: Start accepts. Automaton has 74710 states. Word has length 63 [2021-01-20 11:40:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:14,561 INFO L481 AbstractCegarLoop]: Abstraction has 74710 states. [2021-01-20 11:40:14,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 74710 states. [2021-01-20 11:40:14,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:14,639 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:14,639 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:40:14,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:14,853 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:14,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:14,854 INFO L82 PathProgramCache]: Analyzing trace with hash 899021825, now seen corresponding path program 99 times [2021-01-20 11:40:14,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:14,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071165724] [2021-01-20 11:40:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:15,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071165724] [2021-01-20 11:40:15,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476731491] [2021-01-20 11:40:15,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:15,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 11:40:15,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:15,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 11:40:15,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:16,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:16,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:16,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-01-20 11:40:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733690026] [2021-01-20 11:40:16,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 11:40:16,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:16,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 11:40:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-01-20 11:40:16,190 INFO L87 Difference]: Start difference. First operand 74710 states. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 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) [2021-01-20 11:40:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:19,645 INFO L93 Difference]: Finished difference Result 75630 states and 166304 transitions. [2021-01-20 11:40:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 11:40:19,648 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 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 63 [2021-01-20 11:40:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:19,799 INFO L225 Difference]: With dead ends: 75630 [2021-01-20 11:40:19,799 INFO L226 Difference]: Without dead ends: 75390 [2021-01-20 11:40:19,800 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=378, Invalid=1692, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 11:40:19,800 INFO L78 Accepts]: Start accepts. Automaton has 75390 states. Word has length 63 [2021-01-20 11:40:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:19,800 INFO L481 AbstractCegarLoop]: Abstraction has 75390 states. [2021-01-20 11:40:19,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 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) [2021-01-20 11:40:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 75390 states. [2021-01-20 11:40:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:19,891 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:19,891 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:40:20,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:20,104 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:20,105 INFO L82 PathProgramCache]: Analyzing trace with hash 628099955, now seen corresponding path program 100 times [2021-01-20 11:40:20,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:20,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199874707] [2021-01-20 11:40:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:20,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199874707] [2021-01-20 11:40:20,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326067498] [2021-01-20 11:40:20,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:20,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 11:40:20,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:23,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:23,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:23,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:40:23,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172660080] [2021-01-20 11:40:23,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:40:23,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:23,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:40:23,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:40:23,126 INFO L87 Difference]: Start difference. First operand 75390 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:23,801 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2021-01-20 11:40:25,317 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 15 [2021-01-20 11:40:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:34,626 INFO L93 Difference]: Finished difference Result 75830 states and 166704 transitions. [2021-01-20 11:40:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 11:40:34,628 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:34,721 INFO L225 Difference]: With dead ends: 75830 [2021-01-20 11:40:34,721 INFO L226 Difference]: Without dead ends: 75590 [2021-01-20 11:40:34,721 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=504, Invalid=1946, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 11:40:34,721 INFO L78 Accepts]: Start accepts. Automaton has 75590 states. Word has length 63 [2021-01-20 11:40:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:34,722 INFO L481 AbstractCegarLoop]: Abstraction has 75590 states. [2021-01-20 11:40:34,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:34,722 INFO L276 IsEmpty]: Start isEmpty. Operand 75590 states. [2021-01-20 11:40:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:34,776 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:34,776 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:40:34,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:34,976 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:34,977 INFO L82 PathProgramCache]: Analyzing trace with hash -853730911, now seen corresponding path program 101 times [2021-01-20 11:40:34,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:34,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138986931] [2021-01-20 11:40:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:35,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138986931] [2021-01-20 11:40:35,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471229749] [2021-01-20 11:40:35,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:35,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 11:40:35,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:36,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:36,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:36,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:36,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:36,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:40:36,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978079003] [2021-01-20 11:40:36,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:40:36,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:40:36,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:40:36,216 INFO L87 Difference]: Start difference. First operand 75590 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:37,061 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2021-01-20 11:40:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:40,615 INFO L93 Difference]: Finished difference Result 75782 states and 166544 transitions. [2021-01-20 11:40:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 11:40:40,618 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:40,773 INFO L225 Difference]: With dead ends: 75782 [2021-01-20 11:40:40,787 INFO L226 Difference]: Without dead ends: 75630 [2021-01-20 11:40:40,788 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=624, Invalid=2238, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 11:40:40,788 INFO L78 Accepts]: Start accepts. Automaton has 75630 states. Word has length 63 [2021-01-20 11:40:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:40,789 INFO L481 AbstractCegarLoop]: Abstraction has 75630 states. [2021-01-20 11:40:40,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 75630 states. [2021-01-20 11:40:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:41,106 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:41,106 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:40:41,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-01-20 11:40:41,320 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:41,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:41,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1505154611, now seen corresponding path program 102 times [2021-01-20 11:40:41,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:41,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425579977] [2021-01-20 11:40:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:41,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425579977] [2021-01-20 11:40:41,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57520794] [2021-01-20 11:40:41,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:41,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 11:40:41,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:40:41,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:42,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:42,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:42,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:43,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:43,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:40:43,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517126267] [2021-01-20 11:40:43,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:40:43,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:40:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:40:43,033 INFO L87 Difference]: Start difference. First operand 75630 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:40:47,384 INFO L93 Difference]: Finished difference Result 75822 states and 166624 transitions. [2021-01-20 11:40:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:40:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:40:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:40:47,527 INFO L225 Difference]: With dead ends: 75822 [2021-01-20 11:40:47,528 INFO L226 Difference]: Without dead ends: 75670 [2021-01-20 11:40:47,528 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=682, Invalid=2288, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 11:40:47,528 INFO L78 Accepts]: Start accepts. Automaton has 75670 states. Word has length 63 [2021-01-20 11:40:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:40:47,529 INFO L481 AbstractCegarLoop]: Abstraction has 75670 states. [2021-01-20 11:40:47,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 75670 states. [2021-01-20 11:40:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:40:47,609 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:40:47,609 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 11:40:47,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-01-20 11:40:47,825 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:40:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:40:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash -749153839, now seen corresponding path program 103 times [2021-01-20 11:40:47,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:40:47,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674363951] [2021-01-20 11:40:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:40:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:48,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674363951] [2021-01-20 11:40:48,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307863129] [2021-01-20 11:40:48,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:40:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:40:48,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:40:48,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:40:51,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:55,704 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-01-20 11:40:55,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:40:55,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:40:55,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:40:55,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 11:40:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:40:55,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:40:55,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:40:55,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453238708] [2021-01-20 11:40:55,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:40:55,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:40:55,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:40:55,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=384, Unknown=1, NotChecked=0, Total=506 [2021-01-20 11:40:55,837 INFO L87 Difference]: Start difference. First operand 75670 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:40:56,486 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 18 [2021-01-20 11:40:56,847 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 17 [2021-01-20 11:40:57,921 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 20 [2021-01-20 11:41:02,159 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-01-20 11:41:12,445 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 22 [2021-01-20 11:41:20,847 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-01-20 11:41:25,871 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-01-20 11:41:28,632 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-01-20 11:41:35,738 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-20 11:41:47,973 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 19 [2021-01-20 11:41:53,917 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-01-20 11:42:15,159 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-01-20 11:43:31,533 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-01-20 11:44:02,527 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-01-20 11:44:12,337 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-01-20 11:44:18,795 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 38 [2021-01-20 11:44:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 11:44:23,333 INFO L93 Difference]: Finished difference Result 77862 states and 171278 transitions. [2021-01-20 11:44:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-20 11:44:23,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-20 11:44:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 11:44:23,453 INFO L225 Difference]: With dead ends: 77862 [2021-01-20 11:44:23,454 INFO L226 Difference]: Without dead ends: 77498 [2021-01-20 11:44:23,454 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 103.1s TimeCoverageRelationStatistics Valid=1009, Invalid=3664, Unknown=19, NotChecked=0, Total=4692 [2021-01-20 11:44:23,454 INFO L78 Accepts]: Start accepts. Automaton has 77498 states. Word has length 63 [2021-01-20 11:44:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 11:44:23,454 INFO L481 AbstractCegarLoop]: Abstraction has 77498 states. [2021-01-20 11:44:23,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:23,455 INFO L276 IsEmpty]: Start isEmpty. Operand 77498 states. [2021-01-20 11:44:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-20 11:44:23,663 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 11:44:23,663 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 11:44:23,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-01-20 11:44:23,877 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 11:44:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 11:44:23,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1259088443, now seen corresponding path program 104 times [2021-01-20 11:44:23,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 11:44:23,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65879802] [2021-01-20 11:44:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 11:44:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 11:44:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:24,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65879802] [2021-01-20 11:44:24,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930861496] [2021-01-20 11:44:24,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:24,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 11:44:24,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 11:44:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 11:44:24,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 11:44:25,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 11:44:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 11:44:25,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 11:44:25,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-20 11:44:25,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276738885] [2021-01-20 11:44:25,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-20 11:44:25,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 11:44:25,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-20 11:44:25,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-20 11:44:25,936 INFO L87 Difference]: Start difference. First operand 77498 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 11:44:29,722 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 15 [2021-01-20 11:44:31,347 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 13 [2021-01-20 11:44:31,895 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-01-20 11:44:32,297 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 43 Received shutdown request... [2021-01-20 11:44:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 11:44:34,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 11:44:34,519 WARN L546 AbstractCegarLoop]: Verification canceled [2021-01-20 11:44:34,525 WARN L250 ceAbstractionStarter]: Timeout [2021-01-20 11:44:34,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 11:44:34 BasicIcfg [2021-01-20 11:44:34,526 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-20 11:44:34,527 INFO L168 Benchmark]: Toolchain (without parser) took 728102.72 ms. Allocated memory was 302.0 MB in the beginning and 5.9 GB in the end (delta: 5.6 GB). Free memory was 277.6 MB in the beginning and 2.1 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-01-20 11:44:34,528 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 302.0 MB. Free memory was 272.1 MB in the beginning and 272.1 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-20 11:44:34,533 INFO L168 Benchmark]: CACSL2BoogieTranslator took 800.09 ms. Allocated memory is still 302.0 MB. Free memory was 277.2 MB in the beginning and 248.0 MB in the end (delta: 29.2 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2021-01-20 11:44:34,533 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.07 ms. Allocated memory is still 302.0 MB. Free memory was 248.0 MB in the beginning and 246.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 11:44:34,534 INFO L168 Benchmark]: Boogie Preprocessor took 65.86 ms. Allocated memory is still 302.0 MB. Free memory was 246.1 MB in the beginning and 244.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 11:44:34,534 INFO L168 Benchmark]: RCFGBuilder took 605.38 ms. Allocated memory is still 302.0 MB. Free memory was 244.7 MB in the beginning and 266.2 MB in the end (delta: -21.5 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.0 GB. [2021-01-20 11:44:34,534 INFO L168 Benchmark]: TraceAbstraction took 726536.15 ms. Allocated memory was 302.0 MB in the beginning and 5.9 GB in the end (delta: 5.6 GB). Free memory was 265.2 MB in the beginning and 2.1 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-01-20 11:44:34,543 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 302.0 MB. Free memory was 272.1 MB in the beginning and 272.1 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 800.09 ms. Allocated memory is still 302.0 MB. Free memory was 277.2 MB in the beginning and 248.0 MB in the end (delta: 29.2 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 79.07 ms. Allocated memory is still 302.0 MB. Free memory was 248.0 MB in the beginning and 246.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 65.86 ms. Allocated memory is still 302.0 MB. Free memory was 246.1 MB in the beginning and 244.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 605.38 ms. Allocated memory is still 302.0 MB. Free memory was 244.7 MB in the beginning and 266.2 MB in the end (delta: -21.5 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 726536.15 ms. Allocated memory was 302.0 MB in the beginning and 5.9 GB in the end (delta: 5.6 GB). Free memory was 265.2 MB in the beginning and 2.1 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 20). Cancelled while BasicCegarLoop was constructing difference of abstraction (77498states) and FLOYD_HOARE automaton (currently 43 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (6376 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 726.3s, OverallIterations: 127, TraceHistogramMax: 6, AutomataDifference: 597.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 11453 SDtfs, 108225 SDslu, 138121 SDs, 0 SdLazy, 23349 SolverSat, 8205 SolverUnsat, 124 SolverUnknown, 0 SolverNotchecked, 269.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10953 GetRequests, 5826 SyntacticMatches, 57 SemanticMatches, 5070 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68629 ImplicationChecksByTransitivity, 353.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77498occurred in iteration=126, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 85.4s InterpolantComputationTime, 13601 NumberOfCodeBlocks, 13601 NumberOfCodeBlocksAsserted, 418 NumberOfCheckSat, 13354 ConstructedInterpolants, 9 QuantifiedInterpolants, 5869699 SizeOfPredicates, 493 NumberOfNonLiveVariables, 16343 ConjunctsInSsa, 1551 ConjunctsInUnsatCore, 247 InterpolantComputations, 7 PerfectInterpolantSequences, 0/4608 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 [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process !SESSION 2021-01-20 11:32:22.687 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.9 java.vendor=AdoptOpenJDK BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_GB Framework arguments: -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i Command-line arguments: -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i !ENTRY org.eclipse.osgi 4 0 2021-01-20 11:44:34.849 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c7152fb/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c7152fb/.metadata/.log.