/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 14:36:11,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 14:36:11,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 14:36:11,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 14:36:11,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 14:36:11,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 14:36:11,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 14:36:11,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 14:36:11,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 14:36:11,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 14:36:11,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 14:36:11,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 14:36:11,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 14:36:11,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 14:36:11,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 14:36:11,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 14:36:11,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 14:36:11,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 14:36:11,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 14:36:11,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 14:36:11,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 14:36:11,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 14:36:11,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 14:36:11,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 14:36:11,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 14:36:11,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 14:36:11,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 14:36:11,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 14:36:11,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 14:36:11,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 14:36:11,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 14:36:11,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 14:36:11,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 14:36:11,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 14:36:11,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 14:36:11,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 14:36:11,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 14:36:11,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 14:36:11,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 14:36:11,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 14:36:11,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 14:36:11,401 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 [2021-03-10 14:36:11,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 14:36:11,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 14:36:11,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 14:36:11,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 14:36:11,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 14:36:11,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 14:36:11,431 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 14:36:11,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 14:36:11,431 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 14:36:11,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 14:36:11,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 14:36:11,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 14:36:11,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 14:36:11,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 14:36:11,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 14:36:11,433 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 14:36:11,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 14:36:11,433 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 14:36:11,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 14:36:11,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 14:36:11,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 14:36:11,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 14:36:11,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 14:36:11,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 14:36:11,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 14:36:11,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 14:36:11,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 14:36:11,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 14:36:11,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 14:36:11,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 14:36:11,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 14:36:11,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 14:36:11,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 14:36:11,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 14:36:11,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 14:36:11,721 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-10 14:36:11,721 INFO L275 PluginConnector]: CDTParser initialized [2021-03-10 14:36:11,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-03-10 14:36:11,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7f48917/f4b82fd399a946b2a3f9c2127dc31bff/FLAG5d6db5a8b [2021-03-10 14:36:12,135 INFO L306 CDTParser]: Found 1 translation units. [2021-03-10 14:36:12,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-03-10 14:36:12,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7f48917/f4b82fd399a946b2a3f9c2127dc31bff/FLAG5d6db5a8b [2021-03-10 14:36:12,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7f48917/f4b82fd399a946b2a3f9c2127dc31bff [2021-03-10 14:36:12,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 14:36:12,491 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-10 14:36:12,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-10 14:36:12,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-10 14:36:12,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-10 14:36:12,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b67e762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12, skipping insertion in model container [2021-03-10 14:36:12,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-10 14:36:12,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-10 14:36:12,767 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i[30286,30299] [2021-03-10 14:36:12,784 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i[31040,31053] [2021-03-10 14:36:12,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 14:36:12,794 INFO L203 MainTranslator]: Completed pre-run [2021-03-10 14:36:12,834 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i[30286,30299] [2021-03-10 14:36:12,838 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i[31040,31053] [2021-03-10 14:36:12,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 14:36:12,898 INFO L208 MainTranslator]: Completed translation [2021-03-10 14:36:12,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12 WrapperNode [2021-03-10 14:36:12,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-10 14:36:12,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 14:36:12,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 14:36:12,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 14:36:12,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 14:36:12,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 14:36:12,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 14:36:12,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 14:36:12,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (1/1) ... [2021-03-10 14:36:12,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 14:36:12,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 14:36:12,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 14:36:12,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 14:36:12,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (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 [2021-03-10 14:36:13,048 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-03-10 14:36:13,049 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-03-10 14:36:13,049 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-03-10 14:36:13,050 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-03-10 14:36:13,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-10 14:36:13,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-10 14:36:13,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-10 14:36:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-10 14:36:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-10 14:36:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-10 14:36:13,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 14:36:13,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 14:36:13,052 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 14:36:13,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 14:36:13,331 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-03-10 14:36:13,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 02:36:13 BoogieIcfgContainer [2021-03-10 14:36:13,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 14:36:13,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 14:36:13,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 14:36:13,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 14:36:13,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.03 02:36:12" (1/3) ... [2021-03-10 14:36:13,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c062d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 02:36:13, skipping insertion in model container [2021-03-10 14:36:13,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 02:36:12" (2/3) ... [2021-03-10 14:36:13,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c062d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 02:36:13, skipping insertion in model container [2021-03-10 14:36:13,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 02:36:13" (3/3) ... [2021-03-10 14:36:13,338 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2021-03-10 14:36:13,341 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 14:36:13,341 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 14:36:13,344 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 14:36:13,345 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 14:36:13,360 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,360 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,360 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,360 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,360 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,360 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,362 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,362 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,362 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,362 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,362 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,362 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,362 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,362 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,363 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,363 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,363 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,363 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,363 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,363 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,364 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,364 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,364 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,364 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,364 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,365 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,365 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,365 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,365 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,365 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,365 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,365 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,365 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,365 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,365 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,366 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,366 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,366 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,366 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,366 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,366 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,366 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,366 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,366 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,367 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,367 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,368 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 14:36:13,373 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 14:36:13,384 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 14:36:13,396 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 14:36:13,396 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 14:36:13,396 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 14:36:13,397 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 14:36:13,397 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 14:36:13,397 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 14:36:13,397 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 14:36:13,397 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 14:36:13,403 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 62 transitions, 134 flow [2021-03-10 14:36:13,482 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1866 states, 1864 states have (on average 3.1448497854077253) internal successors, (5862), 1865 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 1866 states, 1864 states have (on average 3.1448497854077253) internal successors, (5862), 1865 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 14:36:13,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:13,493 INFO L519 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] [2021-03-10 14:36:13,494 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:13,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1965619843, now seen corresponding path program 1 times [2021-03-10 14:36:13,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:13,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611129651] [2021-03-10 14:36:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:13,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611129651] [2021-03-10 14:36:13,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:13,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 14:36:13,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061031744] [2021-03-10 14:36:13,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 14:36:13,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 14:36:13,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 14:36:13,793 INFO L87 Difference]: Start difference. First operand has 1866 states, 1864 states have (on average 3.1448497854077253) internal successors, (5862), 1865 states have internal predecessors, (5862), 0 states have call successors, (0), 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 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:14,044 INFO L93 Difference]: Finished difference Result 3730 states and 10826 transitions. [2021-03-10 14:36:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 14:36:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 14:36:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:14,069 INFO L225 Difference]: With dead ends: 3730 [2021-03-10 14:36:14,069 INFO L226 Difference]: Without dead ends: 1168 [2021-03-10 14:36:14,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 14:36:14,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-03-10 14:36:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 903. [2021-03-10 14:36:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.7084257206208426) internal successors, (2443), 902 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2443 transitions. [2021-03-10 14:36:14,160 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2443 transitions. Word has length 26 [2021-03-10 14:36:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:14,161 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 2443 transitions. [2021-03-10 14:36:14,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2443 transitions. [2021-03-10 14:36:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:14,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:14,167 INFO L519 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] [2021-03-10 14:36:14,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 14:36:14,167 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash -303130507, now seen corresponding path program 1 times [2021-03-10 14:36:14,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:14,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658659684] [2021-03-10 14:36:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:14,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658659684] [2021-03-10 14:36:14,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:14,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:14,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129704774] [2021-03-10 14:36:14,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:14,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:14,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:14,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:14,293 INFO L87 Difference]: Start difference. First operand 903 states and 2443 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:14,400 INFO L93 Difference]: Finished difference Result 1680 states and 4453 transitions. [2021-03-10 14:36:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:14,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 14:36:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:14,408 INFO L225 Difference]: With dead ends: 1680 [2021-03-10 14:36:14,408 INFO L226 Difference]: Without dead ends: 1422 [2021-03-10 14:36:14,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-03-10 14:36:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 998. [2021-03-10 14:36:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.7191574724172516) internal successors, (2711), 997 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2711 transitions. [2021-03-10 14:36:14,432 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2711 transitions. Word has length 31 [2021-03-10 14:36:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:14,432 INFO L480 AbstractCegarLoop]: Abstraction has 998 states and 2711 transitions. [2021-03-10 14:36:14,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2711 transitions. [2021-03-10 14:36:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:14,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:14,435 INFO L519 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] [2021-03-10 14:36:14,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 14:36:14,435 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:14,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2076066167, now seen corresponding path program 1 times [2021-03-10 14:36:14,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:14,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367513367] [2021-03-10 14:36:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:14,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367513367] [2021-03-10 14:36:14,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:14,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:14,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461642246] [2021-03-10 14:36:14,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:14,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:14,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:14,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:14,524 INFO L87 Difference]: Start difference. First operand 998 states and 2711 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:14,595 INFO L93 Difference]: Finished difference Result 1726 states and 4512 transitions. [2021-03-10 14:36:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:14,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 14:36:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:14,601 INFO L225 Difference]: With dead ends: 1726 [2021-03-10 14:36:14,601 INFO L226 Difference]: Without dead ends: 1422 [2021-03-10 14:36:14,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-03-10 14:36:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1101. [2021-03-10 14:36:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 2.6672727272727275) internal successors, (2934), 1100 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2934 transitions. [2021-03-10 14:36:14,623 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2934 transitions. Word has length 31 [2021-03-10 14:36:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:14,623 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 2934 transitions. [2021-03-10 14:36:14,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2934 transitions. [2021-03-10 14:36:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 14:36:14,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:14,625 INFO L519 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] [2021-03-10 14:36:14,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 14:36:14,625 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1770231059, now seen corresponding path program 2 times [2021-03-10 14:36:14,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:14,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618923635] [2021-03-10 14:36:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:14,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618923635] [2021-03-10 14:36:14,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:14,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 14:36:14,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4359508] [2021-03-10 14:36:14,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 14:36:14,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:14,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 14:36:14,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 14:36:14,737 INFO L87 Difference]: Start difference. First operand 1101 states and 2934 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:14,822 INFO L93 Difference]: Finished difference Result 1918 states and 5024 transitions. [2021-03-10 14:36:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 14:36:14,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 14:36:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:14,829 INFO L225 Difference]: With dead ends: 1918 [2021-03-10 14:36:14,831 INFO L226 Difference]: Without dead ends: 1596 [2021-03-10 14:36:14,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-03-10 14:36:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1179. [2021-03-10 14:36:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 2.6816638370118846) internal successors, (3159), 1178 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 3159 transitions. [2021-03-10 14:36:14,860 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 3159 transitions. Word has length 31 [2021-03-10 14:36:14,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:14,861 INFO L480 AbstractCegarLoop]: Abstraction has 1179 states and 3159 transitions. [2021-03-10 14:36:14,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:14,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 3159 transitions. [2021-03-10 14:36:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:14,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:14,864 INFO L519 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] [2021-03-10 14:36:14,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 14:36:14,864 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1032684214, now seen corresponding path program 1 times [2021-03-10 14:36:14,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:14,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345824640] [2021-03-10 14:36:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:14,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345824640] [2021-03-10 14:36:14,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993670463] [2021-03-10 14:36:14,955 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 [2021-03-10 14:36:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:15,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 14:36:15,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:15,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:15,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 14:36:15,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581965042] [2021-03-10 14:36:15,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 14:36:15,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:15,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 14:36:15,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:15,273 INFO L87 Difference]: Start difference. First operand 1179 states and 3159 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:15,473 INFO L93 Difference]: Finished difference Result 2364 states and 6203 transitions. [2021-03-10 14:36:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 14:36:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 14:36:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:15,482 INFO L225 Difference]: With dead ends: 2364 [2021-03-10 14:36:15,482 INFO L226 Difference]: Without dead ends: 2000 [2021-03-10 14:36:15,482 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-03-10 14:36:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-03-10 14:36:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1369. [2021-03-10 14:36:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 2.7010233918128654) internal successors, (3695), 1368 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 3695 transitions. [2021-03-10 14:36:15,521 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 3695 transitions. Word has length 36 [2021-03-10 14:36:15,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:15,522 INFO L480 AbstractCegarLoop]: Abstraction has 1369 states and 3695 transitions. [2021-03-10 14:36:15,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 3695 transitions. [2021-03-10 14:36:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:15,523 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:15,523 INFO L519 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] [2021-03-10 14:36:15,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:15,741 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:15,742 INFO L82 PathProgramCache]: Analyzing trace with hash 969132415, now seen corresponding path program 1 times [2021-03-10 14:36:15,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:15,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416417588] [2021-03-10 14:36:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:15,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416417588] [2021-03-10 14:36:15,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:15,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:15,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951326922] [2021-03-10 14:36:15,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:15,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:15,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:15,841 INFO L87 Difference]: Start difference. First operand 1369 states and 3695 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:15,911 INFO L93 Difference]: Finished difference Result 2041 states and 5346 transitions. [2021-03-10 14:36:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 14:36:15,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 14:36:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:15,917 INFO L225 Difference]: With dead ends: 2041 [2021-03-10 14:36:15,918 INFO L226 Difference]: Without dead ends: 1889 [2021-03-10 14:36:15,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 14:36:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2021-03-10 14:36:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1433. [2021-03-10 14:36:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 2.685055865921788) internal successors, (3845), 1432 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 3845 transitions. [2021-03-10 14:36:15,963 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 3845 transitions. Word has length 36 [2021-03-10 14:36:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:15,964 INFO L480 AbstractCegarLoop]: Abstraction has 1433 states and 3845 transitions. [2021-03-10 14:36:15,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 3845 transitions. [2021-03-10 14:36:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:15,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:15,965 INFO L519 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] [2021-03-10 14:36:15,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 14:36:15,966 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1417802485, now seen corresponding path program 2 times [2021-03-10 14:36:15,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:15,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309783111] [2021-03-10 14:36:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:16,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309783111] [2021-03-10 14:36:16,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:16,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:16,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159138227] [2021-03-10 14:36:16,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:16,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:16,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:16,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:16,076 INFO L87 Difference]: Start difference. First operand 1433 states and 3845 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:16,198 INFO L93 Difference]: Finished difference Result 2336 states and 6145 transitions. [2021-03-10 14:36:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 14:36:16,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 14:36:16,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:16,206 INFO L225 Difference]: With dead ends: 2336 [2021-03-10 14:36:16,207 INFO L226 Difference]: Without dead ends: 2078 [2021-03-10 14:36:16,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 14:36:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-03-10 14:36:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1412. [2021-03-10 14:36:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.6959603118355777) internal successors, (3804), 1411 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 3804 transitions. [2021-03-10 14:36:16,237 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 3804 transitions. Word has length 36 [2021-03-10 14:36:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:16,237 INFO L480 AbstractCegarLoop]: Abstraction has 1412 states and 3804 transitions. [2021-03-10 14:36:16,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 3804 transitions. [2021-03-10 14:36:16,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:16,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:16,240 INFO L519 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] [2021-03-10 14:36:16,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 14:36:16,241 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:16,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1379254383, now seen corresponding path program 3 times [2021-03-10 14:36:16,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:16,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463355188] [2021-03-10 14:36:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:16,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463355188] [2021-03-10 14:36:16,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 14:36:16,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 14:36:16,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815411032] [2021-03-10 14:36:16,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 14:36:16,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:16,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 14:36:16,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 14:36:16,318 INFO L87 Difference]: Start difference. First operand 1412 states and 3804 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:16,397 INFO L93 Difference]: Finished difference Result 2345 states and 6194 transitions. [2021-03-10 14:36:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 14:36:16,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 14:36:16,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:16,403 INFO L225 Difference]: With dead ends: 2345 [2021-03-10 14:36:16,404 INFO L226 Difference]: Without dead ends: 2087 [2021-03-10 14:36:16,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-03-10 14:36:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1424. [2021-03-10 14:36:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.702740688685875) internal successors, (3846), 1423 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3846 transitions. [2021-03-10 14:36:16,428 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3846 transitions. Word has length 36 [2021-03-10 14:36:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:16,428 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 3846 transitions. [2021-03-10 14:36:16,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3846 transitions. [2021-03-10 14:36:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:16,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:16,430 INFO L519 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] [2021-03-10 14:36:16,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 14:36:16,430 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:16,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1844145908, now seen corresponding path program 1 times [2021-03-10 14:36:16,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:16,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508194246] [2021-03-10 14:36:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:16,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508194246] [2021-03-10 14:36:16,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819485202] [2021-03-10 14:36:16,494 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 [2021-03-10 14:36:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:16,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 14:36:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:16,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:16,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 14:36:16,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983683083] [2021-03-10 14:36:16,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 14:36:16,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:16,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 14:36:16,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:16,673 INFO L87 Difference]: Start difference. First operand 1424 states and 3846 transitions. 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) [2021-03-10 14:36:16,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:16,748 INFO L93 Difference]: Finished difference Result 2321 states and 6018 transitions. [2021-03-10 14:36:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 14:36:16,749 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 36 [2021-03-10 14:36:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:16,755 INFO L225 Difference]: With dead ends: 2321 [2021-03-10 14:36:16,755 INFO L226 Difference]: Without dead ends: 2017 [2021-03-10 14:36:16,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:16,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-03-10 14:36:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1508. [2021-03-10 14:36:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 2.6715328467153285) internal successors, (4026), 1507 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 4026 transitions. [2021-03-10 14:36:16,792 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 4026 transitions. Word has length 36 [2021-03-10 14:36:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:16,793 INFO L480 AbstractCegarLoop]: Abstraction has 1508 states and 4026 transitions. [2021-03-10 14:36:16,794 INFO L481 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) [2021-03-10 14:36:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 4026 transitions. [2021-03-10 14:36:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:16,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:16,795 INFO L519 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] [2021-03-10 14:36:17,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 14:36:17,011 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash 435863358, now seen corresponding path program 2 times [2021-03-10 14:36:17,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:17,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742377786] [2021-03-10 14:36:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:17,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742377786] [2021-03-10 14:36:17,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660053964] [2021-03-10 14:36:17,076 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 [2021-03-10 14:36:17,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 14:36:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:17,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:17,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 14:36:17,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937289901] [2021-03-10 14:36:17,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 14:36:17,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:17,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 14:36:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 14:36:17,241 INFO L87 Difference]: Start difference. First operand 1508 states and 4026 transitions. 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) [2021-03-10 14:36:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:17,321 INFO L93 Difference]: Finished difference Result 2361 states and 6098 transitions. [2021-03-10 14:36:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 14:36:17,321 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 36 [2021-03-10 14:36:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:17,337 INFO L225 Difference]: With dead ends: 2361 [2021-03-10 14:36:17,337 INFO L226 Difference]: Without dead ends: 2057 [2021-03-10 14:36:17,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:17,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-03-10 14:36:17,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1546. [2021-03-10 14:36:17,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.67831715210356) internal successors, (4138), 1545 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 4138 transitions. [2021-03-10 14:36:17,366 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 4138 transitions. Word has length 36 [2021-03-10 14:36:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:17,366 INFO L480 AbstractCegarLoop]: Abstraction has 1546 states and 4138 transitions. [2021-03-10 14:36:17,366 INFO L481 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) [2021-03-10 14:36:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 4138 transitions. [2021-03-10 14:36:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 14:36:17,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:17,368 INFO L519 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] [2021-03-10 14:36:17,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 14:36:17,581 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:17,581 INFO L82 PathProgramCache]: Analyzing trace with hash 31489540, now seen corresponding path program 3 times [2021-03-10 14:36:17,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:17,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960037217] [2021-03-10 14:36:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:17,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960037217] [2021-03-10 14:36:17,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770630974] [2021-03-10 14:36:17,638 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 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 [2021-03-10 14:36:17,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 14:36:17,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:17,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 14:36:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:17,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:17,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 14:36:17,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229740619] [2021-03-10 14:36:17,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 14:36:17,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:17,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 14:36:17,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:17,803 INFO L87 Difference]: Start difference. First operand 1546 states and 4138 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:17,975 INFO L93 Difference]: Finished difference Result 2833 states and 7426 transitions. [2021-03-10 14:36:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 14:36:17,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 14:36:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:17,979 INFO L225 Difference]: With dead ends: 2833 [2021-03-10 14:36:17,979 INFO L226 Difference]: Without dead ends: 2317 [2021-03-10 14:36:17,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-10 14:36:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-03-10 14:36:18,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1702. [2021-03-10 14:36:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.6872427983539096) internal successors, (4571), 1701 states have internal predecessors, (4571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4571 transitions. [2021-03-10 14:36:18,009 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4571 transitions. Word has length 36 [2021-03-10 14:36:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:18,009 INFO L480 AbstractCegarLoop]: Abstraction has 1702 states and 4571 transitions. [2021-03-10 14:36:18,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4571 transitions. [2021-03-10 14:36:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:18,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:18,012 INFO L519 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] [2021-03-10 14:36:18,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:18,229 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:18,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1177411618, now seen corresponding path program 1 times [2021-03-10 14:36:18,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:18,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107718226] [2021-03-10 14:36:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:18,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107718226] [2021-03-10 14:36:18,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132543915] [2021-03-10 14:36:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 14:36:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:18,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:18,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:18,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:18,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:18,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492755994] [2021-03-10 14:36:18,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:18,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:18,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:18,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:18,517 INFO L87 Difference]: Start difference. First operand 1702 states and 4571 transitions. 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) [2021-03-10 14:36:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:18,642 INFO L93 Difference]: Finished difference Result 2438 states and 6390 transitions. [2021-03-10 14:36:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 14:36:18,643 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 41 [2021-03-10 14:36:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:18,646 INFO L225 Difference]: With dead ends: 2438 [2021-03-10 14:36:18,646 INFO L226 Difference]: Without dead ends: 2286 [2021-03-10 14:36:18,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-03-10 14:36:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1766. [2021-03-10 14:36:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.674787535410765) internal successors, (4721), 1765 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4721 transitions. [2021-03-10 14:36:18,677 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4721 transitions. Word has length 41 [2021-03-10 14:36:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:18,677 INFO L480 AbstractCegarLoop]: Abstraction has 1766 states and 4721 transitions. [2021-03-10 14:36:18,678 INFO L481 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) [2021-03-10 14:36:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4721 transitions. [2021-03-10 14:36:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:18,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:18,680 INFO L519 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] [2021-03-10 14:36:18,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 14:36:18,897 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:18,897 INFO L82 PathProgramCache]: Analyzing trace with hash -728741548, now seen corresponding path program 2 times [2021-03-10 14:36:18,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:18,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580426722] [2021-03-10 14:36:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:18,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580426722] [2021-03-10 14:36:18,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735029033] [2021-03-10 14:36:18,971 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 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 [2021-03-10 14:36:19,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:19,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:19,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:19,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 14:36:19,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323758861] [2021-03-10 14:36:19,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 14:36:19,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:19,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 14:36:19,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:19,111 INFO L87 Difference]: Start difference. First operand 1766 states and 4721 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:19,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:19,417 INFO L93 Difference]: Finished difference Result 3594 states and 9314 transitions. [2021-03-10 14:36:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 14:36:19,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 14:36:19,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:19,423 INFO L225 Difference]: With dead ends: 3594 [2021-03-10 14:36:19,423 INFO L226 Difference]: Without dead ends: 3054 [2021-03-10 14:36:19,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-03-10 14:36:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-03-10 14:36:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 1792. [2021-03-10 14:36:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 2.6945840312674485) internal successors, (4826), 1791 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 4826 transitions. [2021-03-10 14:36:19,458 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 4826 transitions. Word has length 41 [2021-03-10 14:36:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:19,458 INFO L480 AbstractCegarLoop]: Abstraction has 1792 states and 4826 transitions. [2021-03-10 14:36:19,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 4826 transitions. [2021-03-10 14:36:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:19,460 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:19,460 INFO L519 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] [2021-03-10 14:36:19,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:19,667 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:19,667 INFO L82 PathProgramCache]: Analyzing trace with hash 956871302, now seen corresponding path program 1 times [2021-03-10 14:36:19,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:19,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008262270] [2021-03-10 14:36:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:19,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008262270] [2021-03-10 14:36:19,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935063307] [2021-03-10 14:36:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:19,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:19,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:19,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:19,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:19,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77043651] [2021-03-10 14:36:19,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:19,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:19,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:19,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:19,886 INFO L87 Difference]: Start difference. First operand 1792 states and 4826 transitions. 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) [2021-03-10 14:36:19,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:19,978 INFO L93 Difference]: Finished difference Result 2744 states and 7080 transitions. [2021-03-10 14:36:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 14:36:19,978 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 41 [2021-03-10 14:36:19,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:19,982 INFO L225 Difference]: With dead ends: 2744 [2021-03-10 14:36:19,982 INFO L226 Difference]: Without dead ends: 2592 [2021-03-10 14:36:19,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-03-10 14:36:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 1817. [2021-03-10 14:36:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1817 states, 1816 states have (on average 2.6877753303964758) internal successors, (4881), 1816 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 4881 transitions. [2021-03-10 14:36:20,015 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 4881 transitions. Word has length 41 [2021-03-10 14:36:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:20,015 INFO L480 AbstractCegarLoop]: Abstraction has 1817 states and 4881 transitions. [2021-03-10 14:36:20,015 INFO L481 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) [2021-03-10 14:36:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 4881 transitions. [2021-03-10 14:36:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:20,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:20,017 INFO L519 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] [2021-03-10 14:36:20,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 14:36:20,236 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash 249785212, now seen corresponding path program 2 times [2021-03-10 14:36:20,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:20,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640547847] [2021-03-10 14:36:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:20,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640547847] [2021-03-10 14:36:20,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988844383] [2021-03-10 14:36:20,306 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 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 [2021-03-10 14:36:20,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:20,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:20,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:20,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:20,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010594106] [2021-03-10 14:36:20,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:20,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:20,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:20,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:20,470 INFO L87 Difference]: Start difference. First operand 1817 states and 4881 transitions. 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) [2021-03-10 14:36:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:20,587 INFO L93 Difference]: Finished difference Result 2784 states and 7160 transitions. [2021-03-10 14:36:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 14:36:20,587 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 41 [2021-03-10 14:36:20,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:20,592 INFO L225 Difference]: With dead ends: 2784 [2021-03-10 14:36:20,592 INFO L226 Difference]: Without dead ends: 2632 [2021-03-10 14:36:20,593 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 14:36:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-03-10 14:36:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 1796. [2021-03-10 14:36:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 2.694150417827298) internal successors, (4836), 1795 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 4836 transitions. [2021-03-10 14:36:20,619 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 4836 transitions. Word has length 41 [2021-03-10 14:36:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:20,619 INFO L480 AbstractCegarLoop]: Abstraction has 1796 states and 4836 transitions. [2021-03-10 14:36:20,619 INFO L481 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) [2021-03-10 14:36:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 4836 transitions. [2021-03-10 14:36:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:20,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:20,621 INFO L519 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] [2021-03-10 14:36:20,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 14:36:20,831 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:20,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1083067482, now seen corresponding path program 3 times [2021-03-10 14:36:20,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:20,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197894974] [2021-03-10 14:36:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:20,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197894974] [2021-03-10 14:36:20,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464597037] [2021-03-10 14:36:20,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 14:36:20,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 14:36:20,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:20,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:21,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:21,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 14:36:21,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374531215] [2021-03-10 14:36:21,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:21,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:21,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:21,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:21,059 INFO L87 Difference]: Start difference. First operand 1796 states and 4836 transitions. 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) [2021-03-10 14:36:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:21,194 INFO L93 Difference]: Finished difference Result 2858 states and 7420 transitions. [2021-03-10 14:36:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 14:36:21,194 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 41 [2021-03-10 14:36:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:21,198 INFO L225 Difference]: With dead ends: 2858 [2021-03-10 14:36:21,198 INFO L226 Difference]: Without dead ends: 2706 [2021-03-10 14:36:21,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-03-10 14:36:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-03-10 14:36:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1876. [2021-03-10 14:36:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.7125333333333335) internal successors, (5086), 1875 states have internal predecessors, (5086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5086 transitions. [2021-03-10 14:36:21,236 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5086 transitions. Word has length 41 [2021-03-10 14:36:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:21,236 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 5086 transitions. [2021-03-10 14:36:21,236 INFO L481 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) [2021-03-10 14:36:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5086 transitions. [2021-03-10 14:36:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 14:36:21,238 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:21,238 INFO L519 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] [2021-03-10 14:36:21,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:21,448 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:21,449 INFO L82 PathProgramCache]: Analyzing trace with hash 671673730, now seen corresponding path program 4 times [2021-03-10 14:36:21,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:21,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754607818] [2021-03-10 14:36:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:21,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754607818] [2021-03-10 14:36:21,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298580492] [2021-03-10 14:36:21,514 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 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 [2021-03-10 14:36:21,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:21,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 14:36:21,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:21,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:21,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 14:36:21,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389587640] [2021-03-10 14:36:21,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 14:36:21,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 14:36:21,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 14:36:21,681 INFO L87 Difference]: Start difference. First operand 1876 states and 5086 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:22,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:22,100 INFO L93 Difference]: Finished difference Result 4428 states and 11523 transitions. [2021-03-10 14:36:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 14:36:22,100 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 14:36:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:22,115 INFO L225 Difference]: With dead ends: 4428 [2021-03-10 14:36:22,115 INFO L226 Difference]: Without dead ends: 3630 [2021-03-10 14:36:22,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 14:36:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-03-10 14:36:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 2069. [2021-03-10 14:36:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.6832688588007736) internal successors, (5549), 2068 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5549 transitions. [2021-03-10 14:36:22,151 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5549 transitions. Word has length 41 [2021-03-10 14:36:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:22,151 INFO L480 AbstractCegarLoop]: Abstraction has 2069 states and 5549 transitions. [2021-03-10 14:36:22,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5549 transitions. [2021-03-10 14:36:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:22,153 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:22,153 INFO L519 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] [2021-03-10 14:36:22,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:22,371 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:22,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2033165846, now seen corresponding path program 2 times [2021-03-10 14:36:22,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:22,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580169963] [2021-03-10 14:36:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:22,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580169963] [2021-03-10 14:36:22,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438127822] [2021-03-10 14:36:22,455 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 [2021-03-10 14:36:22,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:22,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:22,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:22,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:22,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:22,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 14:36:22,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249031289] [2021-03-10 14:36:22,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 14:36:22,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:22,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 14:36:22,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:22,648 INFO L87 Difference]: Start difference. First operand 2069 states and 5549 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:22,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:22,829 INFO L93 Difference]: Finished difference Result 3552 states and 9329 transitions. [2021-03-10 14:36:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 14:36:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 14:36:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:22,834 INFO L225 Difference]: With dead ends: 3552 [2021-03-10 14:36:22,834 INFO L226 Difference]: Without dead ends: 3188 [2021-03-10 14:36:22,834 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-03-10 14:36:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3188 states. [2021-03-10 14:36:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3188 to 2279. [2021-03-10 14:36:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 2.7036874451273047) internal successors, (6159), 2278 states have internal predecessors, (6159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 6159 transitions. [2021-03-10 14:36:22,863 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 6159 transitions. Word has length 46 [2021-03-10 14:36:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:22,863 INFO L480 AbstractCegarLoop]: Abstraction has 2279 states and 6159 transitions. [2021-03-10 14:36:22,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 6159 transitions. [2021-03-10 14:36:22,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:22,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:22,866 INFO L519 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] [2021-03-10 14:36:23,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 14:36:23,084 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:23,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1969614047, now seen corresponding path program 3 times [2021-03-10 14:36:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:23,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071368381] [2021-03-10 14:36:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:23,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071368381] [2021-03-10 14:36:23,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193283014] [2021-03-10 14:36:23,173 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 [2021-03-10 14:36:23,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 14:36:23,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:23,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 14:36:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:23,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:23,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 14:36:23,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813727510] [2021-03-10 14:36:23,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 14:36:23,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:23,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 14:36:23,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 14:36:23,327 INFO L87 Difference]: Start difference. First operand 2279 states and 6159 transitions. 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) [2021-03-10 14:36:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:23,441 INFO L93 Difference]: Finished difference Result 3297 states and 8556 transitions. [2021-03-10 14:36:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 14:36:23,442 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 46 [2021-03-10 14:36:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:23,448 INFO L225 Difference]: With dead ends: 3297 [2021-03-10 14:36:23,448 INFO L226 Difference]: Without dead ends: 3145 [2021-03-10 14:36:23,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-03-10 14:36:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2021-03-10 14:36:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2352. [2021-03-10 14:36:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.689919183326244) internal successors, (6324), 2351 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6324 transitions. [2021-03-10 14:36:23,484 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6324 transitions. Word has length 46 [2021-03-10 14:36:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:23,484 INFO L480 AbstractCegarLoop]: Abstraction has 2352 states and 6324 transitions. [2021-03-10 14:36:23,484 INFO L481 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) [2021-03-10 14:36:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6324 transitions. [2021-03-10 14:36:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:23,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:23,487 INFO L519 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] [2021-03-10 14:36:23,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:23,699 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:23,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1876683179, now seen corresponding path program 4 times [2021-03-10 14:36:23,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:23,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274582343] [2021-03-10 14:36:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:23,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274582343] [2021-03-10 14:36:23,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000096862] [2021-03-10 14:36:23,775 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 [2021-03-10 14:36:23,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:23,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:23,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:23,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:24,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:24,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 14:36:24,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967807676] [2021-03-10 14:36:24,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 14:36:24,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:24,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 14:36:24,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 14:36:24,028 INFO L87 Difference]: Start difference. First operand 2352 states and 6324 transitions. 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) [2021-03-10 14:36:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:24,358 INFO L93 Difference]: Finished difference Result 4060 states and 10675 transitions. [2021-03-10 14:36:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 14:36:24,358 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 46 [2021-03-10 14:36:24,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:24,362 INFO L225 Difference]: With dead ends: 4060 [2021-03-10 14:36:24,362 INFO L226 Difference]: Without dead ends: 3696 [2021-03-10 14:36:24,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-03-10 14:36:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-03-10 14:36:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 2370. [2021-03-10 14:36:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2369 states have (on average 2.6964964119881807) internal successors, (6388), 2369 states have internal predecessors, (6388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 6388 transitions. [2021-03-10 14:36:24,404 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 6388 transitions. Word has length 46 [2021-03-10 14:36:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:24,404 INFO L480 AbstractCegarLoop]: Abstraction has 2370 states and 6388 transitions. [2021-03-10 14:36:24,404 INFO L481 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) [2021-03-10 14:36:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 6388 transitions. [2021-03-10 14:36:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:24,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:24,408 INFO L519 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] [2021-03-10 14:36:24,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 14:36:24,622 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:24,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:24,623 INFO L82 PathProgramCache]: Analyzing trace with hash -191070329, now seen corresponding path program 1 times [2021-03-10 14:36:24,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:24,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477405745] [2021-03-10 14:36:24,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:24,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477405745] [2021-03-10 14:36:24,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76758764] [2021-03-10 14:36:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 14:36:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:24,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:24,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:24,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:24,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 14:36:24,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463859359] [2021-03-10 14:36:24,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 14:36:24,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:24,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 14:36:24,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:24,916 INFO L87 Difference]: Start difference. First operand 2370 states and 6388 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:25,144 INFO L93 Difference]: Finished difference Result 3635 states and 9256 transitions. [2021-03-10 14:36:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 14:36:25,144 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 14:36:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:25,147 INFO L225 Difference]: With dead ends: 3635 [2021-03-10 14:36:25,147 INFO L226 Difference]: Without dead ends: 3483 [2021-03-10 14:36:25,147 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-03-10 14:36:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2021-03-10 14:36:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 2483. [2021-03-10 14:36:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.67566478646253) internal successors, (6641), 2482 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 6641 transitions. [2021-03-10 14:36:25,179 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 6641 transitions. Word has length 46 [2021-03-10 14:36:25,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:25,179 INFO L480 AbstractCegarLoop]: Abstraction has 2483 states and 6641 transitions. [2021-03-10 14:36:25,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 6641 transitions. [2021-03-10 14:36:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:25,181 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:25,181 INFO L519 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] [2021-03-10 14:36:25,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:25,398 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:25,398 INFO L82 PathProgramCache]: Analyzing trace with hash -898156419, now seen corresponding path program 2 times [2021-03-10 14:36:25,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:25,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091169068] [2021-03-10 14:36:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:25,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091169068] [2021-03-10 14:36:25,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485972164] [2021-03-10 14:36:25,468 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 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 [2021-03-10 14:36:25,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:25,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:25,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:25,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:25,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 14:36:25,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783565389] [2021-03-10 14:36:25,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 14:36:25,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:25,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 14:36:25,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:25,636 INFO L87 Difference]: Start difference. First operand 2483 states and 6641 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:25,921 INFO L93 Difference]: Finished difference Result 4004 states and 10102 transitions. [2021-03-10 14:36:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 14:36:25,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 14:36:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:25,925 INFO L225 Difference]: With dead ends: 4004 [2021-03-10 14:36:25,925 INFO L226 Difference]: Without dead ends: 3852 [2021-03-10 14:36:25,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 14:36:25,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3852 states. [2021-03-10 14:36:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3852 to 2456. [2021-03-10 14:36:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.704276985743381) internal successors, (6639), 2455 states have internal predecessors, (6639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6639 transitions. [2021-03-10 14:36:25,963 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6639 transitions. Word has length 46 [2021-03-10 14:36:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:25,963 INFO L480 AbstractCegarLoop]: Abstraction has 2456 states and 6639 transitions. [2021-03-10 14:36:25,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:25,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6639 transitions. [2021-03-10 14:36:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:25,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:25,967 INFO L519 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] [2021-03-10 14:36:26,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 14:36:26,182 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:26,183 INFO L82 PathProgramCache]: Analyzing trace with hash -64874149, now seen corresponding path program 3 times [2021-03-10 14:36:26,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:26,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881117240] [2021-03-10 14:36:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:26,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881117240] [2021-03-10 14:36:26,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863043455] [2021-03-10 14:36:26,259 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 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 [2021-03-10 14:36:26,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 14:36:26,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:26,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:26,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:26,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 14:36:26,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985633336] [2021-03-10 14:36:26,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 14:36:26,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 14:36:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:26,453 INFO L87 Difference]: Start difference. First operand 2456 states and 6639 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:26,751 INFO L93 Difference]: Finished difference Result 3795 states and 9872 transitions. [2021-03-10 14:36:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 14:36:26,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 14:36:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:26,755 INFO L225 Difference]: With dead ends: 3795 [2021-03-10 14:36:26,756 INFO L226 Difference]: Without dead ends: 3643 [2021-03-10 14:36:26,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 14:36:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2021-03-10 14:36:26,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 2578. [2021-03-10 14:36:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.7167248738843615) internal successors, (7001), 2577 states have internal predecessors, (7001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 7001 transitions. [2021-03-10 14:36:26,792 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 7001 transitions. Word has length 46 [2021-03-10 14:36:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:26,792 INFO L480 AbstractCegarLoop]: Abstraction has 2578 states and 7001 transitions. [2021-03-10 14:36:26,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 7001 transitions. [2021-03-10 14:36:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 14:36:26,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:26,794 INFO L519 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] [2021-03-10 14:36:27,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 14:36:27,007 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:27,007 INFO L82 PathProgramCache]: Analyzing trace with hash -476267901, now seen corresponding path program 4 times [2021-03-10 14:36:27,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:27,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969361896] [2021-03-10 14:36:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:27,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969361896] [2021-03-10 14:36:27,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415635678] [2021-03-10 14:36:27,073 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 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 [2021-03-10 14:36:27,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:27,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:27,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 14:36:27,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:27,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:27,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 14:36:27,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094081252] [2021-03-10 14:36:27,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 14:36:27,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:27,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 14:36:27,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:27,241 INFO L87 Difference]: Start difference. First operand 2578 states and 7001 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:27,936 INFO L93 Difference]: Finished difference Result 5682 states and 14811 transitions. [2021-03-10 14:36:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 14:36:27,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 14:36:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:27,941 INFO L225 Difference]: With dead ends: 5682 [2021-03-10 14:36:27,941 INFO L226 Difference]: Without dead ends: 4884 [2021-03-10 14:36:27,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 583.8ms TimeCoverageRelationStatistics Valid=598, Invalid=2264, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 14:36:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2021-03-10 14:36:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 2696. [2021-03-10 14:36:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.706864564007421) internal successors, (7295), 2695 states have internal predecessors, (7295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 7295 transitions. [2021-03-10 14:36:27,983 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 7295 transitions. Word has length 46 [2021-03-10 14:36:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:27,983 INFO L480 AbstractCegarLoop]: Abstraction has 2696 states and 7295 transitions. [2021-03-10 14:36:27,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 7295 transitions. [2021-03-10 14:36:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:27,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:27,986 INFO L519 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] [2021-03-10 14:36:28,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:28,199 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:28,199 INFO L82 PathProgramCache]: Analyzing trace with hash -790685570, now seen corresponding path program 5 times [2021-03-10 14:36:28,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:28,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946088738] [2021-03-10 14:36:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:28,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946088738] [2021-03-10 14:36:28,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720280395] [2021-03-10 14:36:28,276 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 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 [2021-03-10 14:36:28,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 14:36:28,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:28,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:28,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:28,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 14:36:28,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740734946] [2021-03-10 14:36:28,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 14:36:28,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 14:36:28,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 14:36:28,465 INFO L87 Difference]: Start difference. First operand 2696 states and 7295 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:28,586 INFO L93 Difference]: Finished difference Result 3756 states and 9826 transitions. [2021-03-10 14:36:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 14:36:28,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:28,590 INFO L225 Difference]: With dead ends: 3756 [2021-03-10 14:36:28,590 INFO L226 Difference]: Without dead ends: 3604 [2021-03-10 14:36:28,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-03-10 14:36:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-03-10 14:36:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 2790. [2021-03-10 14:36:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 2.703836500537827) internal successors, (7541), 2789 states have internal predecessors, (7541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 7541 transitions. [2021-03-10 14:36:28,625 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 7541 transitions. Word has length 51 [2021-03-10 14:36:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:28,625 INFO L480 AbstractCegarLoop]: Abstraction has 2790 states and 7541 transitions. [2021-03-10 14:36:28,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 7541 transitions. [2021-03-10 14:36:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:28,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:28,628 INFO L519 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] [2021-03-10 14:36:28,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 14:36:28,843 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:28,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:28,843 INFO L82 PathProgramCache]: Analyzing trace with hash -342015500, now seen corresponding path program 6 times [2021-03-10 14:36:28,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:28,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457073698] [2021-03-10 14:36:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:28,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457073698] [2021-03-10 14:36:28,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903785377] [2021-03-10 14:36:28,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 14:36:28,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 14:36:28,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:28,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 14:36:28,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:29,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:29,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 14:36:29,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376078213] [2021-03-10 14:36:29,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 14:36:29,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:29,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 14:36:29,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 14:36:29,050 INFO L87 Difference]: Start difference. First operand 2790 states and 7541 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:29,308 INFO L93 Difference]: Finished difference Result 4643 states and 12214 transitions. [2021-03-10 14:36:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 14:36:29,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:29,328 INFO L225 Difference]: With dead ends: 4643 [2021-03-10 14:36:29,329 INFO L226 Difference]: Without dead ends: 4279 [2021-03-10 14:36:29,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-03-10 14:36:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-03-10 14:36:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 2751. [2021-03-10 14:36:29,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2750 states have (on average 2.7076363636363636) internal successors, (7446), 2750 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 7446 transitions. [2021-03-10 14:36:29,380 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 7446 transitions. Word has length 51 [2021-03-10 14:36:29,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:29,380 INFO L480 AbstractCegarLoop]: Abstraction has 2751 states and 7446 transitions. [2021-03-10 14:36:29,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 7446 transitions. [2021-03-10 14:36:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:29,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:29,384 INFO L519 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] [2021-03-10 14:36:29,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:29,602 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash -489773940, now seen corresponding path program 5 times [2021-03-10 14:36:29,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:29,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591688799] [2021-03-10 14:36:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:29,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591688799] [2021-03-10 14:36:29,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351948859] [2021-03-10 14:36:29,687 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 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 [2021-03-10 14:36:29,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 14:36:29,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:29,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:29,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:29,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:29,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 14:36:29,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637499927] [2021-03-10 14:36:29,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 14:36:29,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:29,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 14:36:29,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 14:36:29,951 INFO L87 Difference]: Start difference. First operand 2751 states and 7446 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:30,230 INFO L93 Difference]: Finished difference Result 4113 states and 10522 transitions. [2021-03-10 14:36:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 14:36:30,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:30,235 INFO L225 Difference]: With dead ends: 4113 [2021-03-10 14:36:30,235 INFO L226 Difference]: Without dead ends: 3961 [2021-03-10 14:36:30,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-03-10 14:36:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2021-03-10 14:36:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 2768. [2021-03-10 14:36:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2767 states have (on average 2.705818576075172) internal successors, (7487), 2767 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 7487 transitions. [2021-03-10 14:36:30,274 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 7487 transitions. Word has length 51 [2021-03-10 14:36:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:30,274 INFO L480 AbstractCegarLoop]: Abstraction has 2768 states and 7487 transitions. [2021-03-10 14:36:30,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 7487 transitions. [2021-03-10 14:36:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:30,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:30,277 INFO L519 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] [2021-03-10 14:36:30,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 14:36:30,491 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1898056490, now seen corresponding path program 6 times [2021-03-10 14:36:30,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:30,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404904660] [2021-03-10 14:36:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:30,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404904660] [2021-03-10 14:36:30,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628040371] [2021-03-10 14:36:30,565 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 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 [2021-03-10 14:36:30,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 14:36:30,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:30,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 14:36:30,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:30,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:30,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 14:36:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832783632] [2021-03-10 14:36:30,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 14:36:30,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:30,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 14:36:30,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 14:36:30,820 INFO L87 Difference]: Start difference. First operand 2768 states and 7487 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:31,115 INFO L93 Difference]: Finished difference Result 4171 states and 10851 transitions. [2021-03-10 14:36:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 14:36:31,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:31,122 INFO L225 Difference]: With dead ends: 4171 [2021-03-10 14:36:31,122 INFO L226 Difference]: Without dead ends: 4019 [2021-03-10 14:36:31,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 14:36:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2021-03-10 14:36:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 2860. [2021-03-10 14:36:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.7173837005946133) internal successors, (7769), 2859 states have internal predecessors, (7769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 7769 transitions. [2021-03-10 14:36:31,163 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 7769 transitions. Word has length 51 [2021-03-10 14:36:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:31,164 INFO L480 AbstractCegarLoop]: Abstraction has 2860 states and 7769 transitions. [2021-03-10 14:36:31,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 7769 transitions. [2021-03-10 14:36:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:31,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:31,167 INFO L519 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] [2021-03-10 14:36:31,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 14:36:31,379 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:31,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:31,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1992536988, now seen corresponding path program 7 times [2021-03-10 14:36:31,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:31,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560678961] [2021-03-10 14:36:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:31,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560678961] [2021-03-10 14:36:31,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983250105] [2021-03-10 14:36:31,457 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 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 [2021-03-10 14:36:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:31,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:31,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:31,975 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 14 [2021-03-10 14:36:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:31,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:31,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 14:36:31,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522479952] [2021-03-10 14:36:31,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 14:36:31,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:31,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 14:36:32,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 14:36:32,000 INFO L87 Difference]: Start difference. First operand 2860 states and 7769 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:32,590 INFO L93 Difference]: Finished difference Result 5767 states and 15035 transitions. [2021-03-10 14:36:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 14:36:32,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:32,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:32,596 INFO L225 Difference]: With dead ends: 5767 [2021-03-10 14:36:32,596 INFO L226 Difference]: Without dead ends: 5227 [2021-03-10 14:36:32,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 14:36:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2021-03-10 14:36:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 2711. [2021-03-10 14:36:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 2.7151291512915128) internal successors, (7358), 2710 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 7358 transitions. [2021-03-10 14:36:32,637 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 7358 transitions. Word has length 51 [2021-03-10 14:36:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:32,637 INFO L480 AbstractCegarLoop]: Abstraction has 2711 states and 7358 transitions. [2021-03-10 14:36:32,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 7358 transitions. [2021-03-10 14:36:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:32,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:32,640 INFO L519 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] [2021-03-10 14:36:32,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:32,854 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:32,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1343597350, now seen corresponding path program 8 times [2021-03-10 14:36:32,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:32,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843849811] [2021-03-10 14:36:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:32,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843849811] [2021-03-10 14:36:32,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471510070] [2021-03-10 14:36:32,930 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 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 [2021-03-10 14:36:32,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 14:36:32,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:32,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:32,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:33,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:33,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 14:36:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478351332] [2021-03-10 14:36:33,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 14:36:33,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:33,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 14:36:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 14:36:33,187 INFO L87 Difference]: Start difference. First operand 2711 states and 7358 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:33,513 INFO L93 Difference]: Finished difference Result 4252 states and 10800 transitions. [2021-03-10 14:36:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 14:36:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:33,518 INFO L225 Difference]: With dead ends: 4252 [2021-03-10 14:36:33,518 INFO L226 Difference]: Without dead ends: 4100 [2021-03-10 14:36:33,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 14:36:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-03-10 14:36:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 2711. [2021-03-10 14:36:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 2.7151291512915128) internal successors, (7358), 2710 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 7358 transitions. [2021-03-10 14:36:33,563 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 7358 transitions. Word has length 51 [2021-03-10 14:36:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:33,563 INFO L480 AbstractCegarLoop]: Abstraction has 2711 states and 7358 transitions. [2021-03-10 14:36:33,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 7358 transitions. [2021-03-10 14:36:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:33,566 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:33,566 INFO L519 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] [2021-03-10 14:36:33,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 14:36:33,771 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:33,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:33,771 INFO L82 PathProgramCache]: Analyzing trace with hash 636511260, now seen corresponding path program 9 times [2021-03-10 14:36:33,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:33,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572821850] [2021-03-10 14:36:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:33,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572821850] [2021-03-10 14:36:33,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144510278] [2021-03-10 14:36:33,845 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 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 [2021-03-10 14:36:33,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 14:36:33,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:33,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 14:36:33,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:34,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:34,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 14:36:34,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434757623] [2021-03-10 14:36:34,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 14:36:34,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:34,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 14:36:34,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 14:36:34,030 INFO L87 Difference]: Start difference. First operand 2711 states and 7358 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:34,379 INFO L93 Difference]: Finished difference Result 4634 states and 11743 transitions. [2021-03-10 14:36:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 14:36:34,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:34,383 INFO L225 Difference]: With dead ends: 4634 [2021-03-10 14:36:34,383 INFO L226 Difference]: Without dead ends: 4394 [2021-03-10 14:36:34,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 14:36:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-03-10 14:36:34,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 2811. [2021-03-10 14:36:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2811 states, 2810 states have (on average 2.718149466192171) internal successors, (7638), 2810 states have internal predecessors, (7638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 7638 transitions. [2021-03-10 14:36:34,419 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 7638 transitions. Word has length 51 [2021-03-10 14:36:34,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:34,419 INFO L480 AbstractCegarLoop]: Abstraction has 2811 states and 7638 transitions. [2021-03-10 14:36:34,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 7638 transitions. [2021-03-10 14:36:34,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:34,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:34,422 INFO L519 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] [2021-03-10 14:36:34,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 14:36:34,628 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:34,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1469793530, now seen corresponding path program 10 times [2021-03-10 14:36:34,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:34,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95221101] [2021-03-10 14:36:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:34,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95221101] [2021-03-10 14:36:34,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881377596] [2021-03-10 14:36:34,710 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 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 [2021-03-10 14:36:34,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 14:36:34,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:34,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:34,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 14:36:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:34,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 14:36:34,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 14:36:34,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595295535] [2021-03-10 14:36:34,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 14:36:34,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 14:36:34,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 14:36:34,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 14:36:34,968 INFO L87 Difference]: Start difference. First operand 2811 states and 7638 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 14:36:35,455 INFO L93 Difference]: Finished difference Result 4527 states and 11825 transitions. [2021-03-10 14:36:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 14:36:35,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 14:36:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 14:36:35,460 INFO L225 Difference]: With dead ends: 4527 [2021-03-10 14:36:35,460 INFO L226 Difference]: Without dead ends: 4375 [2021-03-10 14:36:35,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1202, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 14:36:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2021-03-10 14:36:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 2891. [2021-03-10 14:36:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2890 states have (on average 2.7294117647058824) internal successors, (7888), 2890 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 7888 transitions. [2021-03-10 14:36:35,499 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 7888 transitions. Word has length 51 [2021-03-10 14:36:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 14:36:35,499 INFO L480 AbstractCegarLoop]: Abstraction has 2891 states and 7888 transitions. [2021-03-10 14:36:35,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 14:36:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 7888 transitions. [2021-03-10 14:36:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 14:36:35,502 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 14:36:35,502 INFO L519 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] [2021-03-10 14:36:35,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-10 14:36:35,716 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 14:36:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 14:36:35,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1058399778, now seen corresponding path program 11 times [2021-03-10 14:36:35,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 14:36:35,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503858005] [2021-03-10 14:36:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 14:36:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 14:36:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 14:36:35,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503858005] [2021-03-10 14:36:35,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642926979] [2021-03-10 14:36:35,788 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 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 [2021-03-10 14:36:35,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 14:36:35,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 14:36:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 14:36:35,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown