/usr/bin/java -Xmx8000000000 -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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 15:04:46,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 15:04:46,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 15:04:46,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 15:04:46,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 15:04:46,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 15:04:46,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 15:04:46,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 15:04:46,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 15:04:46,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 15:04:46,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 15:04:46,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 15:04:46,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 15:04:46,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 15:04:46,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 15:04:46,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 15:04:46,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-12 15:04:46,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 15:04:46,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 15:04:46,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 15:04:46,557 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 15:04:46,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 15:04:46,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 15:04:46,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 15:04:46,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 15:04:46,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 15:04:46,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 15:04:46,595 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 15:04:46,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 15:04:46,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 15:04:46,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 15:04:46,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 15:04:46,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 15:04:46,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 15:04:46,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 15:04:46,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 15:04:46,614 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 15:04:46,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 15:04:46,614 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 15:04:46,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 15:04:46,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 15:04:46,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 15:04:46,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 15:04:46,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 15:04:46,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:04:46,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 15:04:46,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 15:04:46,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 15:04:46,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 15:04:46,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 15:04:46,616 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 15:04:46,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 15:04:46,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 15:04:46,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 15:04:46,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 15:04:46,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 15:04:46,885 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-12 15:04:46,887 INFO L275 PluginConnector]: CDTParser initialized [2021-06-12 15:04:46,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2021-06-12 15:04:46,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9545b1e70/a5a157d09aa941acb0d9d443264fcae5/FLAGf8d4c241a [2021-06-12 15:04:47,452 INFO L306 CDTParser]: Found 1 translation units. [2021-06-12 15:04:47,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2021-06-12 15:04:47,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9545b1e70/a5a157d09aa941acb0d9d443264fcae5/FLAGf8d4c241a [2021-06-12 15:04:47,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9545b1e70/a5a157d09aa941acb0d9d443264fcae5 [2021-06-12 15:04:47,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 15:04:47,971 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-12 15:04:47,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-12 15:04:47,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-12 15:04:47,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-12 15:04:47,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:04:47" (1/1) ... [2021-06-12 15:04:47,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a5796f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:47, skipping insertion in model container [2021-06-12 15:04:47,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:04:47" (1/1) ... [2021-06-12 15:04:47,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-12 15:04:48,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-12 15:04:48,366 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i[30920,30933] [2021-06-12 15:04:48,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:04:48,375 INFO L203 MainTranslator]: Completed pre-run [2021-06-12 15:04:48,414 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i[30920,30933] [2021-06-12 15:04:48,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:04:48,487 INFO L208 MainTranslator]: Completed translation [2021-06-12 15:04:48,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48 WrapperNode [2021-06-12 15:04:48,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-12 15:04:48,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 15:04:48,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 15:04:48,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 15:04:48,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (1/1) ... [2021-06-12 15:04:48,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (1/1) ... [2021-06-12 15:04:48,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 15:04:48,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 15:04:48,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 15:04:48,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 15:04:48,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (1/1) ... [2021-06-12 15:04:48,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (1/1) ... [2021-06-12 15:04:48,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (1/1) ... [2021-06-12 15:04:48,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (1/1) ... [2021-06-12 15:04:48,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (1/1) ... [2021-06-12 15:04:48,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (1/1) ... [2021-06-12 15:04:48,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (1/1) ... [2021-06-12 15:04:48,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 15:04:48,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 15:04:48,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 15:04:48,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 15:04:48,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:04:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-12 15:04:48,830 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-12 15:04:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-12 15:04:48,831 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-12 15:04:48,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-12 15:04:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-12 15:04:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-12 15:04:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-12 15:04:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-12 15:04:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-12 15:04:48,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 15:04:48,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 15:04:48,836 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 15:04:49,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 15:04:49,606 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-12 15:04:49,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:04:49 BoogieIcfgContainer [2021-06-12 15:04:49,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 15:04:49,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 15:04:49,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 15:04:49,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 15:04:49,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.06 03:04:47" (1/3) ... [2021-06-12 15:04:49,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e159cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:04:49, skipping insertion in model container [2021-06-12 15:04:49,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:48" (2/3) ... [2021-06-12 15:04:49,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e159cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:04:49, skipping insertion in model container [2021-06-12 15:04:49,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:04:49" (3/3) ... [2021-06-12 15:04:49,615 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2021-06-12 15:04:49,621 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 15:04:49,621 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 15:04:49,621 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 15:04:49,622 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 15:04:49,655 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,655 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,660 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,660 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,661 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,661 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,662 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,662 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,664 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,664 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,664 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,664 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,664 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,664 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,665 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,665 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,665 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,665 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,665 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,666 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,666 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,666 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,666 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,668 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,668 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,670 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,672 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,672 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,672 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,672 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,673 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,673 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,681 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,681 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,682 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,682 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,683 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:49,686 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-12 15:04:49,734 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 15:04:49,759 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:04:49,760 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:04:49,760 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:04:49,760 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:04:49,760 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:04:49,760 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:04:49,760 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:04:49,760 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 15:04:49,771 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-06-12 15:04:49,875 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 15:04:49,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:49,896 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:49,896 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-06-12 15:04:49,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:49,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238906638] [2021-06-12 15:04:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:50,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:50,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238906638] [2021-06-12 15:04:50,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238906638] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:50,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:50,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:04:50,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494189440] [2021-06-12 15:04:50,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:04:50,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:50,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:04:50,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:04:50,272 INFO L87 Difference]: Start difference. First operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:50,409 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-06-12 15:04:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 15:04:50,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 15:04:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:50,429 INFO L225 Difference]: With dead ends: 3996 [2021-06-12 15:04:50,429 INFO L226 Difference]: Without dead ends: 1425 [2021-06-12 15:04:50,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:04:50,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-12 15:04:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-06-12 15:04:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-06-12 15:04:50,551 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-06-12 15:04:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:50,551 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-06-12 15:04:50,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-06-12 15:04:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 15:04:50,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:50,555 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:50,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 15:04:50,556 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:50,556 INFO L82 PathProgramCache]: Analyzing trace with hash 352608555, now seen corresponding path program 1 times [2021-06-12 15:04:50,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:50,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124586008] [2021-06-12 15:04:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:50,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:50,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124586008] [2021-06-12 15:04:50,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124586008] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:50,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:50,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:04:50,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170728692] [2021-06-12 15:04:50,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:04:50,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:50,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:04:50,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:04:50,759 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:50,874 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-06-12 15:04:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:04:50,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 15:04:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:50,887 INFO L225 Difference]: With dead ends: 2025 [2021-06-12 15:04:50,887 INFO L226 Difference]: Without dead ends: 1758 [2021-06-12 15:04:50,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:04:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-12 15:04:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-06-12 15:04:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-06-12 15:04:50,937 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-06-12 15:04:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:50,938 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-06-12 15:04:50,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-06-12 15:04:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 15:04:50,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:50,941 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:50,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 15:04:50,942 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:50,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-06-12 15:04:50,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:50,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849721614] [2021-06-12 15:04:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:51,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:51,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849721614] [2021-06-12 15:04:51,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849721614] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:51,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:51,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:04:51,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555703120] [2021-06-12 15:04:51,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:04:51,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:51,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:04:51,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:04:51,097 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:51,194 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-06-12 15:04:51,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:04:51,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 15:04:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:51,202 INFO L225 Difference]: With dead ends: 2062 [2021-06-12 15:04:51,203 INFO L226 Difference]: Without dead ends: 1758 [2021-06-12 15:04:51,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:04:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-12 15:04:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-06-12 15:04:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-06-12 15:04:51,240 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-06-12 15:04:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:51,240 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-06-12 15:04:51,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-06-12 15:04:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 15:04:51,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:51,254 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:51,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 15:04:51,254 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:51,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-06-12 15:04:51,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:51,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115551140] [2021-06-12 15:04:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:51,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:51,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115551140] [2021-06-12 15:04:51,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115551140] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:51,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:51,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:04:51,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084368498] [2021-06-12 15:04:51,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:04:51,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:51,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:04:51,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:04:51,366 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:51,464 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-06-12 15:04:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 15:04:51,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 15:04:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:51,478 INFO L225 Difference]: With dead ends: 2318 [2021-06-12 15:04:51,478 INFO L226 Difference]: Without dead ends: 1987 [2021-06-12 15:04:51,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:04:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-12 15:04:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-06-12 15:04:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-06-12 15:04:51,528 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-06-12 15:04:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:51,529 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-06-12 15:04:51,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-06-12 15:04:51,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:04:51,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:51,531 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:51,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 15:04:51,531 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:51,532 INFO L82 PathProgramCache]: Analyzing trace with hash 476803984, now seen corresponding path program 1 times [2021-06-12 15:04:51,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:51,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063617369] [2021-06-12 15:04:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:51,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:51,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063617369] [2021-06-12 15:04:51,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063617369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:51,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682921931] [2021-06-12 15:04:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:04:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:51,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:04:51,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:51,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682921931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:51,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:51,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 15:04:51,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396346912] [2021-06-12 15:04:51,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:04:51,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:51,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:04:51,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:04:51,963 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:52,212 INFO L93 Difference]: Finished difference Result 2931 states and 7780 transitions. [2021-06-12 15:04:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 15:04:52,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-12 15:04:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:52,223 INFO L225 Difference]: With dead ends: 2931 [2021-06-12 15:04:52,223 INFO L226 Difference]: Without dead ends: 2549 [2021-06-12 15:04:52,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:04:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-06-12 15:04:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1814. [2021-06-12 15:04:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 2.724765581908439) internal successors, (4940), 1813 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4940 transitions. [2021-06-12 15:04:52,275 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4940 transitions. Word has length 42 [2021-06-12 15:04:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:52,276 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 4940 transitions. [2021-06-12 15:04:52,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4940 transitions. [2021-06-12 15:04:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:04:52,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:52,278 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:52,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:04:52,505 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:52,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:52,505 INFO L82 PathProgramCache]: Analyzing trace with hash -504897849, now seen corresponding path program 1 times [2021-06-12 15:04:52,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:52,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580045101] [2021-06-12 15:04:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:52,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:52,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580045101] [2021-06-12 15:04:52,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580045101] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:52,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:52,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:04:52,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48873346] [2021-06-12 15:04:52,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:04:52,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:04:52,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:04:52,591 INFO L87 Difference]: Start difference. First operand 1814 states and 4940 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:52,697 INFO L93 Difference]: Finished difference Result 2566 states and 6814 transitions. [2021-06-12 15:04:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:04:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-12 15:04:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:52,709 INFO L225 Difference]: With dead ends: 2566 [2021-06-12 15:04:52,710 INFO L226 Difference]: Without dead ends: 2414 [2021-06-12 15:04:52,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:04:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-12 15:04:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1902. [2021-06-12 15:04:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.7064702788006314) internal successors, (5145), 1901 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5145 transitions. [2021-06-12 15:04:52,761 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5145 transitions. Word has length 42 [2021-06-12 15:04:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:52,761 INFO L482 AbstractCegarLoop]: Abstraction has 1902 states and 5145 transitions. [2021-06-12 15:04:52,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5145 transitions. [2021-06-12 15:04:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:04:52,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:52,765 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:52,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 15:04:52,765 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:52,765 INFO L82 PathProgramCache]: Analyzing trace with hash -704490053, now seen corresponding path program 2 times [2021-06-12 15:04:52,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:52,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698065562] [2021-06-12 15:04:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:52,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:52,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698065562] [2021-06-12 15:04:52,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698065562] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:52,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:52,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:04:52,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113633538] [2021-06-12 15:04:52,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:04:52,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:52,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:04:52,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:04:52,884 INFO L87 Difference]: Start difference. First operand 1902 states and 5145 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:53,026 INFO L93 Difference]: Finished difference Result 2949 states and 7860 transitions. [2021-06-12 15:04:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:04:53,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-12 15:04:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:53,039 INFO L225 Difference]: With dead ends: 2949 [2021-06-12 15:04:53,039 INFO L226 Difference]: Without dead ends: 2682 [2021-06-12 15:04:53,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:04:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-12 15:04:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1866. [2021-06-12 15:04:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 2.72171581769437) internal successors, (5076), 1865 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 5076 transitions. [2021-06-12 15:04:53,130 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 5076 transitions. Word has length 42 [2021-06-12 15:04:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:53,132 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 5076 transitions. [2021-06-12 15:04:53,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 5076 transitions. [2021-06-12 15:04:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:04:53,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:53,135 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:53,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 15:04:53,135 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1574389667, now seen corresponding path program 3 times [2021-06-12 15:04:53,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:53,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175368277] [2021-06-12 15:04:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:53,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:53,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175368277] [2021-06-12 15:04:53,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175368277] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:53,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:53,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:04:53,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641136998] [2021-06-12 15:04:53,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:04:53,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:53,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:04:53,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:04:53,230 INFO L87 Difference]: Start difference. First operand 1866 states and 5076 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:53,420 INFO L93 Difference]: Finished difference Result 3342 states and 8950 transitions. [2021-06-12 15:04:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:04:53,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-12 15:04:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:53,442 INFO L225 Difference]: With dead ends: 3342 [2021-06-12 15:04:53,442 INFO L226 Difference]: Without dead ends: 2896 [2021-06-12 15:04:53,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:04:53,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2021-06-12 15:04:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 2103. [2021-06-12 15:04:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7121788772597526) internal successors, (5701), 2102 states have internal predecessors, (5701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5701 transitions. [2021-06-12 15:04:53,503 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5701 transitions. Word has length 42 [2021-06-12 15:04:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:53,503 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5701 transitions. [2021-06-12 15:04:53,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5701 transitions. [2021-06-12 15:04:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 15:04:53,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:53,506 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:53,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 15:04:53,507 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:53,507 INFO L82 PathProgramCache]: Analyzing trace with hash -965377150, now seen corresponding path program 1 times [2021-06-12 15:04:53,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:53,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623107596] [2021-06-12 15:04:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:53,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:53,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623107596] [2021-06-12 15:04:53,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623107596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:53,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411919784] [2021-06-12 15:04:53,599 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 [2021-06-12 15:04:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:53,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:04:53,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:53,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411919784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:53,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:53,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 15:04:53,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656632372] [2021-06-12 15:04:53,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:04:53,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:53,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:04:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:04:53,912 INFO L87 Difference]: Start difference. First operand 2103 states and 5701 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:54,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:54,059 INFO L93 Difference]: Finished difference Result 3026 states and 7980 transitions. [2021-06-12 15:04:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:04:54,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 15:04:54,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:54,067 INFO L225 Difference]: With dead ends: 3026 [2021-06-12 15:04:54,068 INFO L226 Difference]: Without dead ends: 2874 [2021-06-12 15:04:54,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:04:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-06-12 15:04:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2191. [2021-06-12 15:04:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 2.6968036529680366) internal successors, (5906), 2190 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 5906 transitions. [2021-06-12 15:04:54,137 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 5906 transitions. Word has length 47 [2021-06-12 15:04:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:54,138 INFO L482 AbstractCegarLoop]: Abstraction has 2191 states and 5906 transitions. [2021-06-12 15:04:54,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 5906 transitions. [2021-06-12 15:04:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 15:04:54,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:54,141 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:54,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 15:04:54,357 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:54,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1164969354, now seen corresponding path program 2 times [2021-06-12 15:04:54,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:54,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583295063] [2021-06-12 15:04:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:54,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:54,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583295063] [2021-06-12 15:04:54,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583295063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:54,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158936321] [2021-06-12 15:04:54,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:04:54,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:04:54,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:04:54,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:04:54,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:54,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158936321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:54,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:54,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 15:04:54,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812691205] [2021-06-12 15:04:54,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:04:54,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:04:54,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:04:54,880 INFO L87 Difference]: Start difference. First operand 2191 states and 5906 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:55,402 INFO L93 Difference]: Finished difference Result 4271 states and 11252 transitions. [2021-06-12 15:04:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:04:55,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 15:04:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:55,410 INFO L225 Difference]: With dead ends: 4271 [2021-06-12 15:04:55,410 INFO L226 Difference]: Without dead ends: 3561 [2021-06-12 15:04:55,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 504.9ms TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:04:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-12 15:04:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2325. [2021-06-12 15:04:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 2.7104130808950084) internal successors, (6299), 2324 states have internal predecessors, (6299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 6299 transitions. [2021-06-12 15:04:55,467 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 6299 transitions. Word has length 47 [2021-06-12 15:04:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:55,467 INFO L482 AbstractCegarLoop]: Abstraction has 2325 states and 6299 transitions. [2021-06-12 15:04:55,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 6299 transitions. [2021-06-12 15:04:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 15:04:55,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:55,471 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:55,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 15:04:55,681 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:55,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1589922218, now seen corresponding path program 1 times [2021-06-12 15:04:55,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:55,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095032804] [2021-06-12 15:04:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:55,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:55,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095032804] [2021-06-12 15:04:55,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095032804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:55,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108093154] [2021-06-12 15:04:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:04:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:55,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:04:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:56,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108093154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:56,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:56,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 15:04:56,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150833604] [2021-06-12 15:04:56,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:04:56,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:56,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:04:56,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:04:56,049 INFO L87 Difference]: Start difference. First operand 2325 states and 6299 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:56,416 INFO L93 Difference]: Finished difference Result 5225 states and 13859 transitions. [2021-06-12 15:04:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:04:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 15:04:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:56,426 INFO L225 Difference]: With dead ends: 5225 [2021-06-12 15:04:56,426 INFO L226 Difference]: Without dead ends: 4488 [2021-06-12 15:04:56,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:04:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4488 states. [2021-06-12 15:04:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4488 to 2392. [2021-06-12 15:04:56,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.7314930991217063) internal successors, (6531), 2391 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 6531 transitions. [2021-06-12 15:04:56,499 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 6531 transitions. Word has length 47 [2021-06-12 15:04:56,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:56,499 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 6531 transitions. [2021-06-12 15:04:56,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:56,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 6531 transitions. [2021-06-12 15:04:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:04:56,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:56,503 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:56,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 15:04:56,726 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash 107753584, now seen corresponding path program 2 times [2021-06-12 15:04:56,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:56,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269089268] [2021-06-12 15:04:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:56,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:56,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269089268] [2021-06-12 15:04:56,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269089268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:56,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429113885] [2021-06-12 15:04:56,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:04:56,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:04:56,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:04:56,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:04:56,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:57,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429113885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:57,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:57,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 15:04:57,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474070094] [2021-06-12 15:04:57,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:04:57,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:57,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:04:57,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:04:57,114 INFO L87 Difference]: Start difference. First operand 2392 states and 6531 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:57,350 INFO L93 Difference]: Finished difference Result 4172 states and 11147 transitions. [2021-06-12 15:04:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:04:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-12 15:04:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:57,358 INFO L225 Difference]: With dead ends: 4172 [2021-06-12 15:04:57,358 INFO L226 Difference]: Without dead ends: 3790 [2021-06-12 15:04:57,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:04:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2021-06-12 15:04:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 2692. [2021-06-12 15:04:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 2.7435897435897436) internal successors, (7383), 2691 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 7383 transitions. [2021-06-12 15:04:57,415 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 7383 transitions. Word has length 52 [2021-06-12 15:04:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:57,415 INFO L482 AbstractCegarLoop]: Abstraction has 2692 states and 7383 transitions. [2021-06-12 15:04:57,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 7383 transitions. [2021-06-12 15:04:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:04:57,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:57,419 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:57,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 15:04:57,633 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:57,633 INFO L82 PathProgramCache]: Analyzing trace with hash -873948249, now seen corresponding path program 3 times [2021-06-12 15:04:57,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:57,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477723678] [2021-06-12 15:04:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:57,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:57,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477723678] [2021-06-12 15:04:57,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477723678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:57,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957337282] [2021-06-12 15:04:57,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:04:57,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:04:57,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:04:57,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:04:57,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:58,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957337282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:58,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:58,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 15:04:58,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210810376] [2021-06-12 15:04:58,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:04:58,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:58,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:04:58,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:04:58,091 INFO L87 Difference]: Start difference. First operand 2692 states and 7383 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:58,290 INFO L93 Difference]: Finished difference Result 3829 states and 10132 transitions. [2021-06-12 15:04:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:04:58,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-12 15:04:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:58,298 INFO L225 Difference]: With dead ends: 3829 [2021-06-12 15:04:58,298 INFO L226 Difference]: Without dead ends: 3677 [2021-06-12 15:04:58,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:04:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2021-06-12 15:04:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 2779. [2021-06-12 15:04:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2778 states have (on average 2.7289416846652266) internal successors, (7581), 2778 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 7581 transitions. [2021-06-12 15:04:58,358 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 7581 transitions. Word has length 52 [2021-06-12 15:04:58,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:58,358 INFO L482 AbstractCegarLoop]: Abstraction has 2779 states and 7581 transitions. [2021-06-12 15:04:58,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 7581 transitions. [2021-06-12 15:04:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:04:58,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:58,363 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:58,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:04:58,577 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:58,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:58,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1073540453, now seen corresponding path program 4 times [2021-06-12 15:04:58,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:58,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152398475] [2021-06-12 15:04:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:58,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:58,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152398475] [2021-06-12 15:04:58,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152398475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:58,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488897530] [2021-06-12 15:04:58,675 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:04:58,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:04:58,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:04:58,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:04:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:58,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488897530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:58,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:58,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:04:58,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886365389] [2021-06-12 15:04:58,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:04:58,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:58,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:04:58,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:04:58,989 INFO L87 Difference]: Start difference. First operand 2779 states and 7581 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:59,406 INFO L93 Difference]: Finished difference Result 4833 states and 12979 transitions. [2021-06-12 15:04:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:04:59,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-12 15:04:59,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:59,416 INFO L225 Difference]: With dead ends: 4833 [2021-06-12 15:04:59,416 INFO L226 Difference]: Without dead ends: 4451 [2021-06-12 15:04:59,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:04:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-12 15:04:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 2806. [2021-06-12 15:04:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2805 states have (on average 2.736898395721925) internal successors, (7677), 2805 states have internal predecessors, (7677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 7677 transitions. [2021-06-12 15:04:59,481 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 7677 transitions. Word has length 52 [2021-06-12 15:04:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:59,481 INFO L482 AbstractCegarLoop]: Abstraction has 2806 states and 7677 transitions. [2021-06-12 15:04:59,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:04:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 7677 transitions. [2021-06-12 15:04:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:04:59,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:59,486 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:04:59,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 15:04:59,701 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:59,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1375261241, now seen corresponding path program 1 times [2021-06-12 15:04:59,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:59,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612029156] [2021-06-12 15:04:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:59,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:59,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612029156] [2021-06-12 15:04:59,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612029156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:59,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057232543] [2021-06-12 15:04:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:04:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:59,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:04:59,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:00,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057232543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:00,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:00,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:00,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281880864] [2021-06-12 15:05:00,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:00,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:00,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:00,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:00,057 INFO L87 Difference]: Start difference. First operand 2806 states and 7677 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:00,320 INFO L93 Difference]: Finished difference Result 4312 states and 11204 transitions. [2021-06-12 15:05:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:05:00,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-12 15:05:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:00,328 INFO L225 Difference]: With dead ends: 4312 [2021-06-12 15:05:00,329 INFO L226 Difference]: Without dead ends: 4008 [2021-06-12 15:05:00,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:05:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-12 15:05:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 2978. [2021-06-12 15:05:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.702384951293248) internal successors, (8045), 2977 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8045 transitions. [2021-06-12 15:05:00,407 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8045 transitions. Word has length 52 [2021-06-12 15:05:00,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:00,407 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8045 transitions. [2021-06-12 15:05:00,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8045 transitions. [2021-06-12 15:05:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:05:00,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:00,414 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:05:00,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:00,629 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash -705460755, now seen corresponding path program 2 times [2021-06-12 15:05:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:00,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130455776] [2021-06-12 15:05:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:00,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:00,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130455776] [2021-06-12 15:05:00,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130455776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:00,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028534475] [2021-06-12 15:05:00,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:00,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:05:00,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:00,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:05:00,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:00,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028534475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:00,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:00,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:00,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966988388] [2021-06-12 15:05:00,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:00,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:00,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:00,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:00,926 INFO L87 Difference]: Start difference. First operand 2978 states and 8045 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:01,299 INFO L93 Difference]: Finished difference Result 4936 states and 12772 transitions. [2021-06-12 15:05:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:05:01,299 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-12 15:05:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:01,305 INFO L225 Difference]: With dead ends: 4936 [2021-06-12 15:05:01,305 INFO L226 Difference]: Without dead ends: 4632 [2021-06-12 15:05:01,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:05:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-06-12 15:05:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 3133. [2021-06-12 15:05:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3133 states, 3132 states have (on average 2.7426564495530013) internal successors, (8590), 3132 states have internal predecessors, (8590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 8590 transitions. [2021-06-12 15:05:01,377 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 8590 transitions. Word has length 52 [2021-06-12 15:05:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:01,377 INFO L482 AbstractCegarLoop]: Abstraction has 3133 states and 8590 transitions. [2021-06-12 15:05:01,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 8590 transitions. [2021-06-12 15:05:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:05:01,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:01,382 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:05:01,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:01,597 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:01,597 INFO L82 PathProgramCache]: Analyzing trace with hash 610535787, now seen corresponding path program 3 times [2021-06-12 15:05:01,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:01,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973959185] [2021-06-12 15:05:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:01,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:01,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973959185] [2021-06-12 15:05:01,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973959185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:01,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43933477] [2021-06-12 15:05:01,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:01,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 15:05:01,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:05:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:01,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43933477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:01,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:01,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:01,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014999078] [2021-06-12 15:05:01,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:01,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:01,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:01,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:01,971 INFO L87 Difference]: Start difference. First operand 3133 states and 8590 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:02,372 INFO L93 Difference]: Finished difference Result 5131 states and 13622 transitions. [2021-06-12 15:05:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:05:02,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-12 15:05:02,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:02,379 INFO L225 Difference]: With dead ends: 5131 [2021-06-12 15:05:02,380 INFO L226 Difference]: Without dead ends: 4827 [2021-06-12 15:05:02,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 379.6ms TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:05:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4827 states. [2021-06-12 15:05:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4827 to 3149. [2021-06-12 15:05:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 2.7461880559085134) internal successors, (8645), 3148 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 8645 transitions. [2021-06-12 15:05:02,448 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 8645 transitions. Word has length 52 [2021-06-12 15:05:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:02,448 INFO L482 AbstractCegarLoop]: Abstraction has 3149 states and 8645 transitions. [2021-06-12 15:05:02,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 8645 transitions. [2021-06-12 15:05:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:05:02,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:02,452 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:05:02,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:02,676 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 550068275, now seen corresponding path program 4 times [2021-06-12 15:05:02,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:02,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406998135] [2021-06-12 15:05:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:02,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:02,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406998135] [2021-06-12 15:05:02,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406998135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:02,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727694252] [2021-06-12 15:05:02,751 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:02,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:05:02,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:02,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:05:02,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:03,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727694252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:03,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:03,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:03,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913558457] [2021-06-12 15:05:03,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:03,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:03,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:03,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:03,005 INFO L87 Difference]: Start difference. First operand 3149 states and 8645 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:03,741 INFO L93 Difference]: Finished difference Result 6785 states and 18364 transitions. [2021-06-12 15:05:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:05:03,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-12 15:05:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:03,747 INFO L225 Difference]: With dead ends: 6785 [2021-06-12 15:05:03,748 INFO L226 Difference]: Without dead ends: 6109 [2021-06-12 15:05:03,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=507, Invalid=1749, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:05:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2021-06-12 15:05:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 3407. [2021-06-12 15:05:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 3406 states have (on average 2.768349970640047) internal successors, (9429), 3406 states have internal predecessors, (9429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 9429 transitions. [2021-06-12 15:05:03,823 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 9429 transitions. Word has length 52 [2021-06-12 15:05:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:03,824 INFO L482 AbstractCegarLoop]: Abstraction has 3407 states and 9429 transitions. [2021-06-12 15:05:03,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 9429 transitions. [2021-06-12 15:05:03,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 15:05:03,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:03,828 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:05:04,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 15:05:04,042 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1774703266, now seen corresponding path program 5 times [2021-06-12 15:05:04,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:04,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826172788] [2021-06-12 15:05:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:04,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:04,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826172788] [2021-06-12 15:05:04,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826172788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:04,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197080506] [2021-06-12 15:05:04,134 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:04,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:05:04,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:04,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:05:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:04,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197080506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:04,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:04,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 15:05:04,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290244303] [2021-06-12 15:05:04,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:05:04,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:04,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:05:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:05:04,467 INFO L87 Difference]: Start difference. First operand 3407 states and 9429 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:04,629 INFO L93 Difference]: Finished difference Result 4692 states and 12647 transitions. [2021-06-12 15:05:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:05:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-12 15:05:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:04,635 INFO L225 Difference]: With dead ends: 4692 [2021-06-12 15:05:04,635 INFO L226 Difference]: Without dead ends: 4540 [2021-06-12 15:05:04,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:05:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-06-12 15:05:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 3535. [2021-06-12 15:05:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7637238256932655) internal successors, (9767), 3534 states have internal predecessors, (9767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9767 transitions. [2021-06-12 15:05:04,696 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9767 transitions. Word has length 57 [2021-06-12 15:05:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:04,696 INFO L482 AbstractCegarLoop]: Abstraction has 3535 states and 9767 transitions. [2021-06-12 15:05:04,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:04,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9767 transitions. [2021-06-12 15:05:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 15:05:04,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:04,701 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:05:04,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:04,917 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1575111062, now seen corresponding path program 6 times [2021-06-12 15:05:04,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:04,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165551706] [2021-06-12 15:05:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:05,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:05,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165551706] [2021-06-12 15:05:05,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165551706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:05,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320414327] [2021-06-12 15:05:05,016 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:05,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:05:05,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:05,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:05:05,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:05,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320414327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:05,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:05,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 15:05:05,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201922325] [2021-06-12 15:05:05,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:05:05,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:05,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:05:05,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:05:05,447 INFO L87 Difference]: Start difference. First operand 3535 states and 9767 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:05,936 INFO L93 Difference]: Finished difference Result 6576 states and 17655 transitions. [2021-06-12 15:05:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:05:05,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-12 15:05:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:05,942 INFO L225 Difference]: With dead ends: 6576 [2021-06-12 15:05:05,942 INFO L226 Difference]: Without dead ends: 6018 [2021-06-12 15:05:05,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:05:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2021-06-12 15:05:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 3424. [2021-06-12 15:05:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 2.7788489628980426) internal successors, (9512), 3423 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 9512 transitions. [2021-06-12 15:05:06,005 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 9512 transitions. Word has length 57 [2021-06-12 15:05:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:06,005 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 9512 transitions. [2021-06-12 15:05:06,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 9512 transitions. [2021-06-12 15:05:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 15:05:06,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:06,010 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:05:06,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 15:05:06,234 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:06,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:06,235 INFO L82 PathProgramCache]: Analyzing trace with hash -271054540, now seen corresponding path program 5 times [2021-06-12 15:05:06,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:06,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670381132] [2021-06-12 15:05:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:06,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:06,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670381132] [2021-06-12 15:05:06,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670381132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:06,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710177090] [2021-06-12 15:05:06,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:06,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 15:05:06,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:06,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:05:06,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:06,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710177090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:06,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:06,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 15:05:06,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657549939] [2021-06-12 15:05:06,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:05:06,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:06,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:05:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:05:06,674 INFO L87 Difference]: Start difference. First operand 3424 states and 9512 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:07,072 INFO L93 Difference]: Finished difference Result 5340 states and 14012 transitions. [2021-06-12 15:05:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:05:07,072 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-12 15:05:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:07,079 INFO L225 Difference]: With dead ends: 5340 [2021-06-12 15:05:07,079 INFO L226 Difference]: Without dead ends: 4948 [2021-06-12 15:05:07,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:05:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2021-06-12 15:05:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 3552. [2021-06-12 15:05:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 2.758941143339904) internal successors, (9797), 3551 states have internal predecessors, (9797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 9797 transitions. [2021-06-12 15:05:07,252 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 9797 transitions. Word has length 57 [2021-06-12 15:05:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:07,253 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 9797 transitions. [2021-06-12 15:05:07,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 9797 transitions. [2021-06-12 15:05:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 15:05:07,259 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:07,259 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:05:07,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:07,473 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1943190760, now seen corresponding path program 6 times [2021-06-12 15:05:07,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:07,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879226113] [2021-06-12 15:05:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:07,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:07,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879226113] [2021-06-12 15:05:07,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879226113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:07,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980832700] [2021-06-12 15:05:07,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:07,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 15:05:07,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:07,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:05:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:07,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980832700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:07,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:07,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 15:05:07,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308630271] [2021-06-12 15:05:07,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:05:07,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:05:07,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:05:07,922 INFO L87 Difference]: Start difference. First operand 3552 states and 9797 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:08,422 INFO L93 Difference]: Finished difference Result 5417 states and 14247 transitions. [2021-06-12 15:05:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:05:08,422 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-12 15:05:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:08,429 INFO L225 Difference]: With dead ends: 5417 [2021-06-12 15:05:08,430 INFO L226 Difference]: Without dead ends: 5265 [2021-06-12 15:05:08,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:05:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2021-06-12 15:05:08,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 3672. [2021-06-12 15:05:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3671 states have (on average 2.7709071097793516) internal successors, (10172), 3671 states have internal predecessors, (10172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:08,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 10172 transitions. [2021-06-12 15:05:08,501 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 10172 transitions. Word has length 57 [2021-06-12 15:05:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:08,501 INFO L482 AbstractCegarLoop]: Abstraction has 3672 states and 10172 transitions. [2021-06-12 15:05:08,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 10172 transitions. [2021-06-12 15:05:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 15:05:08,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:08,506 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:05:08,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 15:05:08,729 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1035779994, now seen corresponding path program 7 times [2021-06-12 15:05:08,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:08,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238962604] [2021-06-12 15:05:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:08,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:08,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238962604] [2021-06-12 15:05:08,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238962604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:08,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042766374] [2021-06-12 15:05:08,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:08,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:05:08,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:09,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042766374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:09,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:09,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 15:05:09,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677515802] [2021-06-12 15:05:09,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:05:09,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:09,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:05:09,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:05:09,222 INFO L87 Difference]: Start difference. First operand 3672 states and 10172 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:09,889 INFO L93 Difference]: Finished difference Result 6477 states and 17215 transitions. [2021-06-12 15:05:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:05:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-12 15:05:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:09,896 INFO L225 Difference]: With dead ends: 6477 [2021-06-12 15:05:09,896 INFO L226 Difference]: Without dead ends: 6085 [2021-06-12 15:05:09,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 639.0ms TimeCoverageRelationStatistics Valid=377, Invalid=1429, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:05:09,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-06-12 15:05:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 3980. [2021-06-12 15:05:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3980 states, 3979 states have (on average 2.80120633324956) internal successors, (11146), 3979 states have internal predecessors, (11146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3980 states to 3980 states and 11146 transitions. [2021-06-12 15:05:09,972 INFO L78 Accepts]: Start accepts. Automaton has 3980 states and 11146 transitions. Word has length 57 [2021-06-12 15:05:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:09,973 INFO L482 AbstractCegarLoop]: Abstraction has 3980 states and 11146 transitions. [2021-06-12 15:05:09,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:05:09,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3980 states and 11146 transitions. [2021-06-12 15:05:09,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 15:05:09,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:09,979 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:05:10,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:10,180 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:10,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:10,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1096247506, now seen corresponding path program 8 times [2021-06-12 15:05:10,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:10,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088266012] [2021-06-12 15:05:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:10,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:10,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088266012] [2021-06-12 15:05:10,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088266012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:10,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052798108] [2021-06-12 15:05:10,359 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:10,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:05:10,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:10,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:05:10,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:20,403 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 1639 [2021-06-12 15:05:20,784 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 1639 [2021-06-12 15:05:21,580 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 1653 DAG size of output: 1653 [2021-06-12 15:05:22,031 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 1653 DAG size of output: 1653 Received shutdown request... [2021-06-12 15:19:26,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:19:26,130 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 15:19:26,132 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 15:19:26,133 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 15:19:26,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 03:19:26 BasicIcfg [2021-06-12 15:19:26,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 15:19:26,134 INFO L168 Benchmark]: Toolchain (without parser) took 878162.85 ms. Allocated memory was 200.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 163.0 MB in the beginning and 807.7 MB in the end (delta: -644.8 MB). Peak memory consumption was 937.8 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:26,134 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 200.3 MB. Free memory is still 182.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:19:26,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 516.55 ms. Allocated memory is still 200.3 MB. Free memory was 162.5 MB in the beginning and 164.2 MB in the end (delta: -1.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:26,134 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.30 ms. Allocated memory is still 200.3 MB. Free memory was 164.2 MB in the beginning and 162.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:26,134 INFO L168 Benchmark]: Boogie Preprocessor took 31.91 ms. Allocated memory is still 200.3 MB. Free memory was 162.4 MB in the beginning and 161.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:26,134 INFO L168 Benchmark]: RCFGBuilder took 1034.16 ms. Allocated memory is still 200.3 MB. Free memory was 161.0 MB in the beginning and 140.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:26,134 INFO L168 Benchmark]: TraceAbstraction took 876523.93 ms. Allocated memory was 200.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 139.6 MB in the beginning and 807.7 MB in the end (delta: -668.2 MB). Peak memory consumption was 912.7 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:26,134 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 200.3 MB. Free memory is still 182.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 516.55 ms. Allocated memory is still 200.3 MB. Free memory was 162.5 MB in the beginning and 164.2 MB in the end (delta: -1.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 51.30 ms. Allocated memory is still 200.3 MB. Free memory was 164.2 MB in the beginning and 162.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.91 ms. Allocated memory is still 200.3 MB. Free memory was 162.4 MB in the beginning and 161.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1034.16 ms. Allocated memory is still 200.3 MB. Free memory was 161.0 MB in the beginning and 140.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 876523.93 ms. Allocated memory was 200.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 139.6 MB in the beginning and 807.7 MB in the end (delta: -668.2 MB). Peak memory consumption was 912.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 730]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 58 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 87 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 876372.9ms, OverallIterations: 24, TraceHistogramMax: 4, EmptinessCheckTime: 108.0ms, AutomataDifference: 7291.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 114.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2161 SDtfs, 11871 SDslu, 16816 SDs, 0 SdLazy, 2781 SolverSat, 692 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1714.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1311 GetRequests, 754 SyntacticMatches, 2 SemanticMatches, 555 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 6641.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3980occurred in iteration=23, InterpolantAutomatonStates: 495, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1606.3ms AutomataMinimizationTime, 23 MinimizatonAttempts, 27741 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 227.7ms SsaConstructionTime, 565.0ms SatisfiabilityAnalysisTime, 6023.3ms InterpolantComputationTime, 1933 NumberOfCodeBlocks, 1933 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 1894 ConstructedInterpolants, 0 QuantifiedInterpolants, 13896 SizeOfPredicates, 32 NumberOfNonLiveVariables, 2106 ConjunctsInSsa, 176 ConjunctsInUnsatCore, 39 InterpolantComputations, 7 PerfectInterpolantSequences, 0/276 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown