/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 18:06:36,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 18:06:36,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 18:06:36,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 18:06:36,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 18:06:36,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 18:06:36,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 18:06:36,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 18:06:36,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 18:06:36,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 18:06:36,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 18:06:36,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 18:06:36,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 18:06:36,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 18:06:36,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 18:06:36,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 18:06:36,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 18:06:36,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 18:06:36,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 18:06:36,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 18:06:36,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 18:06:36,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 18:06:36,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 18:06:36,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 18:06:36,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-20 18:06:36,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 18:06:36,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 18:06:36,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 18:06:36,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 18:06:36,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 18:06:36,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 18:06:36,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 18:06:36,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 18:06:36,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 18:06:36,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 18:06:36,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 18:06:36,792 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-keepdead.epf [2021-01-20 18:06:36,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 18:06:36,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 18:06:36,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 18:06:36,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 18:06:36,823 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 18:06:36,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 18:06:36,824 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 18:06:36,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 18:06:36,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 18:06:36,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 18:06:36,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 18:06:36,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 18:06:36,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 18:06:36,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 18:06:36,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 18:06:36,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 18:06:36,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 18:06:36,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 18:06:36,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 18:06:36,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 18:06:36,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 18:06:36,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 18:06:36,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 18:06:36,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 18:06:36,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 18:06:36,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 18:06:36,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 18:06:36,828 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 18:06:36,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 18:06:36,829 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2021-01-20 18:06:36,829 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 18:06:36,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 18:06:37,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 18:06:37,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 18:06:37,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 18:06:37,233 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 18:06:37,234 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 18:06:37,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-01-20 18:06:37,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b54ba0d3a/6123c579e4d14a2fbb12ec26cbe4fe58/FLAGddc9e33ae [2021-01-20 18:06:38,311 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 18:06:38,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-01-20 18:06:38,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b54ba0d3a/6123c579e4d14a2fbb12ec26cbe4fe58/FLAGddc9e33ae [2021-01-20 18:06:38,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b54ba0d3a/6123c579e4d14a2fbb12ec26cbe4fe58 [2021-01-20 18:06:38,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 18:06:38,500 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 18:06:38,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 18:06:38,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 18:06:38,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 18:06:38,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 06:06:38" (1/1) ... [2021-01-20 18:06:38,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703c3e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:38, skipping insertion in model container [2021-01-20 18:06:38,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 06:06:38" (1/1) ... [2021-01-20 18:06:38,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 18:06:38,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 18:06:39,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 18:06:39,137 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 18:06:39,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 18:06:39,411 INFO L208 MainTranslator]: Completed translation [2021-01-20 18:06:39,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39 WrapperNode [2021-01-20 18:06:39,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 18:06:39,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 18:06:39,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 18:06:39,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 18:06:39,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (1/1) ... [2021-01-20 18:06:39,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (1/1) ... [2021-01-20 18:06:39,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 18:06:39,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 18:06:39,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 18:06:39,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 18:06:39,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (1/1) ... [2021-01-20 18:06:39,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (1/1) ... [2021-01-20 18:06:39,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (1/1) ... [2021-01-20 18:06:39,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (1/1) ... [2021-01-20 18:06:39,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (1/1) ... [2021-01-20 18:06:39,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (1/1) ... [2021-01-20 18:06:39,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (1/1) ... [2021-01-20 18:06:39,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 18:06:39,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 18:06:39,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 18:06:39,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 18:06:39,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 18:06:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 18:06:39,710 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 18:06:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 18:06:39,711 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 18:06:39,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 18:06:39,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 18:06:39,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 18:06:39,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 18:06:39,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 18:06:39,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 18:06:39,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 18:06:39,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 18:06:39,718 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-20 18:06:40,256 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 18:06:40,257 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 18:06:40,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 06:06:40 BoogieIcfgContainer [2021-01-20 18:06:40,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 18:06:40,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 18:06:40,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 18:06:40,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 18:06:40,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 06:06:38" (1/3) ... [2021-01-20 18:06:40,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d67ca53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 06:06:40, skipping insertion in model container [2021-01-20 18:06:40,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:06:39" (2/3) ... [2021-01-20 18:06:40,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d67ca53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 06:06:40, skipping insertion in model container [2021-01-20 18:06:40,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 06:06:40" (3/3) ... [2021-01-20 18:06:40,274 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-01-20 18:06:40,296 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 18:06:40,296 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 18:06:40,301 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 18:06:40,303 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 18:06:40,344 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,344 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,344 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,345 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,345 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,345 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,345 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,346 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,346 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,346 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,346 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,347 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,347 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,347 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,347 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,348 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,348 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,348 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,348 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,350 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,351 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,351 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,352 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,352 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,353 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,353 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,353 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,353 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,354 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,354 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,355 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,356 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,356 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,356 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,356 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,356 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,357 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,357 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,357 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,360 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,361 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,362 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,369 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,370 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,370 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,370 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,371 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:06:40,374 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 18:06:40,391 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 18:06:40,422 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 18:06:40,423 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 18:06:40,423 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 18:06:40,423 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 18:06:40,423 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 18:06:40,423 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 18:06:40,424 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 18:06:40,424 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 18:06:40,439 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2021-01-20 18:06:40,613 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:40,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 18:06:40,663 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:40,665 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:40,665 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1900887756, now seen corresponding path program 1 times [2021-01-20 18:06:40,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:40,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590326686] [2021-01-20 18:06:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:41,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590326686] [2021-01-20 18:06:41,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:06:41,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:06:41,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391573519] [2021-01-20 18:06:41,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:06:41,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:06:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:06:41,288 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:41,594 INFO L93 Difference]: Finished difference Result 3507 states and 10199 transitions. [2021-01-20 18:06:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 18:06:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-01-20 18:06:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:41,600 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:06:41,600 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 10199 transitions. Word has length 28 [2021-01-20 18:06:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:41,602 INFO L481 AbstractCegarLoop]: Abstraction has 3507 states and 10199 transitions. [2021-01-20 18:06:41,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 10199 transitions. [2021-01-20 18:06:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 18:06:41,614 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:41,614 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:41,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 18:06:41,615 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:41,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1614586761, now seen corresponding path program 1 times [2021-01-20 18:06:41,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:41,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171213532] [2021-01-20 18:06:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:41,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171213532] [2021-01-20 18:06:41,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:06:41,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:06:41,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117725843] [2021-01-20 18:06:41,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:06:41,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:41,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:06:41,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:06:41,858 INFO L87 Difference]: Start difference. First operand 3507 states and 10199 transitions. 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) [2021-01-20 18:06:42,156 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-01-20 18:06:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:42,328 INFO L93 Difference]: Finished difference Result 3987 states and 11599 transitions. [2021-01-20 18:06:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-20 18:06:42,330 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 [2021-01-20 18:06:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:42,331 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:06:42,332 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 11599 transitions. Word has length 32 [2021-01-20 18:06:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:42,332 INFO L481 AbstractCegarLoop]: Abstraction has 3987 states and 11599 transitions. [2021-01-20 18:06:42,333 INFO L482 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) [2021-01-20 18:06:42,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 11599 transitions. [2021-01-20 18:06:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 18:06:42,337 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:42,338 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:42,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 18:06:42,338 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:42,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:42,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1199752031, now seen corresponding path program 1 times [2021-01-20 18:06:42,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:42,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820270116] [2021-01-20 18:06:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:42,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820270116] [2021-01-20 18:06:42,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:06:42,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:06:42,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267399671] [2021-01-20 18:06:42,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:06:42,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:42,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:06:42,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:06:42,549 INFO L87 Difference]: Start difference. First operand 3987 states and 11599 transitions. 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) [2021-01-20 18:06:42,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:42,827 INFO L93 Difference]: Finished difference Result 5915 states and 17263 transitions. [2021-01-20 18:06:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 18:06:42,827 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 [2021-01-20 18:06:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:42,829 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:06:42,829 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 17263 transitions. Word has length 32 [2021-01-20 18:06:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:42,831 INFO L481 AbstractCegarLoop]: Abstraction has 5915 states and 17263 transitions. [2021-01-20 18:06:42,831 INFO L482 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) [2021-01-20 18:06:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 17263 transitions. [2021-01-20 18:06:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 18:06:42,836 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:42,837 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:42,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 18:06:42,837 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:42,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1202725261, now seen corresponding path program 2 times [2021-01-20 18:06:42,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:42,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627819123] [2021-01-20 18:06:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:43,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627819123] [2021-01-20 18:06:43,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:06:43,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:06:43,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155838639] [2021-01-20 18:06:43,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:06:43,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:43,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:06:43,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:06:43,053 INFO L87 Difference]: Start difference. First operand 5915 states and 17263 transitions. 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) [2021-01-20 18:06:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:43,265 INFO L93 Difference]: Finished difference Result 5915 states and 17199 transitions. [2021-01-20 18:06:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-20 18:06:43,266 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 [2021-01-20 18:06:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:43,270 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:06:43,270 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 17199 transitions. Word has length 32 [2021-01-20 18:06:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:43,271 INFO L481 AbstractCegarLoop]: Abstraction has 5915 states and 17199 transitions. [2021-01-20 18:06:43,272 INFO L482 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) [2021-01-20 18:06:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 17199 transitions. [2021-01-20 18:06:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:06:43,285 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:43,286 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:43,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 18:06:43,286 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:43,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1299742308, now seen corresponding path program 1 times [2021-01-20 18:06:43,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:43,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961653742] [2021-01-20 18:06:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:43,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961653742] [2021-01-20 18:06:43,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:06:43,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:06:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600134913] [2021-01-20 18:06:43,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:06:43,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:43,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:06:43,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:06:43,528 INFO L87 Difference]: Start difference. First operand 5915 states and 17199 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:43,837 INFO L93 Difference]: Finished difference Result 9179 states and 26799 transitions. [2021-01-20 18:06:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 18:06:43,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-01-20 18:06:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:43,849 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:06:43,849 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 26799 transitions. Word has length 36 [2021-01-20 18:06:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:43,850 INFO L481 AbstractCegarLoop]: Abstraction has 9179 states and 26799 transitions. [2021-01-20 18:06:43,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 26799 transitions. [2021-01-20 18:06:43,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:06:43,859 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:43,859 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:43,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-20 18:06:43,860 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1296769078, now seen corresponding path program 2 times [2021-01-20 18:06:43,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:43,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879013062] [2021-01-20 18:06:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:44,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879013062] [2021-01-20 18:06:44,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:06:44,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:06:44,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637989954] [2021-01-20 18:06:44,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:06:44,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:06:44,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:06:44,052 INFO L87 Difference]: Start difference. First operand 9179 states and 26799 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:44,428 INFO L93 Difference]: Finished difference Result 9243 states and 26927 transitions. [2021-01-20 18:06:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 18:06:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-01-20 18:06:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:44,430 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:06:44,430 INFO L78 Accepts]: Start accepts. Automaton has 9243 states and 26927 transitions. Word has length 36 [2021-01-20 18:06:44,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:44,433 INFO L481 AbstractCegarLoop]: Abstraction has 9243 states and 26927 transitions. [2021-01-20 18:06:44,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 9243 states and 26927 transitions. [2021-01-20 18:06:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:06:44,453 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:44,454 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:44,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 18:06:44,455 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:44,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1854918631, now seen corresponding path program 1 times [2021-01-20 18:06:44,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:44,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993242865] [2021-01-20 18:06:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:44,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993242865] [2021-01-20 18:06:44,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442475317] [2021-01-20 18:06:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:44,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:06:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:45,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:45,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:45,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-20 18:06:45,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608580011] [2021-01-20 18:06:45,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 18:06:45,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:45,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 18:06:45,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:06:45,044 INFO L87 Difference]: Start difference. First operand 9243 states and 26927 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:45,487 INFO L93 Difference]: Finished difference Result 10971 states and 31983 transitions. [2021-01-20 18:06:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 18:06:45,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 18:06:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:45,489 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:06:45,489 INFO L78 Accepts]: Start accepts. Automaton has 10971 states and 31983 transitions. Word has length 41 [2021-01-20 18:06:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:45,490 INFO L481 AbstractCegarLoop]: Abstraction has 10971 states and 31983 transitions. [2021-01-20 18:06:45,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 10971 states and 31983 transitions. [2021-01-20 18:06:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:06:45,582 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:45,582 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:45,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-20 18:06:45,783 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:45,785 INFO L82 PathProgramCache]: Analyzing trace with hash 467840107, now seen corresponding path program 2 times [2021-01-20 18:06:45,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:45,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15996947] [2021-01-20 18:06:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:45,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15996947] [2021-01-20 18:06:45,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117735502] [2021-01-20 18:06:45,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:46,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:06:46,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:06:46,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:06:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:46,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:06:46,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:46,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:46,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-20 18:06:46,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409040602] [2021-01-20 18:06:46,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:06:46,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:06:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:06:46,116 INFO L87 Difference]: Start difference. First operand 10971 states and 31983 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:46,619 INFO L93 Difference]: Finished difference Result 14043 states and 40943 transitions. [2021-01-20 18:06:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:06:46,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 18:06:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:46,621 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-01-20 18:06:46,621 INFO L78 Accepts]: Start accepts. Automaton has 14043 states and 40943 transitions. Word has length 41 [2021-01-20 18:06:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:46,621 INFO L481 AbstractCegarLoop]: Abstraction has 14043 states and 40943 transitions. [2021-01-20 18:06:46,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 14043 states and 40943 transitions. [2021-01-20 18:06:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:06:46,647 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:46,647 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:46,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:46,862 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1873860069, now seen corresponding path program 3 times [2021-01-20 18:06:46,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:46,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104849472] [2021-01-20 18:06:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:47,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104849472] [2021-01-20 18:06:47,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928855912] [2021-01-20 18:06:47,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:47,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 18:06:47,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:06:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:06:47,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:47,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:47,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:47,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-20 18:06:47,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964950220] [2021-01-20 18:06:47,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 18:06:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 18:06:47,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:06:47,262 INFO L87 Difference]: Start difference. First operand 14043 states and 40943 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:47,766 INFO L93 Difference]: Finished difference Result 17179 states and 50159 transitions. [2021-01-20 18:06:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 18:06:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 18:06:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:47,768 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-01-20 18:06:47,768 INFO L78 Accepts]: Start accepts. Automaton has 17179 states and 50159 transitions. Word has length 41 [2021-01-20 18:06:47,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:47,770 INFO L481 AbstractCegarLoop]: Abstraction has 17179 states and 50159 transitions. [2021-01-20 18:06:47,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 17179 states and 50159 transitions. [2021-01-20 18:06:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:06:47,785 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:47,785 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:48,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:48,001 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:48,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1870886839, now seen corresponding path program 4 times [2021-01-20 18:06:48,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:48,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301268835] [2021-01-20 18:06:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:48,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301268835] [2021-01-20 18:06:48,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831112590] [2021-01-20 18:06:48,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:48,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:06:48,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:06:48,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:06:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:48,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:06:48,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:48,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:48,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-20 18:06:48,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998641599] [2021-01-20 18:06:48,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:06:48,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:48,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:06:48,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:06:48,414 INFO L87 Difference]: Start difference. First operand 17179 states and 50159 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:49,070 INFO L93 Difference]: Finished difference Result 18523 states and 53999 transitions. [2021-01-20 18:06:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 18:06:49,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 18:06:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:49,072 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-01-20 18:06:49,073 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 53999 transitions. Word has length 41 [2021-01-20 18:06:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:49,073 INFO L481 AbstractCegarLoop]: Abstraction has 18523 states and 53999 transitions. [2021-01-20 18:06:49,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 53999 transitions. [2021-01-20 18:06:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:06:49,102 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:49,102 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:49,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:49,317 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:49,318 INFO L82 PathProgramCache]: Analyzing trace with hash 697126713, now seen corresponding path program 1 times [2021-01-20 18:06:49,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:49,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570038279] [2021-01-20 18:06:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:49,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570038279] [2021-01-20 18:06:49,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447064782] [2021-01-20 18:06:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:49,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:06:49,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:49,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:49,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:49,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-20 18:06:49,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940486270] [2021-01-20 18:06:49,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:06:49,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:49,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:06:49,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:06:49,766 INFO L87 Difference]: Start difference. First operand 18523 states and 53999 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:50,212 INFO L93 Difference]: Finished difference Result 20379 states and 59439 transitions. [2021-01-20 18:06:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 18:06:50,213 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:06:50,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:50,214 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-01-20 18:06:50,214 INFO L78 Accepts]: Start accepts. Automaton has 20379 states and 59439 transitions. Word has length 46 [2021-01-20 18:06:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:50,215 INFO L481 AbstractCegarLoop]: Abstraction has 20379 states and 59439 transitions. [2021-01-20 18:06:50,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 20379 states and 59439 transitions. [2021-01-20 18:06:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:06:50,242 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:50,244 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:50,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-20 18:06:50,458 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:50,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1275081845, now seen corresponding path program 2 times [2021-01-20 18:06:50,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:50,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123496321] [2021-01-20 18:06:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:50,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123496321] [2021-01-20 18:06:50,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502965694] [2021-01-20 18:06:50,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:50,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:06:50,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:06:50,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:06:50,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:50,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:06:50,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:50,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:50,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-20 18:06:50,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653698650] [2021-01-20 18:06:50,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:06:50,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:50,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:06:50,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:06:50,764 INFO L87 Difference]: Start difference. First operand 20379 states and 59439 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:51,489 INFO L93 Difference]: Finished difference Result 22491 states and 65583 transitions. [2021-01-20 18:06:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:06:51,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:06:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:51,492 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-01-20 18:06:51,493 INFO L78 Accepts]: Start accepts. Automaton has 22491 states and 65583 transitions. Word has length 46 [2021-01-20 18:06:51,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:51,493 INFO L481 AbstractCegarLoop]: Abstraction has 22491 states and 65583 transitions. [2021-01-20 18:06:51,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 22491 states and 65583 transitions. [2021-01-20 18:06:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:06:51,520 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:51,520 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:51,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:51,735 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash 130938117, now seen corresponding path program 3 times [2021-01-20 18:06:51,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:51,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288695373] [2021-01-20 18:06:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:51,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288695373] [2021-01-20 18:06:51,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287082182] [2021-01-20 18:06:51,916 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:51,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 18:06:51,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:06:51,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:06:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:52,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:52,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:52,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-20 18:06:52,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490490836] [2021-01-20 18:06:52,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:06:52,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:06:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:06:52,071 INFO L87 Difference]: Start difference. First operand 22491 states and 65583 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:52,435 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-01-20 18:06:52,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:52,762 INFO L93 Difference]: Finished difference Result 25627 states and 74799 transitions. [2021-01-20 18:06:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-20 18:06:52,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:06:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:52,765 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-01-20 18:06:52,765 INFO L78 Accepts]: Start accepts. Automaton has 25627 states and 74799 transitions. Word has length 46 [2021-01-20 18:06:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:52,766 INFO L481 AbstractCegarLoop]: Abstraction has 25627 states and 74799 transitions. [2021-01-20 18:06:52,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 25627 states and 74799 transitions. [2021-01-20 18:06:52,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:06:52,793 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:52,793 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:53,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:53,008 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash 127964887, now seen corresponding path program 4 times [2021-01-20 18:06:53,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:53,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716083568] [2021-01-20 18:06:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:53,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716083568] [2021-01-20 18:06:53,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998391717] [2021-01-20 18:06:53,138 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:53,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:06:53,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:06:53,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:06:53,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:53,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:06:53,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:53,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:53,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-20 18:06:53,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680848761] [2021-01-20 18:06:53,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:06:53,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:53,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:06:53,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:06:53,268 INFO L87 Difference]: Start difference. First operand 25627 states and 74799 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:53,807 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2021-01-20 18:06:54,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:54,087 INFO L93 Difference]: Finished difference Result 25691 states and 74927 transitions. [2021-01-20 18:06:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:06:54,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:06:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:54,088 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-01-20 18:06:54,088 INFO L78 Accepts]: Start accepts. Automaton has 25691 states and 74927 transitions. Word has length 46 [2021-01-20 18:06:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:54,089 INFO L481 AbstractCegarLoop]: Abstraction has 25691 states and 74927 transitions. [2021-01-20 18:06:54,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 25691 states and 74927 transitions. [2021-01-20 18:06:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:06:54,130 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:54,130 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:54,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 18:06:54,344 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:54,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:54,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1328082230, now seen corresponding path program 5 times [2021-01-20 18:06:54,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:54,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449910382] [2021-01-20 18:06:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:54,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449910382] [2021-01-20 18:06:54,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63544656] [2021-01-20 18:06:54,539 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:54,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 18:06:54,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:06:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:06:54,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:54,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:54,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:54,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 18:06:54,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145949888] [2021-01-20 18:06:54,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:06:54,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:54,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:06:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:06:54,719 INFO L87 Difference]: Start difference. First operand 25691 states and 74927 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:55,344 INFO L93 Difference]: Finished difference Result 27547 states and 80367 transitions. [2021-01-20 18:06:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:06:55,344 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:06:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:55,345 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-01-20 18:06:55,345 INFO L78 Accepts]: Start accepts. Automaton has 27547 states and 80367 transitions. Word has length 51 [2021-01-20 18:06:55,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:55,346 INFO L481 AbstractCegarLoop]: Abstraction has 27547 states and 80367 transitions. [2021-01-20 18:06:55,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 27547 states and 80367 transitions. [2021-01-20 18:06:55,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:06:55,374 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:55,374 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:55,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 18:06:55,589 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:55,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:55,590 INFO L82 PathProgramCache]: Analyzing trace with hash -861941604, now seen corresponding path program 6 times [2021-01-20 18:06:55,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:55,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518495882] [2021-01-20 18:06:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:55,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518495882] [2021-01-20 18:06:55,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097471757] [2021-01-20 18:06:55,758 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:55,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 18:06:55,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:06:55,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:06:55,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:55,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:06:55,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:55,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:55,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 18:06:55,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224833433] [2021-01-20 18:06:55,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:06:55,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:55,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:06:55,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:06:55,927 INFO L87 Difference]: Start difference. First operand 27547 states and 80367 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:56,600 INFO L93 Difference]: Finished difference Result 29275 states and 85423 transitions. [2021-01-20 18:06:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:06:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:06:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:56,602 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-01-20 18:06:56,602 INFO L78 Accepts]: Start accepts. Automaton has 29275 states and 85423 transitions. Word has length 51 [2021-01-20 18:06:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:56,602 INFO L481 AbstractCegarLoop]: Abstraction has 29275 states and 85423 transitions. [2021-01-20 18:06:56,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 29275 states and 85423 transitions. [2021-01-20 18:06:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:06:56,632 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:56,632 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:56,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 18:06:56,841 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:56,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1106515018, now seen corresponding path program 7 times [2021-01-20 18:06:56,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:56,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867276517] [2021-01-20 18:06:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:56,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867276517] [2021-01-20 18:06:56,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37223757] [2021-01-20 18:06:56,988 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:57,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:06:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:57,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:57,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:57,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 18:06:57,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707231527] [2021-01-20 18:06:57,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:06:57,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:57,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:06:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:06:57,121 INFO L87 Difference]: Start difference. First operand 29275 states and 85423 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:57,790 INFO L93 Difference]: Finished difference Result 31003 states and 90479 transitions. [2021-01-20 18:06:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 18:06:57,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:06:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:57,791 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-01-20 18:06:57,792 INFO L78 Accepts]: Start accepts. Automaton has 31003 states and 90479 transitions. Word has length 51 [2021-01-20 18:06:57,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:57,792 INFO L481 AbstractCegarLoop]: Abstraction has 31003 states and 90479 transitions. [2021-01-20 18:06:57,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 31003 states and 90479 transitions. [2021-01-20 18:06:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:06:57,825 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:57,825 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:58,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 18:06:58,041 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:58,042 INFO L82 PathProgramCache]: Analyzing trace with hash -186912122, now seen corresponding path program 8 times [2021-01-20 18:06:58,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:58,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399830129] [2021-01-20 18:06:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:58,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399830129] [2021-01-20 18:06:58,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500000574] [2021-01-20 18:06:58,201 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:58,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:06:58,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:06:58,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:06:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:58,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:06:58,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:58,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:58,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 18:06:58,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35231108] [2021-01-20 18:06:58,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:06:58,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:58,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:06:58,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:06:58,370 INFO L87 Difference]: Start difference. First operand 31003 states and 90479 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:06:59,286 INFO L93 Difference]: Finished difference Result 36235 states and 105735 transitions. [2021-01-20 18:06:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 18:06:59,288 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:06:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:06:59,288 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-01-20 18:06:59,289 INFO L78 Accepts]: Start accepts. Automaton has 36235 states and 105735 transitions. Word has length 51 [2021-01-20 18:06:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:06:59,289 INFO L481 AbstractCegarLoop]: Abstraction has 36235 states and 105735 transitions. [2021-01-20 18:06:59,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:06:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 36235 states and 105735 transitions. [2021-01-20 18:06:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:06:59,321 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:06:59,321 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:06:59,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 18:06:59,531 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:06:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:06:59,532 INFO L82 PathProgramCache]: Analyzing trace with hash 165163796, now seen corresponding path program 9 times [2021-01-20 18:06:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:06:59,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495763132] [2021-01-20 18:06:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:06:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:06:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:59,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495763132] [2021-01-20 18:06:59,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360330713] [2021-01-20 18:06:59,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:06:59,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 18:06:59,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:06:59,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:06:59,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:06:59,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:06:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:06:59,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:06:59,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 18:06:59,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327320067] [2021-01-20 18:06:59,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:06:59,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:06:59,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:06:59,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:06:59,876 INFO L87 Difference]: Start difference. First operand 36235 states and 105735 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:00,777 INFO L93 Difference]: Finished difference Result 39499 states and 115335 transitions. [2021-01-20 18:07:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:07:00,778 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:07:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:00,778 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-20 18:07:00,778 INFO L78 Accepts]: Start accepts. Automaton has 39499 states and 115335 transitions. Word has length 51 [2021-01-20 18:07:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:00,779 INFO L481 AbstractCegarLoop]: Abstraction has 39499 states and 115335 transitions. [2021-01-20 18:07:00,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 39499 states and 115335 transitions. [2021-01-20 18:07:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:07:00,799 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:00,799 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:00,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:01,000 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:01,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:01,000 INFO L82 PathProgramCache]: Analyzing trace with hash 162190566, now seen corresponding path program 10 times [2021-01-20 18:07:01,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:01,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539313] [2021-01-20 18:07:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:01,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539313] [2021-01-20 18:07:01,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987275027] [2021-01-20 18:07:01,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:01,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:07:01,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:01,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:07:01,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:01,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:01,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:01,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:01,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 18:07:01,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719398159] [2021-01-20 18:07:01,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:07:01,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:01,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:07:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:07:01,403 INFO L87 Difference]: Start difference. First operand 39499 states and 115335 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:02,229 INFO L93 Difference]: Finished difference Result 43211 states and 126087 transitions. [2021-01-20 18:07:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 18:07:02,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:07:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:02,230 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 18:07:02,231 INFO L78 Accepts]: Start accepts. Automaton has 43211 states and 126087 transitions. Word has length 51 [2021-01-20 18:07:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:02,231 INFO L481 AbstractCegarLoop]: Abstraction has 43211 states and 126087 transitions. [2021-01-20 18:07:02,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 43211 states and 126087 transitions. [2021-01-20 18:07:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:07:02,430 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:02,430 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:02,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:02,632 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash -688928278, now seen corresponding path program 11 times [2021-01-20 18:07:02,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:02,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882845984] [2021-01-20 18:07:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:02,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882845984] [2021-01-20 18:07:02,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187963649] [2021-01-20 18:07:02,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:02,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:07:02,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:02,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:07:02,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:02,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:02,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:02,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:07:02,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877533433] [2021-01-20 18:07:02,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:07:02,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:02,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:07:02,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:07:02,942 INFO L87 Difference]: Start difference. First operand 43211 states and 126087 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:03,714 INFO L93 Difference]: Finished difference Result 45323 states and 132295 transitions. [2021-01-20 18:07:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 18:07:03,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-01-20 18:07:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:03,716 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-01-20 18:07:03,716 INFO L78 Accepts]: Start accepts. Automaton has 45323 states and 132295 transitions. Word has length 56 [2021-01-20 18:07:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:03,717 INFO L481 AbstractCegarLoop]: Abstraction has 45323 states and 132295 transitions. [2021-01-20 18:07:03,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 45323 states and 132295 transitions. [2021-01-20 18:07:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:07:03,781 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:03,781 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:03,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-20 18:07:03,995 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:03,996 INFO L82 PathProgramCache]: Analyzing trace with hash -222787652, now seen corresponding path program 12 times [2021-01-20 18:07:03,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:03,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342972369] [2021-01-20 18:07:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:04,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342972369] [2021-01-20 18:07:04,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982278908] [2021-01-20 18:07:04,196 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:04,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:07:04,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:07:04,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:04,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:04,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:04,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:04,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-20 18:07:04,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419524882] [2021-01-20 18:07:04,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:07:04,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:04,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:07:04,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:07:04,409 INFO L87 Difference]: Start difference. First operand 45323 states and 132295 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:04,971 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-01-20 18:07:05,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:05,551 INFO L93 Difference]: Finished difference Result 47051 states and 137351 transitions. [2021-01-20 18:07:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:07:05,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 56 [2021-01-20 18:07:05,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:05,552 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=665, Unknown=0, NotChecked=0, Total=930 [2021-01-20 18:07:05,553 INFO L78 Accepts]: Start accepts. Automaton has 47051 states and 137351 transitions. Word has length 56 [2021-01-20 18:07:05,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:05,553 INFO L481 AbstractCegarLoop]: Abstraction has 47051 states and 137351 transitions. [2021-01-20 18:07:05,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 47051 states and 137351 transitions. [2021-01-20 18:07:05,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:07:05,593 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:05,593 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:05,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:05,800 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:05,801 INFO L82 PathProgramCache]: Analyzing trace with hash -467361066, now seen corresponding path program 13 times [2021-01-20 18:07:05,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:05,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713314704] [2021-01-20 18:07:05,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:05,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713314704] [2021-01-20 18:07:05,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468901716] [2021-01-20 18:07:05,950 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:07:06,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:06,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:06,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:06,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:07:06,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421613646] [2021-01-20 18:07:06,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:07:06,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:07:06,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:07:06,295 INFO L87 Difference]: Start difference. First operand 47051 states and 137351 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:07,013 INFO L93 Difference]: Finished difference Result 48907 states and 142791 transitions. [2021-01-20 18:07:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 18:07:07,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-01-20 18:07:07,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:07,020 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2021-01-20 18:07:07,020 INFO L78 Accepts]: Start accepts. Automaton has 48907 states and 142791 transitions. Word has length 56 [2021-01-20 18:07:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:07,020 INFO L481 AbstractCegarLoop]: Abstraction has 48907 states and 142791 transitions. [2021-01-20 18:07:07,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 48907 states and 142791 transitions. [2021-01-20 18:07:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:07:07,250 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:07,251 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:07,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-20 18:07:07,455 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash 452241830, now seen corresponding path program 14 times [2021-01-20 18:07:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:07,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983487663] [2021-01-20 18:07:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:07,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983487663] [2021-01-20 18:07:07,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999802306] [2021-01-20 18:07:07,630 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:07,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:07:07,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:07,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:07:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:07,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:07,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:07,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:07,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-20 18:07:07,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645867682] [2021-01-20 18:07:07,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:07:07,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:07,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:07:07,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:07:07,760 INFO L87 Difference]: Start difference. First operand 48907 states and 142791 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:08,881 INFO L93 Difference]: Finished difference Result 51019 states and 148935 transitions. [2021-01-20 18:07:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 18:07:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 56 [2021-01-20 18:07:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:08,882 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 18:07:08,882 INFO L78 Accepts]: Start accepts. Automaton has 51019 states and 148935 transitions. Word has length 56 [2021-01-20 18:07:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:08,883 INFO L481 AbstractCegarLoop]: Abstraction has 51019 states and 148935 transitions. [2021-01-20 18:07:08,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 51019 states and 148935 transitions. [2021-01-20 18:07:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:07:08,948 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:08,948 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:09,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 18:07:09,163 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:09,164 INFO L82 PathProgramCache]: Analyzing trace with hash 804317748, now seen corresponding path program 15 times [2021-01-20 18:07:09,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:09,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590387201] [2021-01-20 18:07:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:09,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590387201] [2021-01-20 18:07:09,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625550038] [2021-01-20 18:07:09,334 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:09,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 18:07:09,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:09,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:07:09,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:09,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:09,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:09,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:07:09,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153354515] [2021-01-20 18:07:09,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:07:09,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:09,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:07:09,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:07:09,491 INFO L87 Difference]: Start difference. First operand 51019 states and 148935 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:10,616 INFO L93 Difference]: Finished difference Result 54155 states and 158151 transitions. [2021-01-20 18:07:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:07:10,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-01-20 18:07:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:10,618 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-20 18:07:10,618 INFO L78 Accepts]: Start accepts. Automaton has 54155 states and 158151 transitions. Word has length 56 [2021-01-20 18:07:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:10,619 INFO L481 AbstractCegarLoop]: Abstraction has 54155 states and 158151 transitions. [2021-01-20 18:07:10,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 54155 states and 158151 transitions. [2021-01-20 18:07:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:07:10,665 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:10,665 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:10,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 18:07:10,881 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:10,882 INFO L82 PathProgramCache]: Analyzing trace with hash 801344518, now seen corresponding path program 16 times [2021-01-20 18:07:10,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:10,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481916974] [2021-01-20 18:07:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:11,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481916974] [2021-01-20 18:07:11,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556897484] [2021-01-20 18:07:11,109 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:11,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:07:11,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:11,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:07:11,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:11,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:11,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:11,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:11,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-01-20 18:07:11,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651202467] [2021-01-20 18:07:11,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:07:11,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:11,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:07:11,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:07:11,263 INFO L87 Difference]: Start difference. First operand 54155 states and 158151 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:12,645 INFO L93 Difference]: Finished difference Result 55499 states and 161991 transitions. [2021-01-20 18:07:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:07:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 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 56 [2021-01-20 18:07:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:12,646 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:07:12,647 INFO L78 Accepts]: Start accepts. Automaton has 55499 states and 161991 transitions. Word has length 56 [2021-01-20 18:07:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:12,647 INFO L481 AbstractCegarLoop]: Abstraction has 55499 states and 161991 transitions. [2021-01-20 18:07:12,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 55499 states and 161991 transitions. [2021-01-20 18:07:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:07:12,695 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:12,695 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:12,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 18:07:12,896 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash 548080699, now seen corresponding path program 17 times [2021-01-20 18:07:12,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:12,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483509964] [2021-01-20 18:07:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:13,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483509964] [2021-01-20 18:07:13,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722924925] [2021-01-20 18:07:13,095 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:13,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:07:13,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:13,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:07:13,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:13,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:13,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:13,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:07:13,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393334425] [2021-01-20 18:07:13,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:07:13,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:13,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:07:13,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:07:13,242 INFO L87 Difference]: Start difference. First operand 55499 states and 161991 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:13,879 INFO L93 Difference]: Finished difference Result 57483 states and 167815 transitions. [2021-01-20 18:07:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:07:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:07:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:13,881 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2021-01-20 18:07:13,881 INFO L78 Accepts]: Start accepts. Automaton has 57483 states and 167815 transitions. Word has length 61 [2021-01-20 18:07:13,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:13,882 INFO L481 AbstractCegarLoop]: Abstraction has 57483 states and 167815 transitions. [2021-01-20 18:07:13,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 57483 states and 167815 transitions. [2021-01-20 18:07:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:07:14,202 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:14,202 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:14,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 18:07:14,421 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash 503720845, now seen corresponding path program 18 times [2021-01-20 18:07:14,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:14,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007680453] [2021-01-20 18:07:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:14,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007680453] [2021-01-20 18:07:14,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375075928] [2021-01-20 18:07:14,637 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:14,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:07:14,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:14,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:07:14,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:14,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:14,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:14,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:14,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 18:07:14,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492095181] [2021-01-20 18:07:14,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:14,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:14,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:14,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:14,803 INFO L87 Difference]: Start difference. First operand 57483 states and 167815 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:15,647 INFO L93 Difference]: Finished difference Result 59339 states and 173255 transitions. [2021-01-20 18:07:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:07:15,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:07:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:15,648 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 18:07:15,648 INFO L78 Accepts]: Start accepts. Automaton has 59339 states and 173255 transitions. Word has length 61 [2021-01-20 18:07:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:15,649 INFO L481 AbstractCegarLoop]: Abstraction has 59339 states and 173255 transitions. [2021-01-20 18:07:15,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 59339 states and 173255 transitions. [2021-01-20 18:07:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:07:15,989 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:15,990 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:16,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:16,203 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1988537895, now seen corresponding path program 19 times [2021-01-20 18:07:16,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:16,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744011908] [2021-01-20 18:07:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:16,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744011908] [2021-01-20 18:07:16,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240607669] [2021-01-20 18:07:16,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:07:16,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:16,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:16,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:16,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:07:16,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856162291] [2021-01-20 18:07:16,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:07:16,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:16,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:07:16,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:07:16,549 INFO L87 Difference]: Start difference. First operand 59339 states and 173255 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:17,434 INFO L93 Difference]: Finished difference Result 61195 states and 178695 transitions. [2021-01-20 18:07:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 18:07:17,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:07:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:17,436 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=769, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 18:07:17,436 INFO L78 Accepts]: Start accepts. Automaton has 61195 states and 178695 transitions. Word has length 61 [2021-01-20 18:07:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:17,437 INFO L481 AbstractCegarLoop]: Abstraction has 61195 states and 178695 transitions. [2021-01-20 18:07:17,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 61195 states and 178695 transitions. [2021-01-20 18:07:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:07:17,507 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:17,507 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:17,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-20 18:07:17,708 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1084722953, now seen corresponding path program 20 times [2021-01-20 18:07:17,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:17,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125598718] [2021-01-20 18:07:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:17,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125598718] [2021-01-20 18:07:17,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576076432] [2021-01-20 18:07:17,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:17,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:07:17,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:17,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:07:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:18,030 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:18,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:18,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:18,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 18:07:18,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898985637] [2021-01-20 18:07:18,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:18,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:18,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:18,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:18,102 INFO L87 Difference]: Start difference. First operand 61195 states and 178695 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:19,323 INFO L93 Difference]: Finished difference Result 64523 states and 188423 transitions. [2021-01-20 18:07:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 18:07:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:07:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:19,324 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 18:07:19,324 INFO L78 Accepts]: Start accepts. Automaton has 64523 states and 188423 transitions. Word has length 61 [2021-01-20 18:07:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:19,325 INFO L481 AbstractCegarLoop]: Abstraction has 64523 states and 188423 transitions. [2021-01-20 18:07:19,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 64523 states and 188423 transitions. [2021-01-20 18:07:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:07:19,381 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:19,381 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:19,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:19,582 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2120210981, now seen corresponding path program 21 times [2021-01-20 18:07:19,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:19,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87631469] [2021-01-20 18:07:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:19,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87631469] [2021-01-20 18:07:19,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920055643] [2021-01-20 18:07:19,752 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:19,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 18:07:19,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:19,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:07:19,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:19,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:19,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:19,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:07:19,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590004278] [2021-01-20 18:07:19,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:07:19,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:07:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:07:19,892 INFO L87 Difference]: Start difference. First operand 64523 states and 188423 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:21,090 INFO L93 Difference]: Finished difference Result 66379 states and 193863 transitions. [2021-01-20 18:07:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:07:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:07:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:21,092 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=897, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 18:07:21,092 INFO L78 Accepts]: Start accepts. Automaton has 66379 states and 193863 transitions. Word has length 61 [2021-01-20 18:07:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:21,092 INFO L481 AbstractCegarLoop]: Abstraction has 66379 states and 193863 transitions. [2021-01-20 18:07:21,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 66379 states and 193863 transitions. [2021-01-20 18:07:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:07:21,151 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:21,151 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:21,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-20 18:07:21,357 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1255153419, now seen corresponding path program 22 times [2021-01-20 18:07:21,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:21,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929486412] [2021-01-20 18:07:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:21,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929486412] [2021-01-20 18:07:21,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542351324] [2021-01-20 18:07:21,555 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:21,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:07:21,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:07:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:21,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:21,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:21,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:21,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 18:07:21,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366135518] [2021-01-20 18:07:21,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:21,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:21,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:21,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:21,721 INFO L87 Difference]: Start difference. First operand 66379 states and 193863 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:23,193 INFO L93 Difference]: Finished difference Result 69259 states and 202247 transitions. [2021-01-20 18:07:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:07:23,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:07:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:23,195 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:07:23,195 INFO L78 Accepts]: Start accepts. Automaton has 69259 states and 202247 transitions. Word has length 61 [2021-01-20 18:07:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:23,195 INFO L481 AbstractCegarLoop]: Abstraction has 69259 states and 202247 transitions. [2021-01-20 18:07:23,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 69259 states and 202247 transitions. [2021-01-20 18:07:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:07:23,250 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:23,250 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:23,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:23,451 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:23,453 INFO L82 PathProgramCache]: Analyzing trace with hash -903077501, now seen corresponding path program 23 times [2021-01-20 18:07:23,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:23,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401421054] [2021-01-20 18:07:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:23,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401421054] [2021-01-20 18:07:23,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420244945] [2021-01-20 18:07:23,604 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:23,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:07:23,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:23,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:07:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:23,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:23,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:23,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:07:23,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113426187] [2021-01-20 18:07:23,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:07:23,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:23,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:07:23,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:07:23,732 INFO L87 Difference]: Start difference. First operand 69259 states and 202247 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:24,754 INFO L93 Difference]: Finished difference Result 72523 states and 211847 transitions. [2021-01-20 18:07:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:07:24,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:07:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:24,758 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:07:24,758 INFO L78 Accepts]: Start accepts. Automaton has 72523 states and 211847 transitions. Word has length 61 [2021-01-20 18:07:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:24,759 INFO L481 AbstractCegarLoop]: Abstraction has 72523 states and 211847 transitions. [2021-01-20 18:07:24,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 72523 states and 211847 transitions. [2021-01-20 18:07:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:07:25,191 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:25,191 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:07:25,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-20 18:07:25,392 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:25,395 INFO L82 PathProgramCache]: Analyzing trace with hash -906050731, now seen corresponding path program 24 times [2021-01-20 18:07:25,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:25,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448854328] [2021-01-20 18:07:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:25,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448854328] [2021-01-20 18:07:25,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250338769] [2021-01-20 18:07:25,559 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:25,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:07:25,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:25,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:07:25,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:25,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:25,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:25,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:25,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:07:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869894140] [2021-01-20 18:07:25,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:07:25,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:07:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:07:25,721 INFO L87 Difference]: Start difference. First operand 72523 states and 211847 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:27,045 INFO L93 Difference]: Finished difference Result 72587 states and 211975 transitions. [2021-01-20 18:07:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:07:27,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:07:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:27,047 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=988, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:07:27,047 INFO L78 Accepts]: Start accepts. Automaton has 72587 states and 211975 transitions. Word has length 61 [2021-01-20 18:07:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:27,048 INFO L481 AbstractCegarLoop]: Abstraction has 72587 states and 211975 transitions. [2021-01-20 18:07:27,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 72587 states and 211975 transitions. [2021-01-20 18:07:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:07:27,140 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:27,141 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-01-20 18:07:27,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:27,348 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:27,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1591649445, now seen corresponding path program 25 times [2021-01-20 18:07:27,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:27,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371069346] [2021-01-20 18:07:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:27,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371069346] [2021-01-20 18:07:27,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888047074] [2021-01-20 18:07:27,594 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:27,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:07:27,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:27,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:27,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:27,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:07:27,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131945790] [2021-01-20 18:07:27,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:27,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:27,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:27,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:27,779 INFO L87 Difference]: Start difference. First operand 72587 states and 211975 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:28,208 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-01-20 18:07:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:28,953 INFO L93 Difference]: Finished difference Result 74955 states and 218951 transitions. [2021-01-20 18:07:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 18:07:28,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2021-01-20 18:07:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:28,955 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 18:07:28,955 INFO L78 Accepts]: Start accepts. Automaton has 74955 states and 218951 transitions. Word has length 66 [2021-01-20 18:07:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:28,956 INFO L481 AbstractCegarLoop]: Abstraction has 74955 states and 218951 transitions. [2021-01-20 18:07:28,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 74955 states and 218951 transitions. [2021-01-20 18:07:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:07:29,048 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:29,048 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-01-20 18:07:29,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-20 18:07:29,251 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:29,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1636009299, now seen corresponding path program 26 times [2021-01-20 18:07:29,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:29,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228125054] [2021-01-20 18:07:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:29,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228125054] [2021-01-20 18:07:29,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170516543] [2021-01-20 18:07:29,480 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:29,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:07:29,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:07:29,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:29,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:29,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:29,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:29,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-20 18:07:29,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098091044] [2021-01-20 18:07:29,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:07:29,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:07:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:07:29,640 INFO L87 Difference]: Start difference. First operand 74955 states and 218951 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:31,222 INFO L93 Difference]: Finished difference Result 76811 states and 224391 transitions. [2021-01-20 18:07:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:07:31,223 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:07:31,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:31,224 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:07:31,224 INFO L78 Accepts]: Start accepts. Automaton has 76811 states and 224391 transitions. Word has length 66 [2021-01-20 18:07:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:31,225 INFO L481 AbstractCegarLoop]: Abstraction has 76811 states and 224391 transitions. [2021-01-20 18:07:31,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 76811 states and 224391 transitions. [2021-01-20 18:07:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:07:31,327 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:31,328 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-01-20 18:07:31,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:31,544 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:31,544 INFO L82 PathProgramCache]: Analyzing trace with hash -151192249, now seen corresponding path program 27 times [2021-01-20 18:07:31,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:31,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399712475] [2021-01-20 18:07:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:31,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399712475] [2021-01-20 18:07:31,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254061861] [2021-01-20 18:07:31,761 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:31,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:07:31,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:31,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:07:31,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:31,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:31,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:31,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:07:31,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572647642] [2021-01-20 18:07:31,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:31,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:31,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:31,938 INFO L87 Difference]: Start difference. First operand 76811 states and 224391 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:32,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:32,892 INFO L93 Difference]: Finished difference Result 78795 states and 230215 transitions. [2021-01-20 18:07:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 18:07:32,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2021-01-20 18:07:32,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:32,894 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 18:07:32,894 INFO L78 Accepts]: Start accepts. Automaton has 78795 states and 230215 transitions. Word has length 66 [2021-01-20 18:07:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:32,894 INFO L481 AbstractCegarLoop]: Abstraction has 78795 states and 230215 transitions. [2021-01-20 18:07:32,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 78795 states and 230215 transitions. [2021-01-20 18:07:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:07:33,407 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:33,407 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-01-20 18:07:33,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-20 18:07:33,613 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:33,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1070514199, now seen corresponding path program 28 times [2021-01-20 18:07:33,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:33,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236897432] [2021-01-20 18:07:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:33,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236897432] [2021-01-20 18:07:33,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848386592] [2021-01-20 18:07:33,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:33,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:07:33,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:07:33,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:33,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:33,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:33,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:33,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-20 18:07:33,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175425100] [2021-01-20 18:07:33,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:07:33,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:33,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:07:33,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:07:33,987 INFO L87 Difference]: Start difference. First operand 78795 states and 230215 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:35,199 INFO L93 Difference]: Finished difference Result 80395 states and 234887 transitions. [2021-01-20 18:07:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:07:35,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:07:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:35,201 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 18:07:35,201 INFO L78 Accepts]: Start accepts. Automaton has 80395 states and 234887 transitions. Word has length 66 [2021-01-20 18:07:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:35,201 INFO L481 AbstractCegarLoop]: Abstraction has 80395 states and 234887 transitions. [2021-01-20 18:07:35,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 80395 states and 234887 transitions. [2021-01-20 18:07:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:07:35,279 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:35,279 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-01-20 18:07:35,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 18:07:35,481 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash -19519163, now seen corresponding path program 29 times [2021-01-20 18:07:35,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:35,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148247486] [2021-01-20 18:07:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:36,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148247486] [2021-01-20 18:07:36,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134850769] [2021-01-20 18:07:36,006 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:36,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 18:07:36,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:36,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:07:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:36,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:36,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:36,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:07:36,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851497216] [2021-01-20 18:07:36,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:36,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:36,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:36,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:36,164 INFO L87 Difference]: Start difference. First operand 80395 states and 234887 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:37,330 INFO L93 Difference]: Finished difference Result 82123 states and 239943 transitions. [2021-01-20 18:07:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:07:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2021-01-20 18:07:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:37,332 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 18:07:37,332 INFO L78 Accepts]: Start accepts. Automaton has 82123 states and 239943 transitions. Word has length 66 [2021-01-20 18:07:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:37,333 INFO L481 AbstractCegarLoop]: Abstraction has 82123 states and 239943 transitions. [2021-01-20 18:07:37,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 82123 states and 239943 transitions. [2021-01-20 18:07:37,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:07:37,426 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:37,426 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-01-20 18:07:37,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 18:07:37,635 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:37,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash 900083733, now seen corresponding path program 30 times [2021-01-20 18:07:37,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:37,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577276841] [2021-01-20 18:07:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:37,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577276841] [2021-01-20 18:07:37,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533126191] [2021-01-20 18:07:37,868 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:37,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 18:07:37,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:07:37,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:38,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:38,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:38,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:38,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-20 18:07:38,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839352182] [2021-01-20 18:07:38,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:07:38,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:38,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:07:38,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:07:38,066 INFO L87 Difference]: Start difference. First operand 82123 states and 239943 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:39,329 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-01-20 18:07:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:39,855 INFO L93 Difference]: Finished difference Result 85003 states and 248327 transitions. [2021-01-20 18:07:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:07:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:07:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:39,857 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=484, Invalid=1238, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 18:07:39,857 INFO L78 Accepts]: Start accepts. Automaton has 85003 states and 248327 transitions. Word has length 66 [2021-01-20 18:07:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:39,857 INFO L481 AbstractCegarLoop]: Abstraction has 85003 states and 248327 transitions. [2021-01-20 18:07:39,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 85003 states and 248327 transitions. [2021-01-20 18:07:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:07:39,931 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:39,931 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-01-20 18:07:40,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 18:07:40,145 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:40,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1252159651, now seen corresponding path program 31 times [2021-01-20 18:07:40,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:40,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847231859] [2021-01-20 18:07:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:40,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847231859] [2021-01-20 18:07:40,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302717104] [2021-01-20 18:07:40,310 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:07:40,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:40,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:40,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:40,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:07:40,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225388113] [2021-01-20 18:07:40,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:40,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:40,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:40,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:40,447 INFO L87 Difference]: Start difference. First operand 85003 states and 248327 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:42,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:42,106 INFO L93 Difference]: Finished difference Result 88267 states and 257927 transitions. [2021-01-20 18:07:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:07:42,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2021-01-20 18:07:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:42,108 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=1039, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 18:07:42,108 INFO L78 Accepts]: Start accepts. Automaton has 88267 states and 257927 transitions. Word has length 66 [2021-01-20 18:07:42,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:42,108 INFO L481 AbstractCegarLoop]: Abstraction has 88267 states and 257927 transitions. [2021-01-20 18:07:42,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 88267 states and 257927 transitions. [2021-01-20 18:07:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:07:42,183 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:42,183 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-01-20 18:07:42,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:42,399 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1249186421, now seen corresponding path program 32 times [2021-01-20 18:07:42,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:42,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341063994] [2021-01-20 18:07:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:42,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341063994] [2021-01-20 18:07:42,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924914166] [2021-01-20 18:07:42,576 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:42,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:07:42,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:42,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:07:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:42,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:42,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:42,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:42,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:07:42,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328662709] [2021-01-20 18:07:42,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:42,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:42,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:42,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:42,725 INFO L87 Difference]: Start difference. First operand 88267 states and 257927 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:44,128 INFO L93 Difference]: Finished difference Result 88331 states and 258055 transitions. [2021-01-20 18:07:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:07:44,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2021-01-20 18:07:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:44,130 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=1209, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 18:07:44,130 INFO L78 Accepts]: Start accepts. Automaton has 88331 states and 258055 transitions. Word has length 66 [2021-01-20 18:07:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:44,130 INFO L481 AbstractCegarLoop]: Abstraction has 88331 states and 258055 transitions. [2021-01-20 18:07:44,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 88331 states and 258055 transitions. [2021-01-20 18:07:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:07:44,742 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:44,742 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 18:07:44,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-20 18:07:44,944 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1334750316, now seen corresponding path program 33 times [2021-01-20 18:07:44,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:44,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973577746] [2021-01-20 18:07:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:45,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973577746] [2021-01-20 18:07:45,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511411228] [2021-01-20 18:07:45,167 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:45,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:07:45,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:07:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:45,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:45,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:45,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:07:45,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349841051] [2021-01-20 18:07:45,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:45,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:45,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:45,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:45,293 INFO L87 Difference]: Start difference. First operand 88331 states and 258055 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:46,176 INFO L93 Difference]: Finished difference Result 90443 states and 264263 transitions. [2021-01-20 18:07:46,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:07:46,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-01-20 18:07:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:46,177 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 18:07:46,178 INFO L78 Accepts]: Start accepts. Automaton has 90443 states and 264263 transitions. Word has length 71 [2021-01-20 18:07:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:46,178 INFO L481 AbstractCegarLoop]: Abstraction has 90443 states and 264263 transitions. [2021-01-20 18:07:46,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:46,178 INFO L276 IsEmpty]: Start isEmpty. Operand 90443 states and 264263 transitions. [2021-01-20 18:07:46,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:07:46,276 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:46,276 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 18:07:46,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 18:07:46,477 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:46,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:46,478 INFO L82 PathProgramCache]: Analyzing trace with hash -99594946, now seen corresponding path program 34 times [2021-01-20 18:07:46,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:46,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449074194] [2021-01-20 18:07:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:46,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449074194] [2021-01-20 18:07:46,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789456450] [2021-01-20 18:07:46,718 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:46,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:07:46,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:46,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:07:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:46,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:46,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:46,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:46,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:07:46,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790225781] [2021-01-20 18:07:46,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:07:46,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:46,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:07:46,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:07:46,871 INFO L87 Difference]: Start difference. First operand 90443 states and 264263 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:48,408 INFO L93 Difference]: Finished difference Result 92427 states and 270087 transitions. [2021-01-20 18:07:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:07:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:07:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:48,409 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=1028, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:07:48,409 INFO L78 Accepts]: Start accepts. Automaton has 92427 states and 270087 transitions. Word has length 71 [2021-01-20 18:07:48,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:48,410 INFO L481 AbstractCegarLoop]: Abstraction has 92427 states and 270087 transitions. [2021-01-20 18:07:48,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:48,410 INFO L276 IsEmpty]: Start isEmpty. Operand 92427 states and 270087 transitions. [2021-01-20 18:07:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:07:48,525 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:48,525 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 18:07:48,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:48,726 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:48,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1726601048, now seen corresponding path program 35 times [2021-01-20 18:07:48,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:48,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458060830] [2021-01-20 18:07:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:48,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458060830] [2021-01-20 18:07:48,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664137580] [2021-01-20 18:07:48,989 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:49,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 18:07:49,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:49,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:07:49,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:49,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:49,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:49,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:07:49,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036914077] [2021-01-20 18:07:49,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:49,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:49,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:49,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:49,119 INFO L87 Difference]: Start difference. First operand 92427 states and 270087 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:50,800 INFO L93 Difference]: Finished difference Result 94411 states and 275911 transitions. [2021-01-20 18:07:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:07:50,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-01-20 18:07:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:50,802 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:07:50,802 INFO L78 Accepts]: Start accepts. Automaton has 94411 states and 275911 transitions. Word has length 71 [2021-01-20 18:07:50,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:50,802 INFO L481 AbstractCegarLoop]: Abstraction has 94411 states and 275911 transitions. [2021-01-20 18:07:50,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 94411 states and 275911 transitions. [2021-01-20 18:07:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:07:50,889 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:50,889 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 18:07:51,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-20 18:07:51,090 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash -406694360, now seen corresponding path program 36 times [2021-01-20 18:07:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:51,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889539648] [2021-01-20 18:07:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:51,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889539648] [2021-01-20 18:07:51,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969953950] [2021-01-20 18:07:51,323 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:51,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 18:07:51,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:51,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:07:51,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:51,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:51,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:51,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:51,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:07:51,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450641525] [2021-01-20 18:07:51,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:07:51,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:51,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:07:51,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:07:51,479 INFO L87 Difference]: Start difference. First operand 94411 states and 275911 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:52,715 INFO L93 Difference]: Finished difference Result 97867 states and 286023 transitions. [2021-01-20 18:07:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 18:07:52,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:07:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:52,716 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:07:52,717 INFO L78 Accepts]: Start accepts. Automaton has 97867 states and 286023 transitions. Word has length 71 [2021-01-20 18:07:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:52,717 INFO L481 AbstractCegarLoop]: Abstraction has 97867 states and 286023 transitions. [2021-01-20 18:07:52,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 97867 states and 286023 transitions. [2021-01-20 18:07:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:07:52,818 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:52,819 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 18:07:53,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:53,020 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:53,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1483906518, now seen corresponding path program 37 times [2021-01-20 18:07:53,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:53,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16793156] [2021-01-20 18:07:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:53,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16793156] [2021-01-20 18:07:53,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122532875] [2021-01-20 18:07:53,810 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:53,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:07:53,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:53,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:53,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:53,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:07:53,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146358718] [2021-01-20 18:07:53,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:53,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:53,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:53,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:53,920 INFO L87 Difference]: Start difference. First operand 97867 states and 286023 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:55,079 INFO L93 Difference]: Finished difference Result 99851 states and 291847 transitions. [2021-01-20 18:07:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:07:55,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-01-20 18:07:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:55,081 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=458, Invalid=1182, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:07:55,081 INFO L78 Accepts]: Start accepts. Automaton has 99851 states and 291847 transitions. Word has length 71 [2021-01-20 18:07:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:55,081 INFO L481 AbstractCegarLoop]: Abstraction has 99851 states and 291847 transitions. [2021-01-20 18:07:55,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 99851 states and 291847 transitions. [2021-01-20 18:07:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:07:55,186 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:55,186 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 18:07:55,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-20 18:07:55,387 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:55,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1589354330, now seen corresponding path program 38 times [2021-01-20 18:07:55,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:55,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900077481] [2021-01-20 18:07:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:55,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900077481] [2021-01-20 18:07:55,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694664511] [2021-01-20 18:07:55,599 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:55,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:07:55,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:55,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:07:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:55,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:55,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:55,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:55,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:07:55,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911232760] [2021-01-20 18:07:55,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:07:55,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:55,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:07:55,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:07:55,738 INFO L87 Difference]: Start difference. First operand 99851 states and 291847 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:56,825 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-01-20 18:07:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:57,564 INFO L93 Difference]: Finished difference Result 101451 states and 296519 transitions. [2021-01-20 18:07:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 18:07:57,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:07:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:57,566 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=488, Invalid=1318, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 18:07:57,566 INFO L78 Accepts]: Start accepts. Automaton has 101451 states and 296519 transitions. Word has length 71 [2021-01-20 18:07:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:57,566 INFO L481 AbstractCegarLoop]: Abstraction has 101451 states and 296519 transitions. [2021-01-20 18:07:57,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 101451 states and 296519 transitions. [2021-01-20 18:07:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:07:57,670 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:57,670 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 18:07:57,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:57,871 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:57,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:57,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1615579604, now seen corresponding path program 39 times [2021-01-20 18:07:57,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:57,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109248676] [2021-01-20 18:07:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:58,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109248676] [2021-01-20 18:07:58,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264526220] [2021-01-20 18:07:58,064 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:58,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:07:58,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:07:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:58,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:07:58,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:58,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:07:58,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885203056] [2021-01-20 18:07:58,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:07:58,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:58,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:07:58,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:58,183 INFO L87 Difference]: Start difference. First operand 101451 states and 296519 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:59,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:59,970 INFO L93 Difference]: Finished difference Result 103307 states and 301959 transitions. [2021-01-20 18:07:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:07:59,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-01-20 18:07:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:59,972 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 18:07:59,972 INFO L78 Accepts]: Start accepts. Automaton has 103307 states and 301959 transitions. Word has length 71 [2021-01-20 18:07:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:59,972 INFO L481 AbstractCegarLoop]: Abstraction has 103307 states and 301959 transitions. [2021-01-20 18:07:59,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:07:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 103307 states and 301959 transitions. [2021-01-20 18:08:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:00,099 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:00,099 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 18:08:00,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 18:08:00,300 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1759784796, now seen corresponding path program 40 times [2021-01-20 18:08:00,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:00,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264268751] [2021-01-20 18:08:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:00,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264268751] [2021-01-20 18:08:00,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251093847] [2021-01-20 18:08:00,554 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:00,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:08:00,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:00,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:08:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:00,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:00,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:00,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:00,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:08:00,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359947509] [2021-01-20 18:08:00,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:00,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:00,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:00,733 INFO L87 Difference]: Start difference. First operand 103307 states and 301959 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:02,494 INFO L93 Difference]: Finished difference Result 105419 states and 308103 transitions. [2021-01-20 18:08:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 18:08:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:08:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:02,496 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=550, Invalid=1430, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:08:02,497 INFO L78 Accepts]: Start accepts. Automaton has 105419 states and 308103 transitions. Word has length 71 [2021-01-20 18:08:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:02,497 INFO L481 AbstractCegarLoop]: Abstraction has 105419 states and 308103 transitions. [2021-01-20 18:08:02,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 105419 states and 308103 transitions. [2021-01-20 18:08:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:03,199 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:03,202 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 18:08:03,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 18:08:03,404 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:03,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1407708878, now seen corresponding path program 41 times [2021-01-20 18:08:03,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:03,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115256444] [2021-01-20 18:08:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:03,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115256444] [2021-01-20 18:08:03,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851131219] [2021-01-20 18:08:03,590 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:03,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 18:08:03,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:03,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:03,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:03,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:03,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:03,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:08:03,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038715942] [2021-01-20 18:08:03,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:08:03,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:03,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:08:03,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:03,708 INFO L87 Difference]: Start difference. First operand 105419 states and 308103 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:05,112 INFO L93 Difference]: Finished difference Result 108555 states and 317319 transitions. [2021-01-20 18:08:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:08:05,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-01-20 18:08:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:05,114 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=602, Invalid=1378, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:08:05,114 INFO L78 Accepts]: Start accepts. Automaton has 108555 states and 317319 transitions. Word has length 71 [2021-01-20 18:08:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:05,114 INFO L481 AbstractCegarLoop]: Abstraction has 108555 states and 317319 transitions. [2021-01-20 18:08:05,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand 108555 states and 317319 transitions. [2021-01-20 18:08:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:05,212 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:05,212 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-01-20 18:08:05,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:05,413 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:05,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:05,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1410682108, now seen corresponding path program 42 times [2021-01-20 18:08:05,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:05,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143913769] [2021-01-20 18:08:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:05,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143913769] [2021-01-20 18:08:05,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331620758] [2021-01-20 18:08:05,606 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:05,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 18:08:05,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:05,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:05,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:05,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:05,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:05,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:08:05,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155687508] [2021-01-20 18:08:05,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:05,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:05,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:05,736 INFO L87 Difference]: Start difference. First operand 108555 states and 317319 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:06,436 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-01-20 18:08:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:07,918 INFO L93 Difference]: Finished difference Result 108811 states and 318023 transitions. [2021-01-20 18:08:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 18:08:07,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:08:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:07,922 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 18:08:07,922 INFO L78 Accepts]: Start accepts. Automaton has 108811 states and 318023 transitions. Word has length 71 [2021-01-20 18:08:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:07,923 INFO L481 AbstractCegarLoop]: Abstraction has 108811 states and 318023 transitions. [2021-01-20 18:08:07,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 108811 states and 318023 transitions. [2021-01-20 18:08:08,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:08:08,043 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:08,043 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:08,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-20 18:08:08,244 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:08,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1682215820, now seen corresponding path program 43 times [2021-01-20 18:08:08,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:08,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878959489] [2021-01-20 18:08:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:08,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878959489] [2021-01-20 18:08:08,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445420605] [2021-01-20 18:08:08,499 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:08,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:08:08,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:08,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:08,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:08,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-20 18:08:08,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531043740] [2021-01-20 18:08:08,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:08,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:08,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:08,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:08,613 INFO L87 Difference]: Start difference. First operand 108811 states and 318023 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:10,223 INFO L93 Difference]: Finished difference Result 111435 states and 325767 transitions. [2021-01-20 18:08:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 18:08:10,224 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-01-20 18:08:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:10,224 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=998, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:08:10,224 INFO L78 Accepts]: Start accepts. Automaton has 111435 states and 325767 transitions. Word has length 76 [2021-01-20 18:08:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:10,224 INFO L481 AbstractCegarLoop]: Abstraction has 111435 states and 325767 transitions. [2021-01-20 18:08:10,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 111435 states and 325767 transitions. [2021-01-20 18:08:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:08:10,350 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:10,350 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:10,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:10,556 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:10,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash 247870558, now seen corresponding path program 44 times [2021-01-20 18:08:10,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:10,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32955272] [2021-01-20 18:08:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:10,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32955272] [2021-01-20 18:08:10,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912426713] [2021-01-20 18:08:10,824 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:10,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:08:10,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:10,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:08:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:10,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:10,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:10,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:10,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:08:10,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429381862] [2021-01-20 18:08:10,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:08:10,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:10,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:08:10,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:08:10,964 INFO L87 Difference]: Start difference. First operand 111435 states and 325767 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:12,871 INFO L93 Difference]: Finished difference Result 113419 states and 331591 transitions. [2021-01-20 18:08:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:08:12,872 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:08:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:12,872 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 18:08:12,872 INFO L78 Accepts]: Start accepts. Automaton has 113419 states and 331591 transitions. Word has length 76 [2021-01-20 18:08:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:12,872 INFO L481 AbstractCegarLoop]: Abstraction has 113419 states and 331591 transitions. [2021-01-20 18:08:12,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 113419 states and 331591 transitions. [2021-01-20 18:08:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:08:13,018 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:13,019 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:13,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:13,220 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2074066552, now seen corresponding path program 45 times [2021-01-20 18:08:13,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:13,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129371446] [2021-01-20 18:08:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:13,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129371446] [2021-01-20 18:08:13,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405735169] [2021-01-20 18:08:13,489 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:13,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:08:13,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:08:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:13,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:13,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:13,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-20 18:08:13,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758733095] [2021-01-20 18:08:13,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:13,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:13,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:13,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:13,619 INFO L87 Difference]: Start difference. First operand 113419 states and 331591 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:15,084 INFO L93 Difference]: Finished difference Result 115531 states and 337799 transitions. [2021-01-20 18:08:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:08:15,085 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-01-20 18:08:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:15,086 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=431, Invalid=1129, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 18:08:15,086 INFO L78 Accepts]: Start accepts. Automaton has 115531 states and 337799 transitions. Word has length 76 [2021-01-20 18:08:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:15,087 INFO L481 AbstractCegarLoop]: Abstraction has 115531 states and 337799 transitions. [2021-01-20 18:08:15,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 115531 states and 337799 transitions. [2021-01-20 18:08:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:08:15,233 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:15,233 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:15,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-20 18:08:15,434 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash -59228856, now seen corresponding path program 46 times [2021-01-20 18:08:15,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:15,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741519484] [2021-01-20 18:08:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:16,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741519484] [2021-01-20 18:08:16,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119692381] [2021-01-20 18:08:16,325 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:16,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:08:16,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:08:16,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:16,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:16,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:16,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:16,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:08:16,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136943293] [2021-01-20 18:08:16,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:08:16,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:16,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:08:16,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:08:16,489 INFO L87 Difference]: Start difference. First operand 115531 states and 337799 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:17,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:17,977 INFO L93 Difference]: Finished difference Result 117259 states and 342855 transitions. [2021-01-20 18:08:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:08:17,978 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:08:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:17,978 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=534, Invalid=1446, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:08:17,979 INFO L78 Accepts]: Start accepts. Automaton has 117259 states and 342855 transitions. Word has length 76 [2021-01-20 18:08:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:17,979 INFO L481 AbstractCegarLoop]: Abstraction has 117259 states and 342855 transitions. [2021-01-20 18:08:17,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 117259 states and 342855 transitions. [2021-01-20 18:08:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:08:18,100 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:18,100 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:18,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:18,301 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:18,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:18,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1831372022, now seen corresponding path program 47 times [2021-01-20 18:08:18,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:18,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485372412] [2021-01-20 18:08:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:18,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485372412] [2021-01-20 18:08:18,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202597492] [2021-01-20 18:08:18,522 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:18,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:08:18,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:18,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:08:18,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:18,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:18,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:18,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-20 18:08:18,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287201643] [2021-01-20 18:08:18,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:18,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:18,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:18,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:18,644 INFO L87 Difference]: Start difference. First operand 117259 states and 342855 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:20,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:20,526 INFO L93 Difference]: Finished difference Result 119115 states and 348295 transitions. [2021-01-20 18:08:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:08:20,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-01-20 18:08:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:20,527 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=474, Invalid=1248, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 18:08:20,527 INFO L78 Accepts]: Start accepts. Automaton has 119115 states and 348295 transitions. Word has length 76 [2021-01-20 18:08:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:20,528 INFO L481 AbstractCegarLoop]: Abstraction has 119115 states and 348295 transitions. [2021-01-20 18:08:20,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 119115 states and 348295 transitions. [2021-01-20 18:08:20,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:08:20,642 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:20,642 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:20,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-20 18:08:20,843 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:20,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1241888826, now seen corresponding path program 48 times [2021-01-20 18:08:20,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:20,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058640118] [2021-01-20 18:08:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:21,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058640118] [2021-01-20 18:08:21,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936639691] [2021-01-20 18:08:21,069 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:21,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:08:21,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:21,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:08:21,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:21,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:21,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:21,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:21,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:08:21,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437222103] [2021-01-20 18:08:21,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:08:21,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:21,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:08:21,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:08:21,298 INFO L87 Difference]: Start difference. First operand 119115 states and 348295 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:23,173 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-01-20 18:08:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:23,725 INFO L93 Difference]: Finished difference Result 120843 states and 353351 transitions. [2021-01-20 18:08:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:08:23,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:08:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:23,727 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=585, Invalid=1577, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 18:08:23,727 INFO L78 Accepts]: Start accepts. Automaton has 120843 states and 353351 transitions. Word has length 76 [2021-01-20 18:08:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:23,727 INFO L481 AbstractCegarLoop]: Abstraction has 120843 states and 353351 transitions. [2021-01-20 18:08:23,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 120843 states and 353351 transitions. [2021-01-20 18:08:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:08:23,841 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:23,841 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:24,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-20 18:08:24,042 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1963045108, now seen corresponding path program 49 times [2021-01-20 18:08:24,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:24,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468744585] [2021-01-20 18:08:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:24,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468744585] [2021-01-20 18:08:24,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613275730] [2021-01-20 18:08:24,266 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:24,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:08:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:24,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:24,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:24,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-20 18:08:24,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937250487] [2021-01-20 18:08:24,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:24,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:24,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:24,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:24,389 INFO L87 Difference]: Start difference. First operand 120843 states and 353351 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:26,499 INFO L93 Difference]: Finished difference Result 122699 states and 358791 transitions. [2021-01-20 18:08:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:08:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-01-20 18:08:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:26,501 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1355, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 18:08:26,501 INFO L78 Accepts]: Start accepts. Automaton has 122699 states and 358791 transitions. Word has length 76 [2021-01-20 18:08:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:26,501 INFO L481 AbstractCegarLoop]: Abstraction has 122699 states and 358791 transitions. [2021-01-20 18:08:26,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 122699 states and 358791 transitions. [2021-01-20 18:08:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:08:26,647 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:26,647 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:26,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-20 18:08:26,848 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1412319292, now seen corresponding path program 50 times [2021-01-20 18:08:26,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:26,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304795445] [2021-01-20 18:08:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:27,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304795445] [2021-01-20 18:08:27,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305094510] [2021-01-20 18:08:27,123 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:27,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:08:27,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:27,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:08:27,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:27,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:27,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:27,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:27,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:08:27,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553812204] [2021-01-20 18:08:27,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:08:27,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:08:27,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:08:27,302 INFO L87 Difference]: Start difference. First operand 122699 states and 358791 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:29,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:29,356 INFO L93 Difference]: Finished difference Result 124811 states and 364935 transitions. [2021-01-20 18:08:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:08:29,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:08:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:29,357 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 18:08:29,358 INFO L78 Accepts]: Start accepts. Automaton has 124811 states and 364935 transitions. Word has length 76 [2021-01-20 18:08:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:29,358 INFO L481 AbstractCegarLoop]: Abstraction has 124811 states and 364935 transitions. [2021-01-20 18:08:29,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 124811 states and 364935 transitions. [2021-01-20 18:08:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:08:30,097 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:30,097 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:30,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-20 18:08:30,313 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1060243374, now seen corresponding path program 51 times [2021-01-20 18:08:30,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:30,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032793183] [2021-01-20 18:08:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:30,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032793183] [2021-01-20 18:08:30,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030441226] [2021-01-20 18:08:30,518 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:30,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:08:30,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:30,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:08:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:30,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:30,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:30,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-20 18:08:30,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84861479] [2021-01-20 18:08:30,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:30,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:30,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:30,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:30,640 INFO L87 Difference]: Start difference. First operand 124811 states and 364935 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:32,213 INFO L93 Difference]: Finished difference Result 127947 states and 374151 transitions. [2021-01-20 18:08:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:08:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-01-20 18:08:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:32,215 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=620, Invalid=1450, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 18:08:32,215 INFO L78 Accepts]: Start accepts. Automaton has 127947 states and 374151 transitions. Word has length 76 [2021-01-20 18:08:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:32,215 INFO L481 AbstractCegarLoop]: Abstraction has 127947 states and 374151 transitions. [2021-01-20 18:08:32,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 127947 states and 374151 transitions. [2021-01-20 18:08:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:08:32,336 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:32,337 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:32,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:32,538 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:32,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1063216604, now seen corresponding path program 52 times [2021-01-20 18:08:32,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:32,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986523987] [2021-01-20 18:08:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:32,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986523987] [2021-01-20 18:08:32,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560689041] [2021-01-20 18:08:32,751 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:32,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:08:32,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:08:32,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:33,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:33,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:33,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:33,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:08:33,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495048655] [2021-01-20 18:08:33,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:08:33,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:33,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:08:33,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:08:33,891 INFO L87 Difference]: Start difference. First operand 127947 states and 374151 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:35,767 INFO L93 Difference]: Finished difference Result 128587 states and 375943 transitions. [2021-01-20 18:08:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 18:08:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:08:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:35,769 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=698, Invalid=1654, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 18:08:35,769 INFO L78 Accepts]: Start accepts. Automaton has 128587 states and 375943 transitions. Word has length 76 [2021-01-20 18:08:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:35,769 INFO L481 AbstractCegarLoop]: Abstraction has 128587 states and 375943 transitions. [2021-01-20 18:08:35,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 128587 states and 375943 transitions. [2021-01-20 18:08:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:08:35,927 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:35,927 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:36,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:36,129 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:36,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2102535418, now seen corresponding path program 53 times [2021-01-20 18:08:36,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:36,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452021799] [2021-01-20 18:08:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:08:36,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452021799] [2021-01-20 18:08:36,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269126459] [2021-01-20 18:08:36,293 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:36,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-20 18:08:36,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:36,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:08:36,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:08:36,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-20 18:08:36,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-01-20 18:08:36,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990642806] [2021-01-20 18:08:36,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:08:36,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:36,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:08:36,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:36,445 INFO L87 Difference]: Start difference. First operand 128587 states and 375943 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:38,152 INFO L93 Difference]: Finished difference Result 205678 states and 606982 transitions. [2021-01-20 18:08:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:08:38,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 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 81 [2021-01-20 18:08:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:38,153 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-01-20 18:08:38,153 INFO L78 Accepts]: Start accepts. Automaton has 205678 states and 606982 transitions. Word has length 81 [2021-01-20 18:08:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:38,154 INFO L481 AbstractCegarLoop]: Abstraction has 205678 states and 606982 transitions. [2021-01-20 18:08:38,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 205678 states and 606982 transitions. [2021-01-20 18:08:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:08:38,516 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:38,516 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:38,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:38,724 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:38,725 INFO L82 PathProgramCache]: Analyzing trace with hash -298810531, now seen corresponding path program 54 times [2021-01-20 18:08:38,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:38,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587322873] [2021-01-20 18:08:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:38,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587322873] [2021-01-20 18:08:38,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480938241] [2021-01-20 18:08:38,880 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:38,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:08:38,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:38,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:08:38,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:39,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-20 18:08:39,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-01-20 18:08:39,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501187586] [2021-01-20 18:08:39,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:08:39,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:39,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:08:39,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:39,014 INFO L87 Difference]: Start difference. First operand 205678 states and 606982 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:43,272 INFO L93 Difference]: Finished difference Result 424333 states and 1285236 transitions. [2021-01-20 18:08:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:08:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-01-20 18:08:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:43,275 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-01-20 18:08:43,276 INFO L78 Accepts]: Start accepts. Automaton has 424333 states and 1285236 transitions. Word has length 81 [2021-01-20 18:08:43,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:43,276 INFO L481 AbstractCegarLoop]: Abstraction has 424333 states and 1285236 transitions. [2021-01-20 18:08:43,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:43,276 INFO L276 IsEmpty]: Start isEmpty. Operand 424333 states and 1285236 transitions. [2021-01-20 18:08:44,126 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-20 18:08:44,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-20 18:08:44,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 06:08:44 BasicIcfg [2021-01-20 18:08:44,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-20 18:08:44,337 INFO L168 Benchmark]: Toolchain (without parser) took 125837.14 ms. Allocated memory was 302.0 MB in the beginning and 14.4 GB in the end (delta: 14.1 GB). Free memory was 276.8 MB in the beginning and 9.1 GB in the end (delta: -8.9 GB). Peak memory consumption was 5.5 GB. Max. memory is 16.0 GB. [2021-01-20 18:08:44,337 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 302.0 MB. Free memory is still 272.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-01-20 18:08:44,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 906.35 ms. Allocated memory is still 302.0 MB. Free memory was 276.6 MB in the beginning and 247.9 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2021-01-20 18:08:44,338 INFO L168 Benchmark]: Boogie Procedure Inliner took 95.31 ms. Allocated memory is still 302.0 MB. Free memory was 247.7 MB in the beginning and 246.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 18:08:44,338 INFO L168 Benchmark]: Boogie Preprocessor took 36.08 ms. Allocated memory is still 302.0 MB. Free memory was 246.0 MB in the beginning and 244.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-20 18:08:44,339 INFO L168 Benchmark]: RCFGBuilder took 711.21 ms. Allocated memory is still 302.0 MB. Free memory was 244.5 MB in the beginning and 265.3 MB in the end (delta: -20.8 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.0 GB. [2021-01-20 18:08:44,339 INFO L168 Benchmark]: TraceAbstraction took 124072.88 ms. Allocated memory was 302.0 MB in the beginning and 14.4 GB in the end (delta: 14.1 GB). Free memory was 265.3 MB in the beginning and 9.1 GB in the end (delta: -8.9 GB). Peak memory consumption was 5.5 GB. Max. memory is 16.0 GB. [2021-01-20 18:08:44,341 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 302.0 MB. Free memory is still 272.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 906.35 ms. Allocated memory is still 302.0 MB. Free memory was 276.6 MB in the beginning and 247.9 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 95.31 ms. Allocated memory is still 302.0 MB. Free memory was 247.7 MB in the beginning and 246.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 36.08 ms. Allocated memory is still 302.0 MB. Free memory was 246.0 MB in the beginning and 244.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 711.21 ms. Allocated memory is still 302.0 MB. Free memory was 244.5 MB in the beginning and 265.3 MB in the end (delta: -20.8 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 124072.88 ms. Allocated memory was 302.0 MB in the beginning and 14.4 GB in the end (delta: 14.1 GB). Free memory was 265.3 MB in the beginning and 9.1 GB in the end (delta: -8.9 GB). Peak memory consumption was 5.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 693]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 123.9s, OverallIterations: 64, TraceHistogramMax: 6, AutomataDifference: 77.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 8401 SDtfs, 58220 SDslu, 48000 SDs, 0 SdLazy, 8406 SolverSat, 3303 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5631 GetRequests, 3605 SyntacticMatches, 53 SemanticMatches, 1973 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18024 ImplicationChecksByTransitivity, 46.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=424333occurred in iteration=64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 17.0s InterpolantComputationTime, 7472 NumberOfCodeBlocks, 7472 NumberOfCodeBlocksAsserted, 241 NumberOfCheckSat, 7350 ConstructedInterpolants, 0 QuantifiedInterpolants, 1672464 SizeOfPredicates, 603 NumberOfNonLiveVariables, 8512 ConjunctsInSsa, 782 ConjunctsInUnsatCore, 122 InterpolantComputations, 8 PerfectInterpolantSequences, 358/4640 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 proved your program to be correct! Received shutdown request...