/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-aa1e80b [2020-12-17 20:41:27,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-17 20:41:27,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-17 20:41:27,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-17 20:41:27,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-17 20:41:27,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-17 20:41:27,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-17 20:41:27,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-17 20:41:27,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-17 20:41:27,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-17 20:41:27,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-17 20:41:27,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-17 20:41:27,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-17 20:41:27,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-17 20:41:27,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-17 20:41:27,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-17 20:41:27,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-17 20:41:27,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-17 20:41:27,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-17 20:41:27,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-17 20:41:27,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-17 20:41:27,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-17 20:41:27,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-17 20:41:27,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-17 20:41:27,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-17 20:41:27,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-17 20:41:27,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-17 20:41:27,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-17 20:41:27,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-17 20:41:27,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-17 20:41:27,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-17 20:41:27,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-17 20:41:27,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-17 20:41:27,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-17 20:41:27,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-17 20:41:27,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-17 20:41:27,756 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 [2020-12-17 20:41:27,783 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-17 20:41:27,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-17 20:41:27,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-17 20:41:27,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-17 20:41:27,785 INFO L138 SettingsManager]: * Use SBE=true [2020-12-17 20:41:27,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-17 20:41:27,786 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-17 20:41:27,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-17 20:41:27,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-17 20:41:27,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-17 20:41:27,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-17 20:41:27,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-17 20:41:27,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-17 20:41:27,787 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-17 20:41:27,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-17 20:41:27,788 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-17 20:41:27,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-17 20:41:27,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-17 20:41:27,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-17 20:41:27,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-17 20:41:27,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-17 20:41:27,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-17 20:41:27,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-17 20:41:27,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-17 20:41:27,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-17 20:41:27,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-17 20:41:27,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-17 20:41:27,790 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-12-17 20:41:27,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-17 20:41:27,791 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2020-12-17 20:41:27,791 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2020-12-17 20:41:27,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-17 20:41:28,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-17 20:41:28,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-17 20:41:28,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-17 20:41:28,200 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-17 20:41:28,201 INFO L275 PluginConnector]: CDTParser initialized [2020-12-17 20:41:28,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-12-17 20:41:28,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0f4adfc/375bdac8346446e8847a8856244986cd/FLAGe72996cb5 [2020-12-17 20:41:29,299 INFO L306 CDTParser]: Found 1 translation units. [2020-12-17 20:41:29,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-12-17 20:41:29,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0f4adfc/375bdac8346446e8847a8856244986cd/FLAGe72996cb5 [2020-12-17 20:41:29,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0f4adfc/375bdac8346446e8847a8856244986cd [2020-12-17 20:41:29,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-17 20:41:29,552 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-12-17 20:41:29,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-17 20:41:29,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-17 20:41:29,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-17 20:41:29,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:41:29" (1/1) ... [2020-12-17 20:41:29,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a444ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:29, skipping insertion in model container [2020-12-17 20:41:29,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:41:29" (1/1) ... [2020-12-17 20:41:29,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-17 20:41:29,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-17 20:41:30,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-17 20:41:30,179 INFO L203 MainTranslator]: Completed pre-run [2020-12-17 20:41:30,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-17 20:41:30,378 INFO L208 MainTranslator]: Completed translation [2020-12-17 20:41:30,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30 WrapperNode [2020-12-17 20:41:30,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-17 20:41:30,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-17 20:41:30,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-17 20:41:30,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-17 20:41:30,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (1/1) ... [2020-12-17 20:41:30,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (1/1) ... [2020-12-17 20:41:30,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-17 20:41:30,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-17 20:41:30,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-17 20:41:30,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-17 20:41:30,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (1/1) ... [2020-12-17 20:41:30,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (1/1) ... [2020-12-17 20:41:30,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (1/1) ... [2020-12-17 20:41:30,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (1/1) ... [2020-12-17 20:41:30,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (1/1) ... [2020-12-17 20:41:30,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (1/1) ... [2020-12-17 20:41:30,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (1/1) ... [2020-12-17 20:41:30,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-17 20:41:30,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-17 20:41:30,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-17 20:41:30,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-17 20:41:30,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (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 [2020-12-17 20:41:30,610 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-17 20:41:30,611 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-17 20:41:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-17 20:41:30,613 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-17 20:41:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-17 20:41:30,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-17 20:41:30,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-17 20:41:30,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-17 20:41:30,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-17 20:41:30,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-17 20:41:30,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-17 20:41:30,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-17 20:41:30,619 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-17 20:41:31,055 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-17 20:41:31,056 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-17 20:41:31,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:41:31 BoogieIcfgContainer [2020-12-17 20:41:31,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-17 20:41:31,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-17 20:41:31,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-17 20:41:31,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-17 20:41:31,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:41:29" (1/3) ... [2020-12-17 20:41:31,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507d7632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:41:31, skipping insertion in model container [2020-12-17 20:41:31,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:41:30" (2/3) ... [2020-12-17 20:41:31,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507d7632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:41:31, skipping insertion in model container [2020-12-17 20:41:31,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:41:31" (3/3) ... [2020-12-17 20:41:31,071 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-12-17 20:41:31,094 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-17 20:41:31,094 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-17 20:41:31,100 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-17 20:41:31,102 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-17 20:41:31,141 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,142 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,142 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,142 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,143 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,143 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,146 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,146 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,146 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,147 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,147 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,148 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,149 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,149 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,149 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,150 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,150 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,150 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,151 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,151 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,151 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,153 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,153 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,153 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,154 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,154 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,154 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,155 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,155 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,155 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,156 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,156 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,156 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,157 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,157 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,157 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,157 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,158 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,158 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,158 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,159 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,159 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,160 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,160 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,160 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,161 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,161 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,161 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,164 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,165 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,166 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,176 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,176 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,176 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,177 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,177 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,177 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:41:31,180 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-17 20:41:31,199 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-17 20:41:31,234 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-17 20:41:31,235 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-17 20:41:31,235 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-17 20:41:31,235 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-17 20:41:31,235 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-17 20:41:31,236 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-17 20:41:31,236 INFO L383 AbstractCegarLoop]: Minimize is NONE [2020-12-17 20:41:31,236 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-17 20:41:31,257 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2020-12-17 20:41:31,492 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) [2020-12-17 20:41:31,506 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) [2020-12-17 20:41:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-17 20:41:31,527 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:31,528 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] [2020-12-17 20:41:31,529 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:31,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1900887756, now seen corresponding path program 1 times [2020-12-17 20:41:31,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:31,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933977613] [2020-12-17 20:41:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:32,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933977613] [2020-12-17 20:41:32,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:41:32,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:41:32,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384830832] [2020-12-17 20:41:32,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:41:32,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:32,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:41:32,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:41:32,154 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) [2020-12-17 20:41:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:32,430 INFO L93 Difference]: Finished difference Result 3507 states and 10199 transitions. [2020-12-17 20:41:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-17 20:41:32,433 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 [2020-12-17 20:41:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:32,437 INFO L763 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 [2020-12-17 20:41:32,437 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 10199 transitions. Word has length 28 [2020-12-17 20:41:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:32,439 INFO L481 AbstractCegarLoop]: Abstraction has 3507 states and 10199 transitions. [2020-12-17 20:41:32,439 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) [2020-12-17 20:41:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 10199 transitions. [2020-12-17 20:41:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-17 20:41:32,451 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:32,451 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] [2020-12-17 20:41:32,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-17 20:41:32,452 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:32,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1614586761, now seen corresponding path program 1 times [2020-12-17 20:41:32,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:32,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762267020] [2020-12-17 20:41:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:32,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762267020] [2020-12-17 20:41:32,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:41:32,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:41:32,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297007999] [2020-12-17 20:41:32,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:41:32,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:32,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:41:32,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:41:32,687 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) [2020-12-17 20:41:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:32,897 INFO L93 Difference]: Finished difference Result 3987 states and 11599 transitions. [2020-12-17 20:41:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-17 20:41:32,898 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 [2020-12-17 20:41:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:32,900 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:41:32,900 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 11599 transitions. Word has length 32 [2020-12-17 20:41:32,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:32,901 INFO L481 AbstractCegarLoop]: Abstraction has 3987 states and 11599 transitions. [2020-12-17 20:41:32,901 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) [2020-12-17 20:41:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 11599 transitions. [2020-12-17 20:41:32,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-17 20:41:32,906 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:32,906 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] [2020-12-17 20:41:32,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-17 20:41:32,906 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:32,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1199752031, now seen corresponding path program 1 times [2020-12-17 20:41:32,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:32,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021238758] [2020-12-17 20:41:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:33,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021238758] [2020-12-17 20:41:33,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:41:33,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:41:33,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429096265] [2020-12-17 20:41:33,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:41:33,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:33,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:41:33,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:41:33,071 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) [2020-12-17 20:41:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:33,271 INFO L93 Difference]: Finished difference Result 5915 states and 17263 transitions. [2020-12-17 20:41:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-17 20:41:33,272 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 [2020-12-17 20:41:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:33,273 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:41:33,273 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 17263 transitions. Word has length 32 [2020-12-17 20:41:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:33,275 INFO L481 AbstractCegarLoop]: Abstraction has 5915 states and 17263 transitions. [2020-12-17 20:41:33,275 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) [2020-12-17 20:41:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 17263 transitions. [2020-12-17 20:41:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-17 20:41:33,280 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:33,280 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] [2020-12-17 20:41:33,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-17 20:41:33,281 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1202725261, now seen corresponding path program 2 times [2020-12-17 20:41:33,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:33,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505624314] [2020-12-17 20:41:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:33,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505624314] [2020-12-17 20:41:33,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:41:33,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:41:33,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122806309] [2020-12-17 20:41:33,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:41:33,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:33,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:41:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:41:33,478 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) [2020-12-17 20:41:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:33,679 INFO L93 Difference]: Finished difference Result 5915 states and 17199 transitions. [2020-12-17 20:41:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-17 20:41:33,680 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 [2020-12-17 20:41:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:33,681 INFO L763 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 [2020-12-17 20:41:33,681 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 17199 transitions. Word has length 32 [2020-12-17 20:41:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:33,682 INFO L481 AbstractCegarLoop]: Abstraction has 5915 states and 17199 transitions. [2020-12-17 20:41:33,684 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) [2020-12-17 20:41:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 17199 transitions. [2020-12-17 20:41:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-17 20:41:33,694 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:33,694 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] [2020-12-17 20:41:33,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-17 20:41:33,694 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1299742308, now seen corresponding path program 1 times [2020-12-17 20:41:33,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:33,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723097797] [2020-12-17 20:41:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723097797] [2020-12-17 20:41:33,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:41:33,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:41:33,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300146734] [2020-12-17 20:41:33,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:41:33,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:41:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:41:33,868 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) [2020-12-17 20:41:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:34,256 INFO L93 Difference]: Finished difference Result 9179 states and 26799 transitions. [2020-12-17 20:41:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-17 20:41:34,257 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 [2020-12-17 20:41:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:34,263 INFO L763 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 [2020-12-17 20:41:34,264 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 26799 transitions. Word has length 36 [2020-12-17 20:41:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:34,264 INFO L481 AbstractCegarLoop]: Abstraction has 9179 states and 26799 transitions. [2020-12-17 20:41:34,264 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) [2020-12-17 20:41:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 26799 transitions. [2020-12-17 20:41:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-17 20:41:34,271 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:34,271 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:41:34,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-17 20:41:34,272 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:34,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1296769078, now seen corresponding path program 2 times [2020-12-17 20:41:34,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:34,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574094138] [2020-12-17 20:41:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:34,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574094138] [2020-12-17 20:41:34,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:41:34,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:41:34,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556219171] [2020-12-17 20:41:34,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:41:34,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:34,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:41:34,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:41:34,415 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) [2020-12-17 20:41:34,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:34,773 INFO L93 Difference]: Finished difference Result 9243 states and 26927 transitions. [2020-12-17 20:41:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-17 20:41:34,774 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 [2020-12-17 20:41:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:34,775 INFO L763 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 [2020-12-17 20:41:34,776 INFO L78 Accepts]: Start accepts. Automaton has 9243 states and 26927 transitions. Word has length 36 [2020-12-17 20:41:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:34,776 INFO L481 AbstractCegarLoop]: Abstraction has 9243 states and 26927 transitions. [2020-12-17 20:41:34,776 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) [2020-12-17 20:41:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 9243 states and 26927 transitions. [2020-12-17 20:41:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-17 20:41:34,795 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:34,795 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] [2020-12-17 20:41:34,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-17 20:41:34,796 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1854918631, now seen corresponding path program 1 times [2020-12-17 20:41:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:34,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923415866] [2020-12-17 20:41:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:34,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923415866] [2020-12-17 20:41:34,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087211806] [2020-12-17 20:41:34,966 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 [2020-12-17 20:41:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:35,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-17 20:41:35,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:35,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:35,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:35,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-17 20:41:35,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871018752] [2020-12-17 20:41:35,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-17 20:41:35,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:35,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-17 20:41:35,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-17 20:41:35,306 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) [2020-12-17 20:41:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:35,684 INFO L93 Difference]: Finished difference Result 10971 states and 31983 transitions. [2020-12-17 20:41:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-17 20:41:35,685 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 [2020-12-17 20:41:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:35,688 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:41:35,689 INFO L78 Accepts]: Start accepts. Automaton has 10971 states and 31983 transitions. Word has length 41 [2020-12-17 20:41:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:35,689 INFO L481 AbstractCegarLoop]: Abstraction has 10971 states and 31983 transitions. [2020-12-17 20:41:35,690 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) [2020-12-17 20:41:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 10971 states and 31983 transitions. [2020-12-17 20:41:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-17 20:41:35,728 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:35,728 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] [2020-12-17 20:41:35,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-17 20:41:35,942 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash 467840107, now seen corresponding path program 2 times [2020-12-17 20:41:35,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:35,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300746827] [2020-12-17 20:41:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:36,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300746827] [2020-12-17 20:41:36,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117483999] [2020-12-17 20:41:36,299 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 [2020-12-17 20:41:36,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:41:36,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:36,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-17 20:41:36,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:36,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:41:36,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:36,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:36,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-17 20:41:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536351717] [2020-12-17 20:41:36,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:41:36,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:36,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:41:36,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:41:36,519 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) [2020-12-17 20:41:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:37,082 INFO L93 Difference]: Finished difference Result 14043 states and 40943 transitions. [2020-12-17 20:41:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-17 20:41:37,083 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 [2020-12-17 20:41:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:37,084 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:41:37,084 INFO L78 Accepts]: Start accepts. Automaton has 14043 states and 40943 transitions. Word has length 41 [2020-12-17 20:41:37,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:37,085 INFO L481 AbstractCegarLoop]: Abstraction has 14043 states and 40943 transitions. [2020-12-17 20:41:37,085 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) [2020-12-17 20:41:37,085 INFO L276 IsEmpty]: Start isEmpty. Operand 14043 states and 40943 transitions. [2020-12-17 20:41:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-17 20:41:37,102 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:37,102 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] [2020-12-17 20:41:37,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:41:37,317 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:37,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1873860069, now seen corresponding path program 3 times [2020-12-17 20:41:37,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:37,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469027419] [2020-12-17 20:41:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:37,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469027419] [2020-12-17 20:41:37,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549853747] [2020-12-17 20:41:37,535 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 [2020-12-17 20:41:37,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-17 20:41:37,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:37,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-17 20:41:37,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:37,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:37,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:37,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-17 20:41:37,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140761905] [2020-12-17 20:41:37,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-17 20:41:37,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:37,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-17 20:41:37,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-17 20:41:37,681 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) [2020-12-17 20:41:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:38,171 INFO L93 Difference]: Finished difference Result 17179 states and 50159 transitions. [2020-12-17 20:41:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-17 20:41:38,172 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 [2020-12-17 20:41:38,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:38,173 INFO L763 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 [2020-12-17 20:41:38,174 INFO L78 Accepts]: Start accepts. Automaton has 17179 states and 50159 transitions. Word has length 41 [2020-12-17 20:41:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:38,174 INFO L481 AbstractCegarLoop]: Abstraction has 17179 states and 50159 transitions. [2020-12-17 20:41:38,175 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) [2020-12-17 20:41:38,175 INFO L276 IsEmpty]: Start isEmpty. Operand 17179 states and 50159 transitions. [2020-12-17 20:41:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-17 20:41:38,191 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:38,192 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] [2020-12-17 20:41:38,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:41:38,407 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1870886839, now seen corresponding path program 4 times [2020-12-17 20:41:38,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:38,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697259360] [2020-12-17 20:41:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:38,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697259360] [2020-12-17 20:41:38,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785616714] [2020-12-17 20:41:38,609 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 [2020-12-17 20:41:38,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:41:38,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:38,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:41:38,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:38,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:41:38,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:38,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:38,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-17 20:41:38,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960331437] [2020-12-17 20:41:38,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:41:38,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:38,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:41:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:41:38,914 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) [2020-12-17 20:41:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:39,653 INFO L93 Difference]: Finished difference Result 18523 states and 53999 transitions. [2020-12-17 20:41:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-17 20:41:39,654 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 [2020-12-17 20:41:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:39,655 INFO L763 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 [2020-12-17 20:41:39,655 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 53999 transitions. Word has length 41 [2020-12-17 20:41:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:39,655 INFO L481 AbstractCegarLoop]: Abstraction has 18523 states and 53999 transitions. [2020-12-17 20:41:39,655 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) [2020-12-17 20:41:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 53999 transitions. [2020-12-17 20:41:39,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:41:39,670 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:39,671 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] [2020-12-17 20:41:39,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:41:39,872 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:39,874 INFO L82 PathProgramCache]: Analyzing trace with hash 697126713, now seen corresponding path program 1 times [2020-12-17 20:41:39,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:39,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691058183] [2020-12-17 20:41:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:40,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691058183] [2020-12-17 20:41:40,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372471511] [2020-12-17 20:41:40,053 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 [2020-12-17 20:41:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:40,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:41:40,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:40,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:40,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:40,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-17 20:41:40,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336583412] [2020-12-17 20:41:40,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:41:40,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:40,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:41:40,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:41:40,170 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) [2020-12-17 20:41:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:40,579 INFO L93 Difference]: Finished difference Result 20379 states and 59439 transitions. [2020-12-17 20:41:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-17 20:41:40,580 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 [2020-12-17 20:41:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:40,581 INFO L763 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 [2020-12-17 20:41:40,581 INFO L78 Accepts]: Start accepts. Automaton has 20379 states and 59439 transitions. Word has length 46 [2020-12-17 20:41:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:40,581 INFO L481 AbstractCegarLoop]: Abstraction has 20379 states and 59439 transitions. [2020-12-17 20:41:40,582 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) [2020-12-17 20:41:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 20379 states and 59439 transitions. [2020-12-17 20:41:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:41:40,602 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:40,603 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] [2020-12-17 20:41:40,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-17 20:41:40,811 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:40,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:40,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1275081845, now seen corresponding path program 2 times [2020-12-17 20:41:40,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:40,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456096697] [2020-12-17 20:41:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:41,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456096697] [2020-12-17 20:41:41,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971266510] [2020-12-17 20:41:41,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-17 20:41:41,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:41:41,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:41,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:41:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:41,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:41:41,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:41,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:41,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-17 20:41:41,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977780644] [2020-12-17 20:41:41,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:41:41,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:41,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:41:41,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:41:41,263 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) [2020-12-17 20:41:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:41,955 INFO L93 Difference]: Finished difference Result 22491 states and 65583 transitions. [2020-12-17 20:41:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:41:41,955 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 [2020-12-17 20:41:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:41,956 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2020-12-17 20:41:41,957 INFO L78 Accepts]: Start accepts. Automaton has 22491 states and 65583 transitions. Word has length 46 [2020-12-17 20:41:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:41,957 INFO L481 AbstractCegarLoop]: Abstraction has 22491 states and 65583 transitions. [2020-12-17 20:41:41,957 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) [2020-12-17 20:41:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 22491 states and 65583 transitions. [2020-12-17 20:41:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:41:42,080 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:42,080 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] [2020-12-17 20:41:42,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:41:42,281 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:42,283 INFO L82 PathProgramCache]: Analyzing trace with hash 130938117, now seen corresponding path program 3 times [2020-12-17 20:41:42,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:42,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254560819] [2020-12-17 20:41:42,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:42,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254560819] [2020-12-17 20:41:42,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367991374] [2020-12-17 20:41:42,410 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 [2020-12-17 20:41:42,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-17 20:41:42,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:42,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:41:42,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:42,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:42,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:42,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-17 20:41:42,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870547061] [2020-12-17 20:41:42,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:41:42,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:42,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:41:42,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:41:42,550 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) [2020-12-17 20:41:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:43,128 INFO L93 Difference]: Finished difference Result 25627 states and 74799 transitions. [2020-12-17 20:41:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-17 20:41:43,129 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 [2020-12-17 20:41:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:43,130 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2020-12-17 20:41:43,131 INFO L78 Accepts]: Start accepts. Automaton has 25627 states and 74799 transitions. Word has length 46 [2020-12-17 20:41:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:43,131 INFO L481 AbstractCegarLoop]: Abstraction has 25627 states and 74799 transitions. [2020-12-17 20:41:43,131 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) [2020-12-17 20:41:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 25627 states and 74799 transitions. [2020-12-17 20:41:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:41:43,159 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:43,160 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] [2020-12-17 20:41:43,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:41:43,374 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash 127964887, now seen corresponding path program 4 times [2020-12-17 20:41:43,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:43,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204055029] [2020-12-17 20:41:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:43,622 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2020-12-17 20:41:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:43,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204055029] [2020-12-17 20:41:43,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185205698] [2020-12-17 20:41:43,658 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 [2020-12-17 20:41:43,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:41:43,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:43,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:41:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:43,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:41:43,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:43,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:43,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-17 20:41:43,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525910253] [2020-12-17 20:41:43,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:41:43,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:43,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:41:43,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:41:43,802 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) [2020-12-17 20:41:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:44,488 INFO L93 Difference]: Finished difference Result 25691 states and 74927 transitions. [2020-12-17 20:41:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:41:44,488 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 [2020-12-17 20:41:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:44,489 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-12-17 20:41:44,489 INFO L78 Accepts]: Start accepts. Automaton has 25691 states and 74927 transitions. Word has length 46 [2020-12-17 20:41:44,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:44,490 INFO L481 AbstractCegarLoop]: Abstraction has 25691 states and 74927 transitions. [2020-12-17 20:41:44,490 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) [2020-12-17 20:41:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 25691 states and 74927 transitions. [2020-12-17 20:41:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:41:44,513 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:44,513 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] [2020-12-17 20:41:44,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-17 20:41:44,714 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:44,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1328082230, now seen corresponding path program 5 times [2020-12-17 20:41:44,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:44,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100343803] [2020-12-17 20:41:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:44,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100343803] [2020-12-17 20:41:44,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136029974] [2020-12-17 20:41:44,984 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 [2020-12-17 20:41:45,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-17 20:41:45,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:41:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:45,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:45,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:45,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-17 20:41:45,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980478079] [2020-12-17 20:41:45,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:41:45,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:45,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:41:45,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:41:45,199 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) [2020-12-17 20:41:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:45,666 INFO L93 Difference]: Finished difference Result 27547 states and 80367 transitions. [2020-12-17 20:41:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-17 20:41:45,667 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 [2020-12-17 20:41:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:45,670 INFO L763 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 [2020-12-17 20:41:45,670 INFO L78 Accepts]: Start accepts. Automaton has 27547 states and 80367 transitions. Word has length 51 [2020-12-17 20:41:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:45,671 INFO L481 AbstractCegarLoop]: Abstraction has 27547 states and 80367 transitions. [2020-12-17 20:41:45,671 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) [2020-12-17 20:41:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 27547 states and 80367 transitions. [2020-12-17 20:41:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:41:45,700 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:45,700 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] [2020-12-17 20:41:45,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-17 20:41:45,914 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:45,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:45,915 INFO L82 PathProgramCache]: Analyzing trace with hash -861941604, now seen corresponding path program 6 times [2020-12-17 20:41:45,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:45,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505519383] [2020-12-17 20:41:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:46,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505519383] [2020-12-17 20:41:46,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071017014] [2020-12-17 20:41:46,220 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 [2020-12-17 20:41:46,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-17 20:41:46,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:46,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:41:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:46,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:41:46,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:46,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:46,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-17 20:41:46,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450875868] [2020-12-17 20:41:46,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:41:46,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:41:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:41:46,413 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) [2020-12-17 20:41:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:47,065 INFO L93 Difference]: Finished difference Result 29275 states and 85423 transitions. [2020-12-17 20:41:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:41:47,066 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 [2020-12-17 20:41:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:47,067 INFO L763 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 [2020-12-17 20:41:47,067 INFO L78 Accepts]: Start accepts. Automaton has 29275 states and 85423 transitions. Word has length 51 [2020-12-17 20:41:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:47,068 INFO L481 AbstractCegarLoop]: Abstraction has 29275 states and 85423 transitions. [2020-12-17 20:41:47,068 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) [2020-12-17 20:41:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 29275 states and 85423 transitions. [2020-12-17 20:41:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:41:47,104 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:47,104 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] [2020-12-17 20:41:47,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-17 20:41:47,311 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:47,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1106515018, now seen corresponding path program 7 times [2020-12-17 20:41:47,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:47,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732108422] [2020-12-17 20:41:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:47,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732108422] [2020-12-17 20:41:47,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820065931] [2020-12-17 20:41:47,591 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 [2020-12-17 20:41:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:47,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:41:47,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:47,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:47,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:47,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-17 20:41:47,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060854489] [2020-12-17 20:41:47,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:41:47,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:47,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:41:47,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:41:47,737 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) [2020-12-17 20:41:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:48,308 INFO L93 Difference]: Finished difference Result 31003 states and 90479 transitions. [2020-12-17 20:41:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-17 20:41:48,309 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 [2020-12-17 20:41:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:48,309 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-17 20:41:48,309 INFO L78 Accepts]: Start accepts. Automaton has 31003 states and 90479 transitions. Word has length 51 [2020-12-17 20:41:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:48,310 INFO L481 AbstractCegarLoop]: Abstraction has 31003 states and 90479 transitions. [2020-12-17 20:41:48,310 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) [2020-12-17 20:41:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 31003 states and 90479 transitions. [2020-12-17 20:41:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:41:48,339 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:48,340 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] [2020-12-17 20:41:48,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-17 20:41:48,555 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:48,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:48,556 INFO L82 PathProgramCache]: Analyzing trace with hash -186912122, now seen corresponding path program 8 times [2020-12-17 20:41:48,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:48,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770454191] [2020-12-17 20:41:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:48,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770454191] [2020-12-17 20:41:48,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624245130] [2020-12-17 20:41:48,708 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 [2020-12-17 20:41:48,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:41:48,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:41:48,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:48,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:41:48,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:48,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:48,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-17 20:41:48,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125921994] [2020-12-17 20:41:48,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:41:48,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:48,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:41:48,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:41:48,983 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) [2020-12-17 20:41:49,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:49,724 INFO L93 Difference]: Finished difference Result 36235 states and 105735 transitions. [2020-12-17 20:41:49,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-17 20:41:49,725 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 [2020-12-17 20:41:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:49,725 INFO L763 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 [2020-12-17 20:41:49,725 INFO L78 Accepts]: Start accepts. Automaton has 36235 states and 105735 transitions. Word has length 51 [2020-12-17 20:41:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:49,726 INFO L481 AbstractCegarLoop]: Abstraction has 36235 states and 105735 transitions. [2020-12-17 20:41:49,726 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) [2020-12-17 20:41:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 36235 states and 105735 transitions. [2020-12-17 20:41:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:41:49,755 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:49,755 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] [2020-12-17 20:41:49,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-17 20:41:49,964 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:49,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:49,965 INFO L82 PathProgramCache]: Analyzing trace with hash 165163796, now seen corresponding path program 9 times [2020-12-17 20:41:49,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:49,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270145967] [2020-12-17 20:41:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:50,212 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2020-12-17 20:41:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:50,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270145967] [2020-12-17 20:41:50,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531941563] [2020-12-17 20:41:50,256 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 [2020-12-17 20:41:50,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-17 20:41:50,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:50,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:41:50,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:50,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:50,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:50,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-17 20:41:50,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881211488] [2020-12-17 20:41:50,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:41:50,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:50,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:41:50,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:41:50,393 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) [2020-12-17 20:41:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:51,071 INFO L93 Difference]: Finished difference Result 39499 states and 115335 transitions. [2020-12-17 20:41:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:41:51,072 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 [2020-12-17 20:41:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:51,072 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-17 20:41:51,072 INFO L78 Accepts]: Start accepts. Automaton has 39499 states and 115335 transitions. Word has length 51 [2020-12-17 20:41:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:51,073 INFO L481 AbstractCegarLoop]: Abstraction has 39499 states and 115335 transitions. [2020-12-17 20:41:51,073 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) [2020-12-17 20:41:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 39499 states and 115335 transitions. [2020-12-17 20:41:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:41:51,261 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:51,261 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] [2020-12-17 20:41:51,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:41:51,462 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:51,463 INFO L82 PathProgramCache]: Analyzing trace with hash 162190566, now seen corresponding path program 10 times [2020-12-17 20:41:51,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:51,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622813903] [2020-12-17 20:41:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:51,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622813903] [2020-12-17 20:41:51,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108891698] [2020-12-17 20:41:51,631 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 [2020-12-17 20:41:51,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:41:51,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:51,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:41:51,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:51,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:41:51,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:51,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:51,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-17 20:41:51,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610069686] [2020-12-17 20:41:51,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:41:51,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:51,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:41:51,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:41:51,775 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) [2020-12-17 20:41:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:52,802 INFO L93 Difference]: Finished difference Result 43211 states and 126087 transitions. [2020-12-17 20:41:52,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-17 20:41:52,803 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 [2020-12-17 20:41:52,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:52,803 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-12-17 20:41:52,804 INFO L78 Accepts]: Start accepts. Automaton has 43211 states and 126087 transitions. Word has length 51 [2020-12-17 20:41:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:52,804 INFO L481 AbstractCegarLoop]: Abstraction has 43211 states and 126087 transitions. [2020-12-17 20:41:52,804 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) [2020-12-17 20:41:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 43211 states and 126087 transitions. [2020-12-17 20:41:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:41:52,838 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:52,838 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] [2020-12-17 20:41:53,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:41:53,039 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:53,040 INFO L82 PathProgramCache]: Analyzing trace with hash -688928278, now seen corresponding path program 11 times [2020-12-17 20:41:53,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:53,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661168079] [2020-12-17 20:41:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:53,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661168079] [2020-12-17 20:41:53,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025520744] [2020-12-17 20:41:53,207 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 [2020-12-17 20:41:53,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:41:53,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:53,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:41:53,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:53,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:53,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:53,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-17 20:41:53,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509393018] [2020-12-17 20:41:53,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:41:53,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:53,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:41:53,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:41:53,320 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) [2020-12-17 20:41:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:54,053 INFO L93 Difference]: Finished difference Result 45323 states and 132295 transitions. [2020-12-17 20:41:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-17 20:41:54,054 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 [2020-12-17 20:41:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:54,054 INFO L763 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 [2020-12-17 20:41:54,055 INFO L78 Accepts]: Start accepts. Automaton has 45323 states and 132295 transitions. Word has length 56 [2020-12-17 20:41:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:54,055 INFO L481 AbstractCegarLoop]: Abstraction has 45323 states and 132295 transitions. [2020-12-17 20:41:54,056 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) [2020-12-17 20:41:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 45323 states and 132295 transitions. [2020-12-17 20:41:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:41:54,093 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:54,093 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] [2020-12-17 20:41:54,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-17 20:41:54,294 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:54,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:54,296 INFO L82 PathProgramCache]: Analyzing trace with hash -222787652, now seen corresponding path program 12 times [2020-12-17 20:41:54,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:54,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328818600] [2020-12-17 20:41:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:54,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328818600] [2020-12-17 20:41:54,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780732653] [2020-12-17 20:41:54,482 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 [2020-12-17 20:41:54,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:41:54,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:54,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:41:54,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:54,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:41:54,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:54,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:54,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-17 20:41:54,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582982075] [2020-12-17 20:41:54,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:41:54,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:54,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:41:54,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:41:54,617 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) [2020-12-17 20:41:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:55,712 INFO L93 Difference]: Finished difference Result 47051 states and 137351 transitions. [2020-12-17 20:41:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:41:55,713 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 [2020-12-17 20:41:55,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:55,715 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=665, Unknown=0, NotChecked=0, Total=930 [2020-12-17 20:41:55,715 INFO L78 Accepts]: Start accepts. Automaton has 47051 states and 137351 transitions. Word has length 56 [2020-12-17 20:41:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:55,715 INFO L481 AbstractCegarLoop]: Abstraction has 47051 states and 137351 transitions. [2020-12-17 20:41:55,716 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) [2020-12-17 20:41:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 47051 states and 137351 transitions. [2020-12-17 20:41:55,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:41:55,749 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:55,749 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] [2020-12-17 20:41:55,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:41:55,953 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:55,954 INFO L82 PathProgramCache]: Analyzing trace with hash -467361066, now seen corresponding path program 13 times [2020-12-17 20:41:55,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:55,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723038395] [2020-12-17 20:41:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:56,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723038395] [2020-12-17 20:41:56,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453370834] [2020-12-17 20:41:56,095 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 [2020-12-17 20:41:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:41:56,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:56,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:56,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:56,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-17 20:41:56,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195382157] [2020-12-17 20:41:56,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:41:56,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:56,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:41:56,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:41:56,213 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) [2020-12-17 20:41:57,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:57,084 INFO L93 Difference]: Finished difference Result 48907 states and 142791 transitions. [2020-12-17 20:41:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-17 20:41:57,084 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 [2020-12-17 20:41:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:57,085 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2020-12-17 20:41:57,085 INFO L78 Accepts]: Start accepts. Automaton has 48907 states and 142791 transitions. Word has length 56 [2020-12-17 20:41:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:57,086 INFO L481 AbstractCegarLoop]: Abstraction has 48907 states and 142791 transitions. [2020-12-17 20:41:57,086 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) [2020-12-17 20:41:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48907 states and 142791 transitions. [2020-12-17 20:41:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:41:57,130 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:57,130 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] [2020-12-17 20:41:57,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-17 20:41:57,331 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash 452241830, now seen corresponding path program 14 times [2020-12-17 20:41:57,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:57,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908745516] [2020-12-17 20:41:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:57,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908745516] [2020-12-17 20:41:57,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761406772] [2020-12-17 20:41:57,519 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 [2020-12-17 20:41:57,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:41:57,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:41:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:57,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:41:57,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:57,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:57,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-17 20:41:57,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365247989] [2020-12-17 20:41:57,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:41:57,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:57,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:41:57,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:41:57,749 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) [2020-12-17 20:41:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:41:59,109 INFO L93 Difference]: Finished difference Result 51019 states and 148935 transitions. [2020-12-17 20:41:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-17 20:41:59,110 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 [2020-12-17 20:41:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:41:59,111 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-12-17 20:41:59,111 INFO L78 Accepts]: Start accepts. Automaton has 51019 states and 148935 transitions. Word has length 56 [2020-12-17 20:41:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:41:59,111 INFO L481 AbstractCegarLoop]: Abstraction has 51019 states and 148935 transitions. [2020-12-17 20:41:59,111 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) [2020-12-17 20:41:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 51019 states and 148935 transitions. [2020-12-17 20:41:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:41:59,148 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:41:59,148 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] [2020-12-17 20:41:59,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-17 20:41:59,349 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:41:59,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:41:59,350 INFO L82 PathProgramCache]: Analyzing trace with hash 804317748, now seen corresponding path program 15 times [2020-12-17 20:41:59,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:41:59,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880593490] [2020-12-17 20:41:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:41:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:41:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:59,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880593490] [2020-12-17 20:41:59,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107177266] [2020-12-17 20:41:59,478 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 [2020-12-17 20:41:59,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-17 20:41:59,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:41:59,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:41:59,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:41:59,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:41:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:41:59,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:41:59,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-17 20:41:59,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110689557] [2020-12-17 20:41:59,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:41:59,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:41:59,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:41:59,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:41:59,615 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) [2020-12-17 20:42:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:00,393 INFO L93 Difference]: Finished difference Result 54155 states and 158151 transitions. [2020-12-17 20:42:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:42:00,394 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 [2020-12-17 20:42:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:00,395 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-17 20:42:00,395 INFO L78 Accepts]: Start accepts. Automaton has 54155 states and 158151 transitions. Word has length 56 [2020-12-17 20:42:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:00,395 INFO L481 AbstractCegarLoop]: Abstraction has 54155 states and 158151 transitions. [2020-12-17 20:42:00,395 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) [2020-12-17 20:42:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 54155 states and 158151 transitions. [2020-12-17 20:42:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:42:00,433 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:00,434 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] [2020-12-17 20:42:00,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-17 20:42:00,635 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:00,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:00,636 INFO L82 PathProgramCache]: Analyzing trace with hash 801344518, now seen corresponding path program 16 times [2020-12-17 20:42:00,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:00,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267857448] [2020-12-17 20:42:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:01,120 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 3 [2020-12-17 20:42:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:01,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267857448] [2020-12-17 20:42:01,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774929285] [2020-12-17 20:42:01,201 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 [2020-12-17 20:42:01,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:42:01,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:42:01,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:01,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:01,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:01,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:01,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-12-17 20:42:01,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136467261] [2020-12-17 20:42:01,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:42:01,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:01,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:42:01,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:42:01,361 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) [2020-12-17 20:42:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:02,465 INFO L93 Difference]: Finished difference Result 55499 states and 161991 transitions. [2020-12-17 20:42:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:42:02,465 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 [2020-12-17 20:42:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:02,467 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:42:02,467 INFO L78 Accepts]: Start accepts. Automaton has 55499 states and 161991 transitions. Word has length 56 [2020-12-17 20:42:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:02,467 INFO L481 AbstractCegarLoop]: Abstraction has 55499 states and 161991 transitions. [2020-12-17 20:42:02,468 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) [2020-12-17 20:42:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 55499 states and 161991 transitions. [2020-12-17 20:42:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:02,529 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:02,530 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] [2020-12-17 20:42:02,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-17 20:42:02,732 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:02,733 INFO L82 PathProgramCache]: Analyzing trace with hash 548080699, now seen corresponding path program 17 times [2020-12-17 20:42:02,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:02,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890077167] [2020-12-17 20:42:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:03,077 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-17 20:42:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:03,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890077167] [2020-12-17 20:42:03,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540654598] [2020-12-17 20:42:03,168 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 [2020-12-17 20:42:03,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:42:03,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:03,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:03,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:03,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:03,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:42:03,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735980589] [2020-12-17 20:42:03,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:42:03,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:03,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:42:03,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:42:03,307 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) [2020-12-17 20:42:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:04,032 INFO L93 Difference]: Finished difference Result 57483 states and 167815 transitions. [2020-12-17 20:42:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:42:04,032 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 [2020-12-17 20:42:04,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:04,033 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2020-12-17 20:42:04,034 INFO L78 Accepts]: Start accepts. Automaton has 57483 states and 167815 transitions. Word has length 61 [2020-12-17 20:42:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:04,034 INFO L481 AbstractCegarLoop]: Abstraction has 57483 states and 167815 transitions. [2020-12-17 20:42:04,035 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) [2020-12-17 20:42:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 57483 states and 167815 transitions. [2020-12-17 20:42:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:04,094 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:04,094 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] [2020-12-17 20:42:04,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-17 20:42:04,303 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:04,304 INFO L82 PathProgramCache]: Analyzing trace with hash 503720845, now seen corresponding path program 18 times [2020-12-17 20:42:04,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:04,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91124568] [2020-12-17 20:42:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:04,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91124568] [2020-12-17 20:42:04,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046928938] [2020-12-17 20:42:04,500 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 [2020-12-17 20:42:04,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:42:04,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:04,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:04,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:04,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:04,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:04,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-17 20:42:04,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159621372] [2020-12-17 20:42:04,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:04,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:04,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:04,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:04,885 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) [2020-12-17 20:42:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:05,793 INFO L93 Difference]: Finished difference Result 59339 states and 173255 transitions. [2020-12-17 20:42:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:42:05,794 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 [2020-12-17 20:42:05,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:05,794 INFO L763 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 [2020-12-17 20:42:05,795 INFO L78 Accepts]: Start accepts. Automaton has 59339 states and 173255 transitions. Word has length 61 [2020-12-17 20:42:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:05,795 INFO L481 AbstractCegarLoop]: Abstraction has 59339 states and 173255 transitions. [2020-12-17 20:42:05,795 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) [2020-12-17 20:42:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 59339 states and 173255 transitions. [2020-12-17 20:42:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:05,862 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:05,862 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] [2020-12-17 20:42:06,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:06,069 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1988537895, now seen corresponding path program 19 times [2020-12-17 20:42:06,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:06,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747589136] [2020-12-17 20:42:06,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:06,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747589136] [2020-12-17 20:42:06,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093926264] [2020-12-17 20:42:06,272 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 [2020-12-17 20:42:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:06,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:06,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:06,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:06,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:42:06,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383579818] [2020-12-17 20:42:06,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:42:06,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:06,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:42:06,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:42:06,427 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) [2020-12-17 20:42:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:07,575 INFO L93 Difference]: Finished difference Result 61195 states and 178695 transitions. [2020-12-17 20:42:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-17 20:42:07,575 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 [2020-12-17 20:42:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:07,576 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=769, Unknown=0, NotChecked=0, Total=1056 [2020-12-17 20:42:07,577 INFO L78 Accepts]: Start accepts. Automaton has 61195 states and 178695 transitions. Word has length 61 [2020-12-17 20:42:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:07,577 INFO L481 AbstractCegarLoop]: Abstraction has 61195 states and 178695 transitions. [2020-12-17 20:42:07,578 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) [2020-12-17 20:42:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 61195 states and 178695 transitions. [2020-12-17 20:42:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:07,628 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:07,628 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] [2020-12-17 20:42:07,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-17 20:42:07,830 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:07,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1084722953, now seen corresponding path program 20 times [2020-12-17 20:42:07,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:07,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80292478] [2020-12-17 20:42:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:08,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80292478] [2020-12-17 20:42:08,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671167506] [2020-12-17 20:42:08,025 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 [2020-12-17 20:42:08,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:42:08,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:08,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:08,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:08,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:08,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:08,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-17 20:42:08,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415855593] [2020-12-17 20:42:08,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:08,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:08,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:08,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:08,201 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) [2020-12-17 20:42:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:09,530 INFO L93 Difference]: Finished difference Result 64523 states and 188423 transitions. [2020-12-17 20:42:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-17 20:42:09,533 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 [2020-12-17 20:42:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:09,536 INFO L763 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 [2020-12-17 20:42:09,536 INFO L78 Accepts]: Start accepts. Automaton has 64523 states and 188423 transitions. Word has length 61 [2020-12-17 20:42:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:09,537 INFO L481 AbstractCegarLoop]: Abstraction has 64523 states and 188423 transitions. [2020-12-17 20:42:09,537 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) [2020-12-17 20:42:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 64523 states and 188423 transitions. [2020-12-17 20:42:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:09,609 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:09,609 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] [2020-12-17 20:42:09,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:09,825 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:09,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2120210981, now seen corresponding path program 21 times [2020-12-17 20:42:09,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:09,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745578244] [2020-12-17 20:42:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:09,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745578244] [2020-12-17 20:42:10,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023259571] [2020-12-17 20:42:10,000 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 [2020-12-17 20:42:10,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-17 20:42:10,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:10,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:10,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:10,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:10,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:42:10,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571824184] [2020-12-17 20:42:10,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:42:10,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:10,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:42:10,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:42:10,141 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) [2020-12-17 20:42:11,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:11,180 INFO L93 Difference]: Finished difference Result 66379 states and 193863 transitions. [2020-12-17 20:42:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:42:11,181 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 [2020-12-17 20:42:11,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:11,182 INFO L763 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 [2020-12-17 20:42:11,183 INFO L78 Accepts]: Start accepts. Automaton has 66379 states and 193863 transitions. Word has length 61 [2020-12-17 20:42:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:11,183 INFO L481 AbstractCegarLoop]: Abstraction has 66379 states and 193863 transitions. [2020-12-17 20:42:11,183 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) [2020-12-17 20:42:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 66379 states and 193863 transitions. [2020-12-17 20:42:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:11,260 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:11,261 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] [2020-12-17 20:42:11,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-17 20:42:11,477 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:11,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1255153419, now seen corresponding path program 22 times [2020-12-17 20:42:11,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:11,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283198026] [2020-12-17 20:42:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:11,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283198026] [2020-12-17 20:42:11,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931390644] [2020-12-17 20:42:11,638 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 [2020-12-17 20:42:11,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:42:11,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:11,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:42:12,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:12,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:12,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:12,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:12,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-17 20:42:12,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25389889] [2020-12-17 20:42:12,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:12,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:12,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:12,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:12,168 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) [2020-12-17 20:42:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:13,315 INFO L93 Difference]: Finished difference Result 69259 states and 202247 transitions. [2020-12-17 20:42:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-17 20:42:13,316 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 [2020-12-17 20:42:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:13,317 INFO L763 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 [2020-12-17 20:42:13,317 INFO L78 Accepts]: Start accepts. Automaton has 69259 states and 202247 transitions. Word has length 61 [2020-12-17 20:42:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:13,318 INFO L481 AbstractCegarLoop]: Abstraction has 69259 states and 202247 transitions. [2020-12-17 20:42:13,318 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) [2020-12-17 20:42:13,318 INFO L276 IsEmpty]: Start isEmpty. Operand 69259 states and 202247 transitions. [2020-12-17 20:42:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:13,374 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:13,374 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] [2020-12-17 20:42:13,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:13,581 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:13,582 INFO L82 PathProgramCache]: Analyzing trace with hash -903077501, now seen corresponding path program 23 times [2020-12-17 20:42:13,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:13,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800834464] [2020-12-17 20:42:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:13,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800834464] [2020-12-17 20:42:13,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335722450] [2020-12-17 20:42:13,761 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 [2020-12-17 20:42:13,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:42:13,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:13,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:13,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:13,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:13,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:13,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:42:13,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860271081] [2020-12-17 20:42:13,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:42:13,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:13,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:42:13,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:42:13,896 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) [2020-12-17 20:42:14,515 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2020-12-17 20:42:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:15,316 INFO L93 Difference]: Finished difference Result 72523 states and 211847 transitions. [2020-12-17 20:42:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:42:15,316 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 [2020-12-17 20:42:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:15,317 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:42:15,318 INFO L78 Accepts]: Start accepts. Automaton has 72523 states and 211847 transitions. Word has length 61 [2020-12-17 20:42:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:15,318 INFO L481 AbstractCegarLoop]: Abstraction has 72523 states and 211847 transitions. [2020-12-17 20:42:15,318 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) [2020-12-17 20:42:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 72523 states and 211847 transitions. [2020-12-17 20:42:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:15,387 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:15,387 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] [2020-12-17 20:42:15,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-17 20:42:15,588 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:15,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:15,589 INFO L82 PathProgramCache]: Analyzing trace with hash -906050731, now seen corresponding path program 24 times [2020-12-17 20:42:15,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:15,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782672134] [2020-12-17 20:42:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:15,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782672134] [2020-12-17 20:42:15,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527786859] [2020-12-17 20:42:15,772 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 [2020-12-17 20:42:15,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:42:15,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:15,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:15,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:15,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:15,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:15,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:15,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:42:15,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986044228] [2020-12-17 20:42:15,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:42:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:15,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:42:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:42:15,924 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) [2020-12-17 20:42:17,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:17,582 INFO L93 Difference]: Finished difference Result 72587 states and 211975 transitions. [2020-12-17 20:42:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-17 20:42:17,583 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 [2020-12-17 20:42:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:17,583 INFO L763 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 [2020-12-17 20:42:17,584 INFO L78 Accepts]: Start accepts. Automaton has 72587 states and 211975 transitions. Word has length 61 [2020-12-17 20:42:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:17,584 INFO L481 AbstractCegarLoop]: Abstraction has 72587 states and 211975 transitions. [2020-12-17 20:42:17,584 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) [2020-12-17 20:42:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 72587 states and 211975 transitions. [2020-12-17 20:42:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:42:17,655 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:17,655 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] [2020-12-17 20:42:17,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:17,856 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1591649445, now seen corresponding path program 25 times [2020-12-17 20:42:17,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:17,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784381293] [2020-12-17 20:42:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:18,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784381293] [2020-12-17 20:42:18,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788630332] [2020-12-17 20:42:18,064 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 [2020-12-17 20:42:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:18,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:42:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:18,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:18,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:18,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:42:18,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599792405] [2020-12-17 20:42:18,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:18,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:18,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:18,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:18,193 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) [2020-12-17 20:42:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:18,998 INFO L93 Difference]: Finished difference Result 74955 states and 218951 transitions. [2020-12-17 20:42:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-17 20:42:19,001 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 [2020-12-17 20:42:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:19,002 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2020-12-17 20:42:19,002 INFO L78 Accepts]: Start accepts. Automaton has 74955 states and 218951 transitions. Word has length 66 [2020-12-17 20:42:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:19,003 INFO L481 AbstractCegarLoop]: Abstraction has 74955 states and 218951 transitions. [2020-12-17 20:42:19,003 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) [2020-12-17 20:42:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 74955 states and 218951 transitions. [2020-12-17 20:42:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:42:19,079 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:19,079 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] [2020-12-17 20:42:19,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-17 20:42:19,280 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:19,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:19,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1636009299, now seen corresponding path program 26 times [2020-12-17 20:42:19,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:19,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855281587] [2020-12-17 20:42:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:19,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855281587] [2020-12-17 20:42:19,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860855583] [2020-12-17 20:42:19,991 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 [2020-12-17 20:42:20,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:42:20,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:20,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:42:20,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:20,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:20,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:20,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:20,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-17 20:42:20,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16820776] [2020-12-17 20:42:20,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:42:20,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:20,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:42:20,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:42:20,152 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) [2020-12-17 20:42:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:21,192 INFO L93 Difference]: Finished difference Result 76811 states and 224391 transitions. [2020-12-17 20:42:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:42:21,193 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 [2020-12-17 20:42:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:21,194 INFO L763 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 [2020-12-17 20:42:21,194 INFO L78 Accepts]: Start accepts. Automaton has 76811 states and 224391 transitions. Word has length 66 [2020-12-17 20:42:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:21,194 INFO L481 AbstractCegarLoop]: Abstraction has 76811 states and 224391 transitions. [2020-12-17 20:42:21,195 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) [2020-12-17 20:42:21,195 INFO L276 IsEmpty]: Start isEmpty. Operand 76811 states and 224391 transitions. [2020-12-17 20:42:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:42:21,270 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:21,270 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] [2020-12-17 20:42:21,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:21,471 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash -151192249, now seen corresponding path program 27 times [2020-12-17 20:42:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:21,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897963728] [2020-12-17 20:42:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:21,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897963728] [2020-12-17 20:42:21,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697098673] [2020-12-17 20:42:21,669 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 [2020-12-17 20:42:21,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-17 20:42:21,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:21,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:42:21,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:21,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:21,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:21,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:42:21,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079115818] [2020-12-17 20:42:21,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:21,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:21,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:21,810 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) [2020-12-17 20:42:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:23,037 INFO L93 Difference]: Finished difference Result 78795 states and 230215 transitions. [2020-12-17 20:42:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-17 20:42:23,037 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 [2020-12-17 20:42:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:23,038 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-12-17 20:42:23,039 INFO L78 Accepts]: Start accepts. Automaton has 78795 states and 230215 transitions. Word has length 66 [2020-12-17 20:42:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:23,039 INFO L481 AbstractCegarLoop]: Abstraction has 78795 states and 230215 transitions. [2020-12-17 20:42:23,039 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) [2020-12-17 20:42:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 78795 states and 230215 transitions. [2020-12-17 20:42:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:42:23,120 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:23,120 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] [2020-12-17 20:42:23,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-17 20:42:23,321 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:23,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:23,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1070514199, now seen corresponding path program 28 times [2020-12-17 20:42:23,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:23,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415412247] [2020-12-17 20:42:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:23,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415412247] [2020-12-17 20:42:23,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499867678] [2020-12-17 20:42:23,529 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 [2020-12-17 20:42:23,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:42:23,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:23,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:42:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:23,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:23,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:23,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:23,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-17 20:42:23,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401787140] [2020-12-17 20:42:23,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:42:23,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:23,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:42:23,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:42:23,689 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) [2020-12-17 20:42:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:25,359 INFO L93 Difference]: Finished difference Result 80395 states and 234887 transitions. [2020-12-17 20:42:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:42:25,360 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 [2020-12-17 20:42:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:25,361 INFO L763 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 [2020-12-17 20:42:25,361 INFO L78 Accepts]: Start accepts. Automaton has 80395 states and 234887 transitions. Word has length 66 [2020-12-17 20:42:25,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:25,361 INFO L481 AbstractCegarLoop]: Abstraction has 80395 states and 234887 transitions. [2020-12-17 20:42:25,362 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) [2020-12-17 20:42:25,362 INFO L276 IsEmpty]: Start isEmpty. Operand 80395 states and 234887 transitions. [2020-12-17 20:42:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:42:25,450 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:25,450 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] [2020-12-17 20:42:25,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-17 20:42:25,651 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:25,653 INFO L82 PathProgramCache]: Analyzing trace with hash -19519163, now seen corresponding path program 29 times [2020-12-17 20:42:25,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:25,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516396059] [2020-12-17 20:42:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:25,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516396059] [2020-12-17 20:42:25,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028612320] [2020-12-17 20:42:25,869 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 [2020-12-17 20:42:25,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:42:25,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:25,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:42:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:26,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:26,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:26,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:42:26,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386645070] [2020-12-17 20:42:26,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:26,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:26,015 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) [2020-12-17 20:42:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:27,204 INFO L93 Difference]: Finished difference Result 82123 states and 239943 transitions. [2020-12-17 20:42:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:42:27,205 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 [2020-12-17 20:42:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:27,206 INFO L763 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 [2020-12-17 20:42:27,206 INFO L78 Accepts]: Start accepts. Automaton has 82123 states and 239943 transitions. Word has length 66 [2020-12-17 20:42:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:27,206 INFO L481 AbstractCegarLoop]: Abstraction has 82123 states and 239943 transitions. [2020-12-17 20:42:27,206 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) [2020-12-17 20:42:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 82123 states and 239943 transitions. [2020-12-17 20:42:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:42:27,786 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:27,786 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] [2020-12-17 20:42:27,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-17 20:42:27,999 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:28,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:28,000 INFO L82 PathProgramCache]: Analyzing trace with hash 900083733, now seen corresponding path program 30 times [2020-12-17 20:42:28,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:28,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097731722] [2020-12-17 20:42:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:28,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097731722] [2020-12-17 20:42:28,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616910711] [2020-12-17 20:42:28,194 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 [2020-12-17 20:42:28,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-17 20:42:28,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:28,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:42:28,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:28,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:28,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:28,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:28,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-17 20:42:28,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029661822] [2020-12-17 20:42:28,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:42:28,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:28,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:42:28,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:42:28,378 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) [2020-12-17 20:42:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:29,758 INFO L93 Difference]: Finished difference Result 85003 states and 248327 transitions. [2020-12-17 20:42:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:42:29,759 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 [2020-12-17 20:42:29,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:29,760 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=484, Invalid=1238, Unknown=0, NotChecked=0, Total=1722 [2020-12-17 20:42:29,760 INFO L78 Accepts]: Start accepts. Automaton has 85003 states and 248327 transitions. Word has length 66 [2020-12-17 20:42:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:29,761 INFO L481 AbstractCegarLoop]: Abstraction has 85003 states and 248327 transitions. [2020-12-17 20:42:29,761 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) [2020-12-17 20:42:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 85003 states and 248327 transitions. [2020-12-17 20:42:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:42:29,841 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:29,841 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] [2020-12-17 20:42:30,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-17 20:42:30,056 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1252159651, now seen corresponding path program 31 times [2020-12-17 20:42:30,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:30,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116114260] [2020-12-17 20:42:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:30,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116114260] [2020-12-17 20:42:30,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963538194] [2020-12-17 20:42:30,230 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 [2020-12-17 20:42:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:30,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:42:30,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:30,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:30,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:30,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:42:30,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888147214] [2020-12-17 20:42:30,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:30,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:30,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:30,368 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) [2020-12-17 20:42:30,875 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2020-12-17 20:42:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:31,880 INFO L93 Difference]: Finished difference Result 88267 states and 257927 transitions. [2020-12-17 20:42:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:42:31,881 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 [2020-12-17 20:42:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:31,882 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=443, Invalid=1039, Unknown=0, NotChecked=0, Total=1482 [2020-12-17 20:42:31,882 INFO L78 Accepts]: Start accepts. Automaton has 88267 states and 257927 transitions. Word has length 66 [2020-12-17 20:42:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:31,882 INFO L481 AbstractCegarLoop]: Abstraction has 88267 states and 257927 transitions. [2020-12-17 20:42:31,883 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) [2020-12-17 20:42:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 88267 states and 257927 transitions. [2020-12-17 20:42:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:42:31,959 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:31,959 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] [2020-12-17 20:42:32,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:32,173 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:32,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1249186421, now seen corresponding path program 32 times [2020-12-17 20:42:32,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:32,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686917115] [2020-12-17 20:42:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:32,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686917115] [2020-12-17 20:42:32,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337361177] [2020-12-17 20:42:32,353 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 [2020-12-17 20:42:32,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:42:32,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:32,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:42:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:32,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:32,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:32,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:32,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:42:32,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566727946] [2020-12-17 20:42:32,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:32,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:32,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:32,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:32,490 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) [2020-12-17 20:42:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:34,273 INFO L93 Difference]: Finished difference Result 88331 states and 258055 transitions. [2020-12-17 20:42:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:42:34,274 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 [2020-12-17 20:42:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:34,275 INFO L763 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 [2020-12-17 20:42:34,275 INFO L78 Accepts]: Start accepts. Automaton has 88331 states and 258055 transitions. Word has length 66 [2020-12-17 20:42:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:34,275 INFO L481 AbstractCegarLoop]: Abstraction has 88331 states and 258055 transitions. [2020-12-17 20:42:34,275 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) [2020-12-17 20:42:34,276 INFO L276 IsEmpty]: Start isEmpty. Operand 88331 states and 258055 transitions. [2020-12-17 20:42:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:42:34,365 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:34,365 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] [2020-12-17 20:42:34,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-17 20:42:34,567 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1334750316, now seen corresponding path program 33 times [2020-12-17 20:42:34,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:34,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561614202] [2020-12-17 20:42:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:34,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561614202] [2020-12-17 20:42:34,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108701235] [2020-12-17 20:42:34,795 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 [2020-12-17 20:42:34,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-17 20:42:34,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:34,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:42:34,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:34,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:34,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:34,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:42:34,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43125109] [2020-12-17 20:42:34,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:34,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:34,927 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) [2020-12-17 20:42:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:36,360 INFO L93 Difference]: Finished difference Result 90443 states and 264263 transitions. [2020-12-17 20:42:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:42:36,361 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 [2020-12-17 20:42:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:36,361 INFO L763 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 [2020-12-17 20:42:36,362 INFO L78 Accepts]: Start accepts. Automaton has 90443 states and 264263 transitions. Word has length 71 [2020-12-17 20:42:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:36,362 INFO L481 AbstractCegarLoop]: Abstraction has 90443 states and 264263 transitions. [2020-12-17 20:42:36,362 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) [2020-12-17 20:42:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 90443 states and 264263 transitions. [2020-12-17 20:42:36,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:42:36,479 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:36,479 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] [2020-12-17 20:42:36,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-17 20:42:36,680 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:36,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:36,681 INFO L82 PathProgramCache]: Analyzing trace with hash -99594946, now seen corresponding path program 34 times [2020-12-17 20:42:36,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:36,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923820345] [2020-12-17 20:42:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:36,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923820345] [2020-12-17 20:42:36,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104846776] [2020-12-17 20:42:36,951 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 [2020-12-17 20:42:37,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:42:37,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:42:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:37,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:37,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:37,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:37,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:42:37,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127894822] [2020-12-17 20:42:37,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:42:37,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:37,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:42:37,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:42:37,120 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) [2020-12-17 20:42:38,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:38,364 INFO L93 Difference]: Finished difference Result 92427 states and 270087 transitions. [2020-12-17 20:42:38,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:42:38,365 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 [2020-12-17 20:42:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:38,366 INFO L763 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 [2020-12-17 20:42:38,366 INFO L78 Accepts]: Start accepts. Automaton has 92427 states and 270087 transitions. Word has length 71 [2020-12-17 20:42:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:38,366 INFO L481 AbstractCegarLoop]: Abstraction has 92427 states and 270087 transitions. [2020-12-17 20:42:38,367 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) [2020-12-17 20:42:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 92427 states and 270087 transitions. [2020-12-17 20:42:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:42:38,485 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:38,485 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] [2020-12-17 20:42:38,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:38,686 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1726601048, now seen corresponding path program 35 times [2020-12-17 20:42:38,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:38,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213055492] [2020-12-17 20:42:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:38,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213055492] [2020-12-17 20:42:38,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256865078] [2020-12-17 20:42:38,929 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 [2020-12-17 20:42:39,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:42:39,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:39,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:42:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:39,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:39,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:39,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:42:39,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380235460] [2020-12-17 20:42:39,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:39,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:39,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:39,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:39,514 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) [2020-12-17 20:42:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:40,574 INFO L93 Difference]: Finished difference Result 94411 states and 275911 transitions. [2020-12-17 20:42:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-17 20:42:40,575 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 [2020-12-17 20:42:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:40,576 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:42:40,576 INFO L78 Accepts]: Start accepts. Automaton has 94411 states and 275911 transitions. Word has length 71 [2020-12-17 20:42:40,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:40,576 INFO L481 AbstractCegarLoop]: Abstraction has 94411 states and 275911 transitions. [2020-12-17 20:42:40,576 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) [2020-12-17 20:42:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 94411 states and 275911 transitions. [2020-12-17 20:42:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:42:40,672 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:40,672 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] [2020-12-17 20:42:40,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-17 20:42:40,873 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:40,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:40,874 INFO L82 PathProgramCache]: Analyzing trace with hash -406694360, now seen corresponding path program 36 times [2020-12-17 20:42:40,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:40,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594246563] [2020-12-17 20:42:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:41,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594246563] [2020-12-17 20:42:41,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726311903] [2020-12-17 20:42:41,095 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 [2020-12-17 20:42:41,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-17 20:42:41,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:41,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:42:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:41,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:41,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:41,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:41,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:42:41,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758895078] [2020-12-17 20:42:41,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:42:41,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:42:41,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:42:41,245 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) [2020-12-17 20:42:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:42,916 INFO L93 Difference]: Finished difference Result 97867 states and 286023 transitions. [2020-12-17 20:42:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-17 20:42:42,917 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 [2020-12-17 20:42:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:42,917 INFO L763 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 [2020-12-17 20:42:42,917 INFO L78 Accepts]: Start accepts. Automaton has 97867 states and 286023 transitions. Word has length 71 [2020-12-17 20:42:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:42,918 INFO L481 AbstractCegarLoop]: Abstraction has 97867 states and 286023 transitions. [2020-12-17 20:42:42,918 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) [2020-12-17 20:42:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 97867 states and 286023 transitions. [2020-12-17 20:42:43,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:42:43,014 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:43,014 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] [2020-12-17 20:42:43,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:43,215 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1483906518, now seen corresponding path program 37 times [2020-12-17 20:42:43,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:43,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394644795] [2020-12-17 20:42:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:43,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394644795] [2020-12-17 20:42:43,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835015126] [2020-12-17 20:42:43,445 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 [2020-12-17 20:42:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:43,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:42:43,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:43,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:43,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:43,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:42:43,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113025421] [2020-12-17 20:42:43,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:43,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:43,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:43,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:43,554 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) [2020-12-17 20:42:45,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:45,302 INFO L93 Difference]: Finished difference Result 99851 states and 291847 transitions. [2020-12-17 20:42:45,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:42:45,303 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 [2020-12-17 20:42:45,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:45,304 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=458, Invalid=1182, Unknown=0, NotChecked=0, Total=1640 [2020-12-17 20:42:45,305 INFO L78 Accepts]: Start accepts. Automaton has 99851 states and 291847 transitions. Word has length 71 [2020-12-17 20:42:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:45,307 INFO L481 AbstractCegarLoop]: Abstraction has 99851 states and 291847 transitions. [2020-12-17 20:42:45,307 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) [2020-12-17 20:42:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 99851 states and 291847 transitions. [2020-12-17 20:42:45,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:42:45,399 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:45,400 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] [2020-12-17 20:42:45,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-17 20:42:45,601 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1589354330, now seen corresponding path program 38 times [2020-12-17 20:42:45,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:45,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764536926] [2020-12-17 20:42:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:45,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764536926] [2020-12-17 20:42:45,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021336429] [2020-12-17 20:42:45,813 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 [2020-12-17 20:42:45,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:42:45,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:45,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:42:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:45,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:45,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:45,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:45,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:42:45,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108440860] [2020-12-17 20:42:45,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:42:45,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:45,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:42:45,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:42:45,959 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) [2020-12-17 20:42:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:47,353 INFO L93 Difference]: Finished difference Result 101451 states and 296519 transitions. [2020-12-17 20:42:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-17 20:42:47,354 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 [2020-12-17 20:42:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:47,355 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=488, Invalid=1318, Unknown=0, NotChecked=0, Total=1806 [2020-12-17 20:42:47,356 INFO L78 Accepts]: Start accepts. Automaton has 101451 states and 296519 transitions. Word has length 71 [2020-12-17 20:42:47,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:47,356 INFO L481 AbstractCegarLoop]: Abstraction has 101451 states and 296519 transitions. [2020-12-17 20:42:47,357 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) [2020-12-17 20:42:47,357 INFO L276 IsEmpty]: Start isEmpty. Operand 101451 states and 296519 transitions. [2020-12-17 20:42:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:42:48,012 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:48,012 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] [2020-12-17 20:42:48,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:48,227 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1615579604, now seen corresponding path program 39 times [2020-12-17 20:42:48,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:48,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094421423] [2020-12-17 20:42:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:48,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094421423] [2020-12-17 20:42:48,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394776292] [2020-12-17 20:42:48,440 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 [2020-12-17 20:42:48,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-17 20:42:48,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:48,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:42:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:48,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:48,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:48,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:42:48,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382840385] [2020-12-17 20:42:48,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:48,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:48,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:48,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:48,578 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) [2020-12-17 20:42:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:50,038 INFO L93 Difference]: Finished difference Result 103307 states and 301959 transitions. [2020-12-17 20:42:50,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:42:50,038 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 [2020-12-17 20:42:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:50,040 INFO L763 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 [2020-12-17 20:42:50,040 INFO L78 Accepts]: Start accepts. Automaton has 103307 states and 301959 transitions. Word has length 71 [2020-12-17 20:42:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:50,040 INFO L481 AbstractCegarLoop]: Abstraction has 103307 states and 301959 transitions. [2020-12-17 20:42:50,041 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) [2020-12-17 20:42:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 103307 states and 301959 transitions. [2020-12-17 20:42:50,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:42:50,163 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:50,163 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] [2020-12-17 20:42:50,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-17 20:42:50,365 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:50,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:50,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1759784796, now seen corresponding path program 40 times [2020-12-17 20:42:50,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:50,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556213660] [2020-12-17 20:42:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:50,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556213660] [2020-12-17 20:42:50,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712070499] [2020-12-17 20:42:50,617 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 [2020-12-17 20:42:50,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:42:50,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:50,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:42:50,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:50,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:50,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:50,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:50,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:42:50,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958512379] [2020-12-17 20:42:50,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:42:50,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:50,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:42:50,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:42:50,801 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) [2020-12-17 20:42:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:52,851 INFO L93 Difference]: Finished difference Result 105419 states and 308103 transitions. [2020-12-17 20:42:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-17 20:42:52,851 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 [2020-12-17 20:42:52,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:52,853 INFO L763 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 [2020-12-17 20:42:52,853 INFO L78 Accepts]: Start accepts. Automaton has 105419 states and 308103 transitions. Word has length 71 [2020-12-17 20:42:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:52,853 INFO L481 AbstractCegarLoop]: Abstraction has 105419 states and 308103 transitions. [2020-12-17 20:42:52,853 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) [2020-12-17 20:42:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 105419 states and 308103 transitions. [2020-12-17 20:42:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:42:52,958 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:52,958 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] [2020-12-17 20:42:53,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-17 20:42:53,159 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:53,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1407708878, now seen corresponding path program 41 times [2020-12-17 20:42:53,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:53,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784470434] [2020-12-17 20:42:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:53,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784470434] [2020-12-17 20:42:53,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860829142] [2020-12-17 20:42:53,343 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 [2020-12-17 20:42:53,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:42:53,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:42:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:53,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:53,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:53,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:42:53,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368229233] [2020-12-17 20:42:53,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:42:53,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:53,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:42:53,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:53,442 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) [2020-12-17 20:42:55,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:55,272 INFO L93 Difference]: Finished difference Result 108555 states and 317319 transitions. [2020-12-17 20:42:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:42:55,273 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 [2020-12-17 20:42:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:55,274 INFO L763 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 [2020-12-17 20:42:55,274 INFO L78 Accepts]: Start accepts. Automaton has 108555 states and 317319 transitions. Word has length 71 [2020-12-17 20:42:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:55,274 INFO L481 AbstractCegarLoop]: Abstraction has 108555 states and 317319 transitions. [2020-12-17 20:42:55,275 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) [2020-12-17 20:42:55,275 INFO L276 IsEmpty]: Start isEmpty. Operand 108555 states and 317319 transitions. [2020-12-17 20:42:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:42:55,410 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:55,410 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] [2020-12-17 20:42:55,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:55,625 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1410682108, now seen corresponding path program 42 times [2020-12-17 20:42:55,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:55,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597631060] [2020-12-17 20:42:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:55,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597631060] [2020-12-17 20:42:55,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922886473] [2020-12-17 20:42:55,827 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 [2020-12-17 20:42:55,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-17 20:42:55,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:42:55,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:55,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:55,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:55,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:55,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:42:55,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753290076] [2020-12-17 20:42:55,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:42:55,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:55,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:42:55,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:42:55,976 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) [2020-12-17 20:42:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:58,139 INFO L93 Difference]: Finished difference Result 108811 states and 318023 transitions. [2020-12-17 20:42:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-17 20:42:58,140 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 [2020-12-17 20:42:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:58,140 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-12-17 20:42:58,140 INFO L78 Accepts]: Start accepts. Automaton has 108811 states and 318023 transitions. Word has length 71 [2020-12-17 20:42:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:58,141 INFO L481 AbstractCegarLoop]: Abstraction has 108811 states and 318023 transitions. [2020-12-17 20:42:58,141 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) [2020-12-17 20:42:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 108811 states and 318023 transitions. [2020-12-17 20:42:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:42:58,262 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:58,262 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] [2020-12-17 20:42:58,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-17 20:42:58,463 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:58,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1682215820, now seen corresponding path program 43 times [2020-12-17 20:42:58,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:58,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902098376] [2020-12-17 20:42:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:58,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902098376] [2020-12-17 20:42:58,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852535317] [2020-12-17 20:42:58,720 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 [2020-12-17 20:42:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:42:58,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:58,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:58,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:58,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-17 20:42:58,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374798179] [2020-12-17 20:42:58,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:42:58,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:58,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:42:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:42:58,864 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) [2020-12-17 20:42:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:59,946 INFO L93 Difference]: Finished difference Result 111435 states and 325767 transitions. [2020-12-17 20:42:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-17 20:42:59,947 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 [2020-12-17 20:42:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:59,948 INFO L763 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 [2020-12-17 20:42:59,948 INFO L78 Accepts]: Start accepts. Automaton has 111435 states and 325767 transitions. Word has length 76 [2020-12-17 20:42:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:59,948 INFO L481 AbstractCegarLoop]: Abstraction has 111435 states and 325767 transitions. [2020-12-17 20:42:59,949 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) [2020-12-17 20:42:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 111435 states and 325767 transitions. [2020-12-17 20:43:00,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:00,071 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:00,071 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] [2020-12-17 20:43:00,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:00,276 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:00,276 INFO L82 PathProgramCache]: Analyzing trace with hash 247870558, now seen corresponding path program 44 times [2020-12-17 20:43:00,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:00,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135139939] [2020-12-17 20:43:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:01,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135139939] [2020-12-17 20:43:01,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816515748] [2020-12-17 20:43:01,128 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 [2020-12-17 20:43:01,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:43:01,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:01,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:01,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:01,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:01,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:01,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:43:01,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534604486] [2020-12-17 20:43:01,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:43:01,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:01,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:43:01,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:43:01,285 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) [2020-12-17 20:43:02,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:02,824 INFO L93 Difference]: Finished difference Result 113419 states and 331591 transitions. [2020-12-17 20:43:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:43:02,825 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 [2020-12-17 20:43:02,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:02,826 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2020-12-17 20:43:02,826 INFO L78 Accepts]: Start accepts. Automaton has 113419 states and 331591 transitions. Word has length 76 [2020-12-17 20:43:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:02,826 INFO L481 AbstractCegarLoop]: Abstraction has 113419 states and 331591 transitions. [2020-12-17 20:43:02,826 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) [2020-12-17 20:43:02,826 INFO L276 IsEmpty]: Start isEmpty. Operand 113419 states and 331591 transitions. [2020-12-17 20:43:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:02,967 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:02,967 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] [2020-12-17 20:43:03,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:03,168 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:03,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2074066552, now seen corresponding path program 45 times [2020-12-17 20:43:03,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:03,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507751795] [2020-12-17 20:43:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:03,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507751795] [2020-12-17 20:43:03,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847272400] [2020-12-17 20:43:03,427 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 [2020-12-17 20:43:03,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-17 20:43:03,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:03,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:03,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:03,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:03,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:03,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-17 20:43:03,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125547575] [2020-12-17 20:43:03,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:43:03,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:03,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:43:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:03,560 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) [2020-12-17 20:43:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:05,250 INFO L93 Difference]: Finished difference Result 115531 states and 337799 transitions. [2020-12-17 20:43:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:43:05,251 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 [2020-12-17 20:43:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:05,252 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=431, Invalid=1129, Unknown=0, NotChecked=0, Total=1560 [2020-12-17 20:43:05,252 INFO L78 Accepts]: Start accepts. Automaton has 115531 states and 337799 transitions. Word has length 76 [2020-12-17 20:43:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:05,252 INFO L481 AbstractCegarLoop]: Abstraction has 115531 states and 337799 transitions. [2020-12-17 20:43:05,253 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) [2020-12-17 20:43:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 115531 states and 337799 transitions. [2020-12-17 20:43:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:05,368 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:05,368 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] [2020-12-17 20:43:05,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-17 20:43:05,569 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:05,570 INFO L82 PathProgramCache]: Analyzing trace with hash -59228856, now seen corresponding path program 46 times [2020-12-17 20:43:05,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:05,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229439086] [2020-12-17 20:43:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:05,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229439086] [2020-12-17 20:43:05,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862602567] [2020-12-17 20:43:05,820 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 [2020-12-17 20:43:05,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:43:05,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:43:05,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:05,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:05,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:05,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:05,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:43:05,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375811307] [2020-12-17 20:43:05,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:43:05,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:43:05,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:43:05,966 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) [2020-12-17 20:43:07,574 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-17 20:43:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:07,988 INFO L93 Difference]: Finished difference Result 117259 states and 342855 transitions. [2020-12-17 20:43:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:43:07,989 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 [2020-12-17 20:43:07,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:07,990 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=534, Invalid=1446, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:43:07,990 INFO L78 Accepts]: Start accepts. Automaton has 117259 states and 342855 transitions. Word has length 76 [2020-12-17 20:43:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:07,990 INFO L481 AbstractCegarLoop]: Abstraction has 117259 states and 342855 transitions. [2020-12-17 20:43:07,990 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) [2020-12-17 20:43:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 117259 states and 342855 transitions. [2020-12-17 20:43:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:08,107 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:08,107 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] [2020-12-17 20:43:08,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:08,308 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1831372022, now seen corresponding path program 47 times [2020-12-17 20:43:08,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:08,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910623169] [2020-12-17 20:43:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:08,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910623169] [2020-12-17 20:43:08,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812720777] [2020-12-17 20:43:08,529 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 [2020-12-17 20:43:08,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-17 20:43:08,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:08,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:08,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:08,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-17 20:43:08,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265527872] [2020-12-17 20:43:08,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:43:08,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:08,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:43:08,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:08,645 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) [2020-12-17 20:43:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:10,610 INFO L93 Difference]: Finished difference Result 119115 states and 348295 transitions. [2020-12-17 20:43:10,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:43:10,610 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 [2020-12-17 20:43:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:10,611 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=474, Invalid=1248, Unknown=0, NotChecked=0, Total=1722 [2020-12-17 20:43:10,611 INFO L78 Accepts]: Start accepts. Automaton has 119115 states and 348295 transitions. Word has length 76 [2020-12-17 20:43:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:10,612 INFO L481 AbstractCegarLoop]: Abstraction has 119115 states and 348295 transitions. [2020-12-17 20:43:10,612 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) [2020-12-17 20:43:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 119115 states and 348295 transitions. [2020-12-17 20:43:10,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:10,727 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:10,727 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] [2020-12-17 20:43:10,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-17 20:43:10,928 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:10,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1241888826, now seen corresponding path program 48 times [2020-12-17 20:43:10,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:10,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037256704] [2020-12-17 20:43:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:11,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037256704] [2020-12-17 20:43:11,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263198810] [2020-12-17 20:43:11,165 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 [2020-12-17 20:43:11,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-17 20:43:11,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:11,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:11,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:11,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:11,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:11,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:11,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:43:11,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552024544] [2020-12-17 20:43:11,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:43:11,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:11,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:43:11,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:43:11,382 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) [2020-12-17 20:43:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:13,169 INFO L93 Difference]: Finished difference Result 120843 states and 353351 transitions. [2020-12-17 20:43:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:43:13,170 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 [2020-12-17 20:43:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:13,171 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=585, Invalid=1577, Unknown=0, NotChecked=0, Total=2162 [2020-12-17 20:43:13,171 INFO L78 Accepts]: Start accepts. Automaton has 120843 states and 353351 transitions. Word has length 76 [2020-12-17 20:43:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:13,171 INFO L481 AbstractCegarLoop]: Abstraction has 120843 states and 353351 transitions. [2020-12-17 20:43:13,172 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) [2020-12-17 20:43:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 120843 states and 353351 transitions. [2020-12-17 20:43:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:13,931 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:13,931 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] [2020-12-17 20:43:14,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-17 20:43:14,132 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1963045108, now seen corresponding path program 49 times [2020-12-17 20:43:14,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:14,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800757578] [2020-12-17 20:43:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:14,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800757578] [2020-12-17 20:43:14,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725398848] [2020-12-17 20:43:14,374 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 [2020-12-17 20:43:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:14,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:14,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:14,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:14,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-17 20:43:14,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680931561] [2020-12-17 20:43:14,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:43:14,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:14,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:43:14,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:14,494 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) [2020-12-17 20:43:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:16,146 INFO L93 Difference]: Finished difference Result 122699 states and 358791 transitions. [2020-12-17 20:43:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:43:16,147 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 [2020-12-17 20:43:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:16,147 INFO L763 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 [2020-12-17 20:43:16,147 INFO L78 Accepts]: Start accepts. Automaton has 122699 states and 358791 transitions. Word has length 76 [2020-12-17 20:43:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:16,147 INFO L481 AbstractCegarLoop]: Abstraction has 122699 states and 358791 transitions. [2020-12-17 20:43:16,148 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) [2020-12-17 20:43:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 122699 states and 358791 transitions. [2020-12-17 20:43:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:16,269 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:16,269 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] [2020-12-17 20:43:16,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-17 20:43:16,470 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1412319292, now seen corresponding path program 50 times [2020-12-17 20:43:16,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:16,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142027143] [2020-12-17 20:43:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:16,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142027143] [2020-12-17 20:43:16,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676651887] [2020-12-17 20:43:16,703 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 [2020-12-17 20:43:16,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:43:16,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:16,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:16,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:16,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:16,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:16,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:16,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:43:16,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602568283] [2020-12-17 20:43:16,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:43:16,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:43:16,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:43:16,855 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) [2020-12-17 20:43:17,604 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2020-12-17 20:43:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:19,382 INFO L93 Difference]: Finished difference Result 124811 states and 364935 transitions. [2020-12-17 20:43:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-17 20:43:19,383 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 [2020-12-17 20:43:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:19,384 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2020-12-17 20:43:19,384 INFO L78 Accepts]: Start accepts. Automaton has 124811 states and 364935 transitions. Word has length 76 [2020-12-17 20:43:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:19,384 INFO L481 AbstractCegarLoop]: Abstraction has 124811 states and 364935 transitions. [2020-12-17 20:43:19,384 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) [2020-12-17 20:43:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 124811 states and 364935 transitions. [2020-12-17 20:43:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:19,509 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:19,509 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] [2020-12-17 20:43:19,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-17 20:43:19,710 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:19,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:19,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1060243374, now seen corresponding path program 51 times [2020-12-17 20:43:19,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:19,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650012545] [2020-12-17 20:43:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:19,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650012545] [2020-12-17 20:43:19,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987392901] [2020-12-17 20:43:19,923 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 [2020-12-17 20:43:20,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-17 20:43:20,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:20,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:20,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:20,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:20,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:20,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-17 20:43:20,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828736864] [2020-12-17 20:43:20,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:43:20,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:20,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:43:20,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:20,034 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) [2020-12-17 20:43:21,195 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-17 20:43:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:22,099 INFO L93 Difference]: Finished difference Result 127947 states and 374151 transitions. [2020-12-17 20:43:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:43:22,099 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 [2020-12-17 20:43:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:22,100 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=620, Invalid=1450, Unknown=0, NotChecked=0, Total=2070 [2020-12-17 20:43:22,100 INFO L78 Accepts]: Start accepts. Automaton has 127947 states and 374151 transitions. Word has length 76 [2020-12-17 20:43:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:22,100 INFO L481 AbstractCegarLoop]: Abstraction has 127947 states and 374151 transitions. [2020-12-17 20:43:22,101 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) [2020-12-17 20:43:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 127947 states and 374151 transitions. [2020-12-17 20:43:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:22,220 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:22,220 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] [2020-12-17 20:43:22,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:22,422 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:22,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1063216604, now seen corresponding path program 52 times [2020-12-17 20:43:22,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:22,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379351874] [2020-12-17 20:43:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:22,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379351874] [2020-12-17 20:43:22,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359187893] [2020-12-17 20:43:22,651 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 [2020-12-17 20:43:22,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:43:22,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:22,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:43:22,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:22,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:22,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:22,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:22,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:43:22,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912109934] [2020-12-17 20:43:22,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:43:22,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:22,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:43:22,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:43:22,805 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) [2020-12-17 20:43:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:25,228 INFO L93 Difference]: Finished difference Result 128587 states and 375943 transitions. [2020-12-17 20:43:25,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-17 20:43:25,229 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 [2020-12-17 20:43:25,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:25,230 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=698, Invalid=1654, Unknown=0, NotChecked=0, Total=2352 [2020-12-17 20:43:25,230 INFO L78 Accepts]: Start accepts. Automaton has 128587 states and 375943 transitions. Word has length 76 [2020-12-17 20:43:25,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:25,230 INFO L481 AbstractCegarLoop]: Abstraction has 128587 states and 375943 transitions. [2020-12-17 20:43:25,230 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) [2020-12-17 20:43:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 128587 states and 375943 transitions. [2020-12-17 20:43:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:43:25,381 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:25,386 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] [2020-12-17 20:43:25,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:25,594 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:25,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2102535418, now seen corresponding path program 53 times [2020-12-17 20:43:25,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:25,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468763081] [2020-12-17 20:43:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-17 20:43:25,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468763081] [2020-12-17 20:43:25,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330256480] [2020-12-17 20:43:25,755 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 [2020-12-17 20:43:25,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-17 20:43:25,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:25,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:43:25,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-17 20:43:25,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-17 20:43:25,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-12-17 20:43:25,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943212881] [2020-12-17 20:43:25,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:43:25,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:25,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:43:25,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:25,909 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) [2020-12-17 20:43:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:27,931 INFO L93 Difference]: Finished difference Result 205678 states and 606982 transitions. [2020-12-17 20:43:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-17 20:43:27,932 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 [2020-12-17 20:43:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:27,933 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2020-12-17 20:43:27,933 INFO L78 Accepts]: Start accepts. Automaton has 205678 states and 606982 transitions. Word has length 81 [2020-12-17 20:43:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:27,933 INFO L481 AbstractCegarLoop]: Abstraction has 205678 states and 606982 transitions. [2020-12-17 20:43:27,933 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) [2020-12-17 20:43:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 205678 states and 606982 transitions. [2020-12-17 20:43:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:43:28,261 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:28,261 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] [2020-12-17 20:43:28,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:28,469 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:28,470 INFO L82 PathProgramCache]: Analyzing trace with hash -298810531, now seen corresponding path program 54 times [2020-12-17 20:43:28,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:28,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83559694] [2020-12-17 20:43:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:28,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83559694] [2020-12-17 20:43:28,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317135280] [2020-12-17 20:43:28,652 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 [2020-12-17 20:43:28,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-17 20:43:28,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:43:28,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:28,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-17 20:43:28,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-12-17 20:43:28,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648015198] [2020-12-17 20:43:28,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:43:28,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:43:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:28,811 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) [2020-12-17 20:43:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:31,684 INFO L93 Difference]: Finished difference Result 424333 states and 1285236 transitions. [2020-12-17 20:43:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-17 20:43:31,685 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 [2020-12-17 20:43:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:31,685 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2020-12-17 20:43:31,686 INFO L78 Accepts]: Start accepts. Automaton has 424333 states and 1285236 transitions. Word has length 81 [2020-12-17 20:43:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:31,686 INFO L481 AbstractCegarLoop]: Abstraction has 424333 states and 1285236 transitions. [2020-12-17 20:43:31,686 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) [2020-12-17 20:43:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 424333 states and 1285236 transitions. [2020-12-17 20:43:33,386 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-17 20:43:33,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-17 20:43:33,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 08:43:33 BasicIcfg [2020-12-17 20:43:33,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-17 20:43:33,596 INFO L168 Benchmark]: Toolchain (without parser) took 124044.16 ms. Allocated memory was 302.0 MB in the beginning and 14.5 GB in the end (delta: 14.2 GB). Free memory was 276.2 MB in the beginning and 9.3 GB in the end (delta: -9.0 GB). Peak memory consumption was 5.5 GB. Max. memory is 16.0 GB. [2020-12-17 20:43:33,597 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 302.0 MB. Free memory was 272.2 MB in the beginning and 272.2 MB in the end (delta: 78.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2020-12-17 20:43:33,597 INFO L168 Benchmark]: CACSL2BoogieTranslator took 823.00 ms. Allocated memory is still 302.0 MB. Free memory was 276.0 MB in the beginning and 273.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.0 GB. [2020-12-17 20:43:33,597 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.92 ms. Allocated memory is still 302.0 MB. Free memory was 273.9 MB in the beginning and 272.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-12-17 20:43:33,598 INFO L168 Benchmark]: Boogie Preprocessor took 48.44 ms. Allocated memory is still 302.0 MB. Free memory was 272.2 MB in the beginning and 270.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-12-17 20:43:33,598 INFO L168 Benchmark]: RCFGBuilder took 566.56 ms. Allocated memory is still 302.0 MB. Free memory was 270.5 MB in the beginning and 250.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2020-12-17 20:43:33,598 INFO L168 Benchmark]: TraceAbstraction took 122533.68 ms. Allocated memory was 302.0 MB in the beginning and 14.5 GB in the end (delta: 14.2 GB). Free memory was 250.0 MB in the beginning and 9.3 GB in the end (delta: -9.0 GB). Peak memory consumption was 5.5 GB. Max. memory is 16.0 GB. [2020-12-17 20:43:33,600 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 302.0 MB. Free memory was 272.2 MB in the beginning and 272.2 MB in the end (delta: 78.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 823.00 ms. Allocated memory is still 302.0 MB. Free memory was 276.0 MB in the beginning and 273.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 60.92 ms. Allocated memory is still 302.0 MB. Free memory was 273.9 MB in the beginning and 272.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 48.44 ms. Allocated memory is still 302.0 MB. Free memory was 272.2 MB in the beginning and 270.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 566.56 ms. Allocated memory is still 302.0 MB. Free memory was 270.5 MB in the beginning and 250.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 122533.68 ms. Allocated memory was 302.0 MB in the beginning and 14.5 GB in the end (delta: 14.2 GB). Free memory was 250.0 MB in the beginning and 9.3 GB in the end (delta: -9.0 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: 122.3s, OverallIterations: 64, TraceHistogramMax: 6, AutomataDifference: 76.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 8401 SDtfs, 58220 SDslu, 48000 SDs, 0 SdLazy, 8406 SolverSat, 3303 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5631 GetRequests, 3605 SyntacticMatches, 53 SemanticMatches, 1973 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18024 ImplicationChecksByTransitivity, 44.6s 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: 0.9s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 17.4s 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...