/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 21:29:24,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 21:29:24,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 21:29:24,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 21:29:24,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 21:29:24,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 21:29:24,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 21:29:24,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 21:29:24,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 21:29:24,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 21:29:24,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 21:29:24,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 21:29:24,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 21:29:24,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 21:29:24,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 21:29:24,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 21:29:24,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 21:29:24,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 21:29:24,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 21:29:24,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 21:29:24,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 21:29:24,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 21:29:24,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 21:29:24,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 21:29:24,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 21:29:24,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 21:29:24,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 21:29:24,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 21:29:24,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 21:29:24,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 21:29:24,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 21:29:24,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 21:29:24,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 21:29:24,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 21:29:24,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 21:29:24,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 21:29:24,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 21:29:24,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 21:29:24,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 21:29:24,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 21:29:24,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 21:29:24,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-21 21:29:24,874 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 21:29:24,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 21:29:24,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 21:29:24,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 21:29:24,876 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 21:29:24,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 21:29:24,876 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 21:29:24,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 21:29:24,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 21:29:24,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 21:29:24,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 21:29:24,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 21:29:24,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 21:29:24,881 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 21:29:24,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 21:29:24,881 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 21:29:24,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 21:29:24,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 21:29:24,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 21:29:24,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 21:29:24,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 21:29:24,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:29:24,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 21:29:24,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-21 21:29:24,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 21:29:24,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 21:29:24,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 21:29:24,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 21:29:24,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-21 21:29:24,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-21 21:29:25,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 21:29:25,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 21:29:25,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 21:29:25,224 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 21:29:25,225 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 21:29:25,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2020-10-21 21:29:25,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/570075710/5f70f07f96bb473db4d5f8d600632156/FLAG808ce82dc [2020-10-21 21:29:25,887 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 21:29:25,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2020-10-21 21:29:25,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/570075710/5f70f07f96bb473db4d5f8d600632156/FLAG808ce82dc [2020-10-21 21:29:26,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/570075710/5f70f07f96bb473db4d5f8d600632156 [2020-10-21 21:29:26,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 21:29:26,141 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 21:29:26,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 21:29:26,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 21:29:26,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 21:29:26,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad520e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26, skipping insertion in model container [2020-10-21 21:29:26,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 21:29:26,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 21:29:26,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:29:26,722 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 21:29:26,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:29:26,874 INFO L208 MainTranslator]: Completed translation [2020-10-21 21:29:26,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26 WrapperNode [2020-10-21 21:29:26,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 21:29:26,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 21:29:26,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 21:29:26,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 21:29:26,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 21:29:26,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 21:29:26,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 21:29:26,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 21:29:26,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 21:29:26,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 21:29:26,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 21:29:26,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 21:29:26,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (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 [2020-10-21 21:29:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 21:29:27,020 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 21:29:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 21:29:27,020 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 21:29:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 21:29:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 21:29:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 21:29:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 21:29:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 21:29:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 21:29:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 21:29:27,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 21:29:27,023 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 21:29:27,387 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 21:29:27,387 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 21:29:27,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:29:27 BoogieIcfgContainer [2020-10-21 21:29:27,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 21:29:27,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 21:29:27,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 21:29:27,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 21:29:27,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 09:29:26" (1/3) ... [2020-10-21 21:29:27,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ce78a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:29:27, skipping insertion in model container [2020-10-21 21:29:27,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26" (2/3) ... [2020-10-21 21:29:27,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ce78a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:29:27, skipping insertion in model container [2020-10-21 21:29:27,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:29:27" (3/3) ... [2020-10-21 21:29:27,399 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-10-21 21:29:27,411 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 21:29:27,412 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-21 21:29:27,420 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 21:29:27,421 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 21:29:27,450 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,450 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,451 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,451 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,452 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,452 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,452 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,453 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,453 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,453 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,454 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,454 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,454 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,455 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,455 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,455 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,456 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,457 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,457 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,457 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,459 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,459 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,460 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,463 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,464 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,464 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,464 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,465 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,465 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,471 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,471 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,472 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,472 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,472 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,472 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,475 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 21:29:27,489 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 21:29:27,511 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 21:29:27,512 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 21:29:27,512 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-21 21:29:27,512 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 21:29:27,512 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 21:29:27,512 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 21:29:27,513 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 21:29:27,513 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 21:29:27,526 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-21 21:29:27,530 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 21:29:27,533 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 21:29:27,535 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-10-21 21:29:27,581 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-21 21:29:27,581 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 21:29:27,587 INFO L80 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-10-21 21:29:27,590 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-10-21 21:29:28,794 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-21 21:29:29,235 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-21 21:29:29,370 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-21 21:29:29,426 INFO L131 LiptonReduction]: Checked pairs total: 1183 [2020-10-21 21:29:29,426 INFO L133 LiptonReduction]: Total number of compositions: 65 [2020-10-21 21:29:29,433 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 21:29:29,444 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 21:29:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 21:29:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 21:29:29,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:29,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 21:29:29,455 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:29,459 INFO L82 PathProgramCache]: Analyzing trace with hash -542844556, now seen corresponding path program 1 times [2020-10-21 21:29:29,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:29,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667162169] [2020-10-21 21:29:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:29,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667162169] [2020-10-21 21:29:29,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:29,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 21:29:29,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955268262] [2020-10-21 21:29:29,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 21:29:29,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:29,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 21:29:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 21:29:29,710 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 21:29:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:29,784 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-21 21:29:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 21:29:29,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 21:29:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:29,799 INFO L225 Difference]: With dead ends: 83 [2020-10-21 21:29:29,800 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 21:29:29,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:29:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 21:29:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-21 21:29:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-21 21:29:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-21 21:29:29,850 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-21 21:29:29,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:29,850 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-21 21:29:29,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 21:29:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-21 21:29:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 21:29:29,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:29,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:29,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 21:29:29,852 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:29,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:29,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1940739433, now seen corresponding path program 1 times [2020-10-21 21:29:29,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:29,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110775876] [2020-10-21 21:29:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:29,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110775876] [2020-10-21 21:29:29,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:29,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:29:29,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933835241] [2020-10-21 21:29:29,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 21:29:29,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:29,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 21:29:29,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:29:29,970 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-21 21:29:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:30,031 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-21 21:29:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:29:30,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 21:29:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:30,033 INFO L225 Difference]: With dead ends: 80 [2020-10-21 21:29:30,034 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 21:29:30,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 21:29:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 21:29:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-21 21:29:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 21:29:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-21 21:29:30,046 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-21 21:29:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:30,047 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-21 21:29:30,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 21:29:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-21 21:29:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 21:29:30,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:30,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:30,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 21:29:30,049 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1981941347, now seen corresponding path program 1 times [2020-10-21 21:29:30,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:30,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525669962] [2020-10-21 21:29:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525669962] [2020-10-21 21:29:30,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:30,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:29:30,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662334250] [2020-10-21 21:29:30,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 21:29:30,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:30,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 21:29:30,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:29:30,153 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-21 21:29:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:30,225 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-10-21 21:29:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:29:30,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 21:29:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:30,227 INFO L225 Difference]: With dead ends: 83 [2020-10-21 21:29:30,227 INFO L226 Difference]: Without dead ends: 77 [2020-10-21 21:29:30,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 21:29:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-21 21:29:30,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-10-21 21:29:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 21:29:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-21 21:29:30,238 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-21 21:29:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:30,239 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-21 21:29:30,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 21:29:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-21 21:29:30,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 21:29:30,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:30,240 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:30,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 21:29:30,241 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash -33351122, now seen corresponding path program 2 times [2020-10-21 21:29:30,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:30,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881392324] [2020-10-21 21:29:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881392324] [2020-10-21 21:29:30,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910654658] [2020-10-21 21:29:30,371 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 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 [2020-10-21 21:29:30,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:30,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:30,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:29:30,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:30,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:30,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-21 21:29:30,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401305504] [2020-10-21 21:29:30,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:29:30,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:30,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:29:30,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:29:30,562 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-21 21:29:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:30,666 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-21 21:29:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:30,670 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-21 21:29:30,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:30,672 INFO L225 Difference]: With dead ends: 101 [2020-10-21 21:29:30,672 INFO L226 Difference]: Without dead ends: 96 [2020-10-21 21:29:30,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:29:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-21 21:29:30,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-21 21:29:30,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 21:29:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-21 21:29:30,696 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-21 21:29:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:30,696 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-21 21:29:30,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:29:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-21 21:29:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 21:29:30,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:30,698 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:30,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:30,903 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:30,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1310611417, now seen corresponding path program 2 times [2020-10-21 21:29:30,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:30,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651909774] [2020-10-21 21:29:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651909774] [2020-10-21 21:29:30,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599875449] [2020-10-21 21:29:30,972 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 [2020-10-21 21:29:31,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:31,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:31,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:29:31,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:31,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:31,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-21 21:29:31,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878937906] [2020-10-21 21:29:31,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 21:29:31,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:31,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 21:29:31,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:29:31,105 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-21 21:29:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:31,212 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 21:29:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:31,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-21 21:29:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:31,214 INFO L225 Difference]: With dead ends: 96 [2020-10-21 21:29:31,215 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 21:29:31,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:29:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 21:29:31,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-21 21:29:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 21:29:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-21 21:29:31,224 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-21 21:29:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:31,224 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-21 21:29:31,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 21:29:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-21 21:29:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:31,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:31,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:31,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:31,440 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1043120626, now seen corresponding path program 1 times [2020-10-21 21:29:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:31,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239269613] [2020-10-21 21:29:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239269613] [2020-10-21 21:29:31,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:31,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:29:31,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130930007] [2020-10-21 21:29:31,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:29:31,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:29:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:29:31,531 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-21 21:29:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:31,628 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 21:29:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:31,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:29:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:31,630 INFO L225 Difference]: With dead ends: 103 [2020-10-21 21:29:31,631 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 21:29:31,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:29:31,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 21:29:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-10-21 21:29:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-21 21:29:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-21 21:29:31,649 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 10 [2020-10-21 21:29:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:31,651 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-21 21:29:31,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:29:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-21 21:29:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:31,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:31,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:31,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-21 21:29:31,653 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:31,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1043091796, now seen corresponding path program 2 times [2020-10-21 21:29:31,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:31,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434954948] [2020-10-21 21:29:31,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434954948] [2020-10-21 21:29:31,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:31,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:29:31,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029636108] [2020-10-21 21:29:31,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:29:31,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:31,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:29:31,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:29:31,758 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 6 states. [2020-10-21 21:29:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:31,839 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 21:29:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:31,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:29:31,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:31,840 INFO L225 Difference]: With dead ends: 103 [2020-10-21 21:29:31,841 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 21:29:31,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:29:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 21:29:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-21 21:29:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 21:29:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-21 21:29:31,849 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-21 21:29:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:31,849 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-21 21:29:31,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:29:31,850 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-21 21:29:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:31,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:31,851 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:31,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-21 21:29:31,851 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1033855625, now seen corresponding path program 3 times [2020-10-21 21:29:31,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:31,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388025917] [2020-10-21 21:29:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388025917] [2020-10-21 21:29:31,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293792875] [2020-10-21 21:29:31,919 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 [2020-10-21 21:29:31,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:31,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:31,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:31,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:32,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:32,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-21 21:29:32,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575929235] [2020-10-21 21:29:32,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:29:32,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:32,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:29:32,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:29:32,078 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-21 21:29:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:32,185 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-21 21:29:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:32,186 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-21 21:29:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:32,187 INFO L225 Difference]: With dead ends: 122 [2020-10-21 21:29:32,187 INFO L226 Difference]: Without dead ends: 117 [2020-10-21 21:29:32,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:29:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-21 21:29:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-21 21:29:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 21:29:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-21 21:29:32,195 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-21 21:29:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:32,196 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-21 21:29:32,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:29:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-21 21:29:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:32,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:32,197 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:32,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:32,411 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:32,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1974220067, now seen corresponding path program 3 times [2020-10-21 21:29:32,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:32,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513071099] [2020-10-21 21:29:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513071099] [2020-10-21 21:29:32,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664067092] [2020-10-21 21:29:32,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:32,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:32,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:32,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:32,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:32,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:32,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285286895] [2020-10-21 21:29:32,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:32,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:32,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:32,639 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-21 21:29:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:32,782 INFO L93 Difference]: Finished difference Result 121 states and 288 transitions. [2020-10-21 21:29:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:32,783 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-21 21:29:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:32,784 INFO L225 Difference]: With dead ends: 121 [2020-10-21 21:29:32,784 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 21:29:32,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:29:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 21:29:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-10-21 21:29:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 21:29:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 21:29:32,799 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-21 21:29:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:32,804 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 21:29:32,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 21:29:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:32,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:32,806 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:33,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:33,007 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:33,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:33,008 INFO L82 PathProgramCache]: Analyzing trace with hash 2022998328, now seen corresponding path program 3 times [2020-10-21 21:29:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:33,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311405471] [2020-10-21 21:29:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:33,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311405471] [2020-10-21 21:29:33,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062581586] [2020-10-21 21:29:33,103 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 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 [2020-10-21 21:29:33,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:33,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:33,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:33,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:33,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:33,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:33,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:33,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172662798] [2020-10-21 21:29:33,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:33,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:33,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:33,314 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 21:29:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:33,504 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-10-21 21:29:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:33,505 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:33,506 INFO L225 Difference]: With dead ends: 121 [2020-10-21 21:29:33,506 INFO L226 Difference]: Without dead ends: 116 [2020-10-21 21:29:33,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-21 21:29:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2020-10-21 21:29:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 21:29:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 21:29:33,513 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 11 [2020-10-21 21:29:33,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:33,513 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 21:29:33,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 21:29:33,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:33,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:33,515 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:33,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 21:29:33,729 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:33,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2023027158, now seen corresponding path program 4 times [2020-10-21 21:29:33,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:33,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384206923] [2020-10-21 21:29:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:33,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384206923] [2020-10-21 21:29:33,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611856575] [2020-10-21 21:29:33,791 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 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 [2020-10-21 21:29:33,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:33,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:33,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:33,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:33,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:33,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:33,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:33,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562118087] [2020-10-21 21:29:33,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:33,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:33,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:33,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:33,921 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 21:29:34,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:34,136 INFO L93 Difference]: Finished difference Result 131 states and 313 transitions. [2020-10-21 21:29:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:29:34,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:34,138 INFO L225 Difference]: With dead ends: 131 [2020-10-21 21:29:34,139 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 21:29:34,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:29:34,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 21:29:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2020-10-21 21:29:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 21:29:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-10-21 21:29:34,148 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 11 [2020-10-21 21:29:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:34,149 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-10-21 21:29:34,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-10-21 21:29:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:34,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:34,150 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:34,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:34,351 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:34,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2023028119, now seen corresponding path program 5 times [2020-10-21 21:29:34,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:34,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583194110] [2020-10-21 21:29:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:34,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583194110] [2020-10-21 21:29:34,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77791449] [2020-10-21 21:29:34,413 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 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 [2020-10-21 21:29:34,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:34,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:34,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:34,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:34,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:34,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:34,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:34,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338917675] [2020-10-21 21:29:34,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:34,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:34,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:34,525 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 11 states. [2020-10-21 21:29:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:34,691 INFO L93 Difference]: Finished difference Result 126 states and 297 transitions. [2020-10-21 21:29:34,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:34,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:34,695 INFO L225 Difference]: With dead ends: 126 [2020-10-21 21:29:34,695 INFO L226 Difference]: Without dead ends: 121 [2020-10-21 21:29:34,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-21 21:29:34,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-10-21 21:29:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 21:29:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-10-21 21:29:34,701 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 11 [2020-10-21 21:29:34,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:34,701 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-10-21 21:29:34,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:34,701 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-10-21 21:29:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:34,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:34,702 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:34,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:34,917 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:34,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:34,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920888, now seen corresponding path program 6 times [2020-10-21 21:29:34,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:34,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382610827] [2020-10-21 21:29:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:34,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382610827] [2020-10-21 21:29:34,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77846031] [2020-10-21 21:29:34,977 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 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 [2020-10-21 21:29:35,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:29:35,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:35,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:35,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:35,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:35,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299079271] [2020-10-21 21:29:35,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:35,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:35,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:35,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:35,091 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 11 states. [2020-10-21 21:29:35,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:35,241 INFO L93 Difference]: Finished difference Result 127 states and 304 transitions. [2020-10-21 21:29:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:35,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:35,242 INFO L225 Difference]: With dead ends: 127 [2020-10-21 21:29:35,242 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 21:29:35,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 21:29:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2020-10-21 21:29:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 21:29:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 241 transitions. [2020-10-21 21:29:35,247 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 241 transitions. Word has length 11 [2020-10-21 21:29:35,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:35,248 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 241 transitions. [2020-10-21 21:29:35,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:35,248 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 241 transitions. [2020-10-21 21:29:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:35,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:35,249 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:35,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 21:29:35,450 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:35,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:35,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2023921849, now seen corresponding path program 7 times [2020-10-21 21:29:35,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:35,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694083414] [2020-10-21 21:29:35,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694083414] [2020-10-21 21:29:35,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769667919] [2020-10-21 21:29:35,520 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 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 [2020-10-21 21:29:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:35,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:35,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:35,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:35,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:35,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023331147] [2020-10-21 21:29:35,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:35,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:35,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:35,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:35,673 INFO L87 Difference]: Start difference. First operand 97 states and 241 transitions. Second operand 11 states. [2020-10-21 21:29:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:35,935 INFO L93 Difference]: Finished difference Result 141 states and 331 transitions. [2020-10-21 21:29:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:29:35,936 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:35,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:35,937 INFO L225 Difference]: With dead ends: 141 [2020-10-21 21:29:35,937 INFO L226 Difference]: Without dead ends: 136 [2020-10-21 21:29:35,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:29:35,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-21 21:29:35,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-10-21 21:29:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-21 21:29:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 236 transitions. [2020-10-21 21:29:35,944 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 236 transitions. Word has length 11 [2020-10-21 21:29:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:35,945 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 236 transitions. [2020-10-21 21:29:35,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 236 transitions. [2020-10-21 21:29:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:35,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:35,946 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:36,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:36,160 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2023950679, now seen corresponding path program 8 times [2020-10-21 21:29:36,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:36,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426420576] [2020-10-21 21:29:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:36,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426420576] [2020-10-21 21:29:36,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540947299] [2020-10-21 21:29:36,215 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 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 [2020-10-21 21:29:36,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:36,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:36,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:29:36,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:36,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:36,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-21 21:29:36,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825542506] [2020-10-21 21:29:36,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 21:29:36,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:36,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 21:29:36,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:29:36,307 INFO L87 Difference]: Start difference. First operand 96 states and 236 transitions. Second operand 9 states. [2020-10-21 21:29:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:36,467 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-21 21:29:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:36,467 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-10-21 21:29:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:36,469 INFO L225 Difference]: With dead ends: 131 [2020-10-21 21:29:36,469 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 21:29:36,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:29:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 21:29:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2020-10-21 21:29:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-21 21:29:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-21 21:29:36,474 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-21 21:29:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:36,474 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-21 21:29:36,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 21:29:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-21 21:29:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:36,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:36,475 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:36,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 21:29:36,685 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:36,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1984724146, now seen corresponding path program 4 times [2020-10-21 21:29:36,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:36,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546658614] [2020-10-21 21:29:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:36,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546658614] [2020-10-21 21:29:36,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340480249] [2020-10-21 21:29:36,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:36,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:36,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:36,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:36,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:36,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:36,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:36,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 21:29:36,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196063554] [2020-10-21 21:29:36,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:29:36,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:36,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:29:36,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:29:36,909 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-21 21:29:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:37,043 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-21 21:29:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:29:37,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-21 21:29:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:37,045 INFO L225 Difference]: With dead ends: 143 [2020-10-21 21:29:37,045 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 21:29:37,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-21 21:29:37,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 21:29:37,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-21 21:29:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 21:29:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 21:29:37,050 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-21 21:29:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:37,051 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 21:29:37,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:29:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 21:29:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:37,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:37,052 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:37,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 21:29:37,255 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:37,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1071251737, now seen corresponding path program 4 times [2020-10-21 21:29:37,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:37,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060331756] [2020-10-21 21:29:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:37,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060331756] [2020-10-21 21:29:37,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641778805] [2020-10-21 21:29:37,329 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 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 [2020-10-21 21:29:37,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:37,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:37,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:37,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:37,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:29:37,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472407953] [2020-10-21 21:29:37,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:29:37,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:37,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:29:37,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:29:37,472 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-21 21:29:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:37,635 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-10-21 21:29:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:29:37,636 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-21 21:29:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:37,637 INFO L225 Difference]: With dead ends: 147 [2020-10-21 21:29:37,637 INFO L226 Difference]: Without dead ends: 141 [2020-10-21 21:29:37,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:29:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-21 21:29:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-10-21 21:29:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 21:29:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-21 21:29:37,643 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-21 21:29:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:37,643 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-21 21:29:37,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:29:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-21 21:29:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:29:37,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:37,644 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:37,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 21:29:37,856 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:37,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:37,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1711561906, now seen corresponding path program 9 times [2020-10-21 21:29:37,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:37,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584827856] [2020-10-21 21:29:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:37,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584827856] [2020-10-21 21:29:37,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796469845] [2020-10-21 21:29:37,926 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 [2020-10-21 21:29:37,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:37,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:37,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:38,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:38,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:38,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:38,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:29:38,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937160900] [2020-10-21 21:29:38,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:29:38,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:29:38,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:29:38,138 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-21 21:29:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:38,428 INFO L93 Difference]: Finished difference Result 152 states and 363 transitions. [2020-10-21 21:29:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:29:38,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:29:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:38,430 INFO L225 Difference]: With dead ends: 152 [2020-10-21 21:29:38,430 INFO L226 Difference]: Without dead ends: 147 [2020-10-21 21:29:38,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:29:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-21 21:29:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2020-10-21 21:29:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 21:29:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2020-10-21 21:29:38,437 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 12 [2020-10-21 21:29:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:38,438 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2020-10-21 21:29:38,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:29:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2020-10-21 21:29:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:29:38,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:38,439 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:38,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 21:29:38,651 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:38,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:38,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1711533076, now seen corresponding path program 10 times [2020-10-21 21:29:38,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:38,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735323764] [2020-10-21 21:29:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:38,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735323764] [2020-10-21 21:29:38,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854693864] [2020-10-21 21:29:38,729 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 [2020-10-21 21:29:38,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:38,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:38,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:38,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:38,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:40,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:40,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 21:29:40,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443642554] [2020-10-21 21:29:40,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:29:40,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:40,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:29:40,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=125, Unknown=1, NotChecked=0, Total=182 [2020-10-21 21:29:40,003 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand 14 states. [2020-10-21 21:29:42,201 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-10-21 21:29:52,199 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-21 21:30:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:00,704 INFO L93 Difference]: Finished difference Result 168 states and 398 transitions. [2020-10-21 21:30:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-21 21:30:00,711 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-10-21 21:30:00,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:00,713 INFO L225 Difference]: With dead ends: 168 [2020-10-21 21:30:00,713 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 21:30:00,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=195, Invalid=403, Unknown=2, NotChecked=0, Total=600 [2020-10-21 21:30:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 21:30:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 112. [2020-10-21 21:30:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 21:30:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 279 transitions. [2020-10-21 21:30:00,719 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 279 transitions. Word has length 12 [2020-10-21 21:30:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:00,719 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 279 transitions. [2020-10-21 21:30:00,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:30:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 279 transitions. [2020-10-21 21:30:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:00,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:00,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:00,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:00,933 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:00,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1711532115, now seen corresponding path program 11 times [2020-10-21 21:30:00,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:00,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788797821] [2020-10-21 21:30:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:01,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788797821] [2020-10-21 21:30:01,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208045019] [2020-10-21 21:30:01,002 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 [2020-10-21 21:30:01,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:01,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:01,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:01,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:01,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:01,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:01,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:01,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947312646] [2020-10-21 21:30:01,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:01,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:01,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:01,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:01,163 INFO L87 Difference]: Start difference. First operand 112 states and 279 transitions. Second operand 13 states. [2020-10-21 21:30:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:01,461 INFO L93 Difference]: Finished difference Result 148 states and 355 transitions. [2020-10-21 21:30:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:30:01,462 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:01,463 INFO L225 Difference]: With dead ends: 148 [2020-10-21 21:30:01,463 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 21:30:01,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:30:01,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 21:30:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-10-21 21:30:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-21 21:30:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 274 transitions. [2020-10-21 21:30:01,471 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 274 transitions. Word has length 12 [2020-10-21 21:30:01,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:01,471 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 274 transitions. [2020-10-21 21:30:01,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:01,471 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 274 transitions. [2020-10-21 21:30:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:01,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:01,475 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:01,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:01,677 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1710639346, now seen corresponding path program 12 times [2020-10-21 21:30:01,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:01,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218476391] [2020-10-21 21:30:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:01,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218476391] [2020-10-21 21:30:01,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736566676] [2020-10-21 21:30:01,742 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 [2020-10-21 21:30:01,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:30:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:01,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:01,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:01,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:01,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285632284] [2020-10-21 21:30:01,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:01,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:01,881 INFO L87 Difference]: Start difference. First operand 111 states and 274 transitions. Second operand 13 states. [2020-10-21 21:30:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:02,230 INFO L93 Difference]: Finished difference Result 167 states and 399 transitions. [2020-10-21 21:30:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:02,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:02,231 INFO L225 Difference]: With dead ends: 167 [2020-10-21 21:30:02,231 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 21:30:02,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 21:30:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 21:30:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-10-21 21:30:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 21:30:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2020-10-21 21:30:02,237 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 12 [2020-10-21 21:30:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:02,237 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2020-10-21 21:30:02,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2020-10-21 21:30:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:02,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:02,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:02,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:02,449 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1710638385, now seen corresponding path program 13 times [2020-10-21 21:30:02,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:02,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031062069] [2020-10-21 21:30:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:02,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031062069] [2020-10-21 21:30:02,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272069428] [2020-10-21 21:30:02,518 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 [2020-10-21 21:30:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:02,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:02,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:02,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:02,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:02,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791349959] [2020-10-21 21:30:02,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:02,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:02,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:02,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:02,650 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand 13 states. [2020-10-21 21:30:03,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:03,021 INFO L93 Difference]: Finished difference Result 177 states and 423 transitions. [2020-10-21 21:30:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:03,022 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:03,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:03,023 INFO L225 Difference]: With dead ends: 177 [2020-10-21 21:30:03,023 INFO L226 Difference]: Without dead ends: 169 [2020-10-21 21:30:03,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:30:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-21 21:30:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2020-10-21 21:30:03,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 21:30:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 283 transitions. [2020-10-21 21:30:03,029 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 283 transitions. Word has length 12 [2020-10-21 21:30:03,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:03,029 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 283 transitions. [2020-10-21 21:30:03,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 283 transitions. [2020-10-21 21:30:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:03,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:03,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:03,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 21:30:03,244 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1710609555, now seen corresponding path program 14 times [2020-10-21 21:30:03,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:03,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840343373] [2020-10-21 21:30:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:03,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840343373] [2020-10-21 21:30:03,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048535573] [2020-10-21 21:30:03,340 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 [2020-10-21 21:30:03,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:03,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:03,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:03,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:03,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:03,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:03,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501906926] [2020-10-21 21:30:03,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:03,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:03,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:03,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:03,518 INFO L87 Difference]: Start difference. First operand 114 states and 283 transitions. Second operand 13 states. [2020-10-21 21:30:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:03,893 INFO L93 Difference]: Finished difference Result 165 states and 395 transitions. [2020-10-21 21:30:03,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:03,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:03,895 INFO L225 Difference]: With dead ends: 165 [2020-10-21 21:30:03,896 INFO L226 Difference]: Without dead ends: 160 [2020-10-21 21:30:03,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:03,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-21 21:30:03,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-10-21 21:30:03,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 21:30:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-21 21:30:03,901 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 12 [2020-10-21 21:30:03,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:03,901 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-21 21:30:03,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-21 21:30:03,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:03,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:03,902 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:04,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 21:30:04,114 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1682933716, now seen corresponding path program 15 times [2020-10-21 21:30:04,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:04,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784183502] [2020-10-21 21:30:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:04,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784183502] [2020-10-21 21:30:04,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224281708] [2020-10-21 21:30:04,192 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 [2020-10-21 21:30:04,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:30:04,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:04,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:04,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:04,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:04,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:04,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:04,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213954612] [2020-10-21 21:30:04,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:04,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:04,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:04,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:04,323 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-21 21:30:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:04,540 INFO L93 Difference]: Finished difference Result 158 states and 378 transitions. [2020-10-21 21:30:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:30:04,540 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:04,542 INFO L225 Difference]: With dead ends: 158 [2020-10-21 21:30:04,542 INFO L226 Difference]: Without dead ends: 153 [2020-10-21 21:30:04,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:30:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-21 21:30:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2020-10-21 21:30:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-21 21:30:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 291 transitions. [2020-10-21 21:30:04,547 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 291 transitions. Word has length 12 [2020-10-21 21:30:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:04,547 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 291 transitions. [2020-10-21 21:30:04,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 291 transitions. [2020-10-21 21:30:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:04,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:04,549 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:04,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 21:30:04,750 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:04,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1682932755, now seen corresponding path program 16 times [2020-10-21 21:30:04,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:04,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229594671] [2020-10-21 21:30:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:04,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229594671] [2020-10-21 21:30:04,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246365031] [2020-10-21 21:30:04,844 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 [2020-10-21 21:30:04,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:30:04,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:04,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:05,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:05,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:05,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:05,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311549127] [2020-10-21 21:30:05,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:05,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:05,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:05,051 INFO L87 Difference]: Start difference. First operand 116 states and 291 transitions. Second operand 13 states. [2020-10-21 21:30:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:05,474 INFO L93 Difference]: Finished difference Result 185 states and 436 transitions. [2020-10-21 21:30:05,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:05,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:05,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:05,476 INFO L225 Difference]: With dead ends: 185 [2020-10-21 21:30:05,476 INFO L226 Difference]: Without dead ends: 177 [2020-10-21 21:30:05,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-21 21:30:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 115. [2020-10-21 21:30:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-21 21:30:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 286 transitions. [2020-10-21 21:30:05,481 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 286 transitions. Word has length 12 [2020-10-21 21:30:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:05,482 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 286 transitions. [2020-10-21 21:30:05,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 286 transitions. [2020-10-21 21:30:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:05,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:05,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:05,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 21:30:05,684 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:05,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1682903925, now seen corresponding path program 17 times [2020-10-21 21:30:05,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:05,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532225570] [2020-10-21 21:30:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:05,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532225570] [2020-10-21 21:30:05,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87074912] [2020-10-21 21:30:05,748 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 [2020-10-21 21:30:05,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:05,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:05,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:05,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:05,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:05,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:05,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:05,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891499196] [2020-10-21 21:30:05,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:05,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:05,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:05,872 INFO L87 Difference]: Start difference. First operand 115 states and 286 transitions. Second operand 13 states. [2020-10-21 21:30:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:06,279 INFO L93 Difference]: Finished difference Result 194 states and 459 transitions. [2020-10-21 21:30:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:06,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:06,281 INFO L225 Difference]: With dead ends: 194 [2020-10-21 21:30:06,281 INFO L226 Difference]: Without dead ends: 186 [2020-10-21 21:30:06,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:30:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-21 21:30:06,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 117. [2020-10-21 21:30:06,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-21 21:30:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-10-21 21:30:06,287 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 12 [2020-10-21 21:30:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:06,287 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-10-21 21:30:06,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-10-21 21:30:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:06,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:06,288 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:06,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 21:30:06,499 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:06,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1682902964, now seen corresponding path program 18 times [2020-10-21 21:30:06,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:06,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262676662] [2020-10-21 21:30:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:06,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262676662] [2020-10-21 21:30:06,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345184739] [2020-10-21 21:30:06,563 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 [2020-10-21 21:30:06,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:30:06,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:06,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:06,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:06,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:06,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526446241] [2020-10-21 21:30:06,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:06,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:06,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:06,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:06,696 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 13 states. [2020-10-21 21:30:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:07,021 INFO L93 Difference]: Finished difference Result 172 states and 404 transitions. [2020-10-21 21:30:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:07,022 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:07,023 INFO L225 Difference]: With dead ends: 172 [2020-10-21 21:30:07,024 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 21:30:07,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 21:30:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 21:30:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-10-21 21:30:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 21:30:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-21 21:30:07,029 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-21 21:30:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:07,029 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-21 21:30:07,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-21 21:30:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:07,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:07,030 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:07,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:07,244 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:07,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1396877225, now seen corresponding path program 5 times [2020-10-21 21:30:07,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:07,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657224854] [2020-10-21 21:30:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:07,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657224854] [2020-10-21 21:30:07,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391830382] [2020-10-21 21:30:07,345 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 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 [2020-10-21 21:30:07,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:30:07,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:07,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:07,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:07,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:07,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:30:07,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241129242] [2020-10-21 21:30:07,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:30:07,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:07,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:30:07,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:30:07,530 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-21 21:30:07,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:07,687 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-21 21:30:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:07,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-21 21:30:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:07,689 INFO L225 Difference]: With dead ends: 164 [2020-10-21 21:30:07,689 INFO L226 Difference]: Without dead ends: 159 [2020-10-21 21:30:07,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-21 21:30:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-21 21:30:07,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-21 21:30:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-21 21:30:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-21 21:30:07,694 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-21 21:30:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:07,694 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-21 21:30:07,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:30:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-21 21:30:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:07,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:07,695 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:07,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 21:30:07,896 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:07,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1150962717, now seen corresponding path program 5 times [2020-10-21 21:30:07,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:07,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547603649] [2020-10-21 21:30:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:07,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547603649] [2020-10-21 21:30:07,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484504340] [2020-10-21 21:30:07,975 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 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 [2020-10-21 21:30:08,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:30:08,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:08,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:08,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:08,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:08,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:08,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:08,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904262521] [2020-10-21 21:30:08,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:08,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:08,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:08,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:08,139 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-21 21:30:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:08,314 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-10-21 21:30:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:08,314 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-21 21:30:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:08,316 INFO L225 Difference]: With dead ends: 173 [2020-10-21 21:30:08,316 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 21:30:08,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:30:08,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 21:30:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2020-10-21 21:30:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:30:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 21:30:08,324 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-21 21:30:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:08,324 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 21:30:08,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 21:30:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:08,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:08,325 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:08,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 21:30:08,538 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:08,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1518812168, now seen corresponding path program 19 times [2020-10-21 21:30:08,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:08,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901100324] [2020-10-21 21:30:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:08,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901100324] [2020-10-21 21:30:08,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425546616] [2020-10-21 21:30:08,627 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 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 [2020-10-21 21:30:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:08,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:08,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:08,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:08,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:08,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:08,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598472414] [2020-10-21 21:30:08,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:08,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:08,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:08,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:08,825 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 21:30:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:09,114 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-10-21 21:30:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:09,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:30:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:09,116 INFO L225 Difference]: With dead ends: 183 [2020-10-21 21:30:09,116 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 21:30:09,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 21:30:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-10-21 21:30:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 21:30:09,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 21:30:09,122 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 21:30:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:09,122 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 21:30:09,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 21:30:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:09,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:09,123 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:09,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:09,335 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:09,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1518783338, now seen corresponding path program 20 times [2020-10-21 21:30:09,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:09,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183450748] [2020-10-21 21:30:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:09,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183450748] [2020-10-21 21:30:09,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90192140] [2020-10-21 21:30:09,413 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 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 [2020-10-21 21:30:09,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:09,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:09,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:09,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:09,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:10,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:10,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:30:10,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910873124] [2020-10-21 21:30:10,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:30:10,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:30:10,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=166, Unknown=1, NotChecked=0, Total=240 [2020-10-21 21:30:10,701 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 16 states. [2020-10-21 21:30:14,895 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-21 21:30:17,126 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-21 21:30:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:33,100 INFO L93 Difference]: Finished difference Result 212 states and 502 transitions. [2020-10-21 21:30:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:33,107 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 21:30:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:33,108 INFO L225 Difference]: With dead ends: 212 [2020-10-21 21:30:33,108 INFO L226 Difference]: Without dead ends: 207 [2020-10-21 21:30:33,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=274, Invalid=593, Unknown=3, NotChecked=0, Total=870 [2020-10-21 21:30:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-21 21:30:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 131. [2020-10-21 21:30:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 21:30:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2020-10-21 21:30:33,114 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 13 [2020-10-21 21:30:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:33,114 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2020-10-21 21:30:33,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:30:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2020-10-21 21:30:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:33,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:33,115 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:33,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:33,327 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:33,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1518782377, now seen corresponding path program 21 times [2020-10-21 21:30:33,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:33,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649798767] [2020-10-21 21:30:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:33,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649798767] [2020-10-21 21:30:33,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705719588] [2020-10-21 21:30:33,417 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 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 [2020-10-21 21:30:33,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:30:33,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:33,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:33,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:33,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:33,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011985386] [2020-10-21 21:30:33,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:33,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:33,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:33,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:33,591 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand 15 states. [2020-10-21 21:30:33,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:33,922 INFO L93 Difference]: Finished difference Result 184 states and 441 transitions. [2020-10-21 21:30:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:33,923 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:30:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:33,925 INFO L225 Difference]: With dead ends: 184 [2020-10-21 21:30:33,925 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 21:30:33,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 21:30:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2020-10-21 21:30:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 21:30:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 319 transitions. [2020-10-21 21:30:33,930 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 319 transitions. Word has length 13 [2020-10-21 21:30:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:33,930 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 319 transitions. [2020-10-21 21:30:33,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 319 transitions. [2020-10-21 21:30:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:33,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:33,931 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:34,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 21:30:34,143 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:34,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:34,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1517889608, now seen corresponding path program 22 times [2020-10-21 21:30:34,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:34,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932749428] [2020-10-21 21:30:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:34,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932749428] [2020-10-21 21:30:34,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050540321] [2020-10-21 21:30:34,220 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 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 [2020-10-21 21:30:34,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:30:34,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:34,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:34,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:34,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:34,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:34,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:34,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032500252] [2020-10-21 21:30:34,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:34,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:34,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:34,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:34,483 INFO L87 Difference]: Start difference. First operand 129 states and 319 transitions. Second operand 15 states. [2020-10-21 21:30:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:35,013 INFO L93 Difference]: Finished difference Result 207 states and 492 transitions. [2020-10-21 21:30:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:35,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:30:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:35,016 INFO L225 Difference]: With dead ends: 207 [2020-10-21 21:30:35,016 INFO L226 Difference]: Without dead ends: 202 [2020-10-21 21:30:35,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:30:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-21 21:30:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2020-10-21 21:30:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:30:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 21:30:35,022 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 21:30:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:35,022 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 21:30:35,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 21:30:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:35,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:35,023 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:35,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:35,235 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:35,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1517888647, now seen corresponding path program 23 times [2020-10-21 21:30:35,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:35,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971434641] [2020-10-21 21:30:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:35,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971434641] [2020-10-21 21:30:35,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966721528] [2020-10-21 21:30:35,319 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 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 [2020-10-21 21:30:35,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:35,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:35,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:35,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:39,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:45,786 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 43 DAG size of output: 20 [2020-10-21 21:30:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:45,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:45,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:30:45,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054289112] [2020-10-21 21:30:45,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:30:45,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:45,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:30:45,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=167, Unknown=3, NotChecked=0, Total=240 [2020-10-21 21:30:45,788 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 16 states. [2020-10-21 21:30:49,933 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-21 21:30:54,169 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-21 21:31:06,899 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-10-21 21:31:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:43,762 INFO L93 Difference]: Finished difference Result 225 states and 545 transitions. [2020-10-21 21:31:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:31:43,798 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 21:31:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:43,799 INFO L225 Difference]: With dead ends: 225 [2020-10-21 21:31:43,799 INFO L226 Difference]: Without dead ends: 221 [2020-10-21 21:31:43,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=318, Invalid=731, Unknown=7, NotChecked=0, Total=1056 [2020-10-21 21:31:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-21 21:31:43,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 146. [2020-10-21 21:31:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-21 21:31:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 372 transitions. [2020-10-21 21:31:43,803 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 372 transitions. Word has length 13 [2020-10-21 21:31:43,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:43,804 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 372 transitions. [2020-10-21 21:31:43,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:31:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 372 transitions. [2020-10-21 21:31:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:43,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:43,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:44,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 21:31:44,015 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:44,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:44,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1517859817, now seen corresponding path program 24 times [2020-10-21 21:31:44,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:44,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449346419] [2020-10-21 21:31:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:44,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449346419] [2020-10-21 21:31:44,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298419834] [2020-10-21 21:31:44,115 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 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 [2020-10-21 21:31:44,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 21:31:44,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:44,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:44,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:44,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:44,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:44,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:44,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273396126] [2020-10-21 21:31:44,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:44,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:44,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:44,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:44,401 INFO L87 Difference]: Start difference. First operand 146 states and 372 transitions. Second operand 15 states. [2020-10-21 21:31:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:44,961 INFO L93 Difference]: Finished difference Result 217 states and 530 transitions. [2020-10-21 21:31:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:31:44,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:44,963 INFO L225 Difference]: With dead ends: 217 [2020-10-21 21:31:44,963 INFO L226 Difference]: Without dead ends: 212 [2020-10-21 21:31:44,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-21 21:31:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-21 21:31:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-21 21:31:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-21 21:31:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 366 transitions. [2020-10-21 21:31:44,968 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 366 transitions. Word has length 13 [2020-10-21 21:31:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:44,968 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 366 transitions. [2020-10-21 21:31:44,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 366 transitions. [2020-10-21 21:31:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:44,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:44,969 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:45,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:45,170 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:45,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183978, now seen corresponding path program 25 times [2020-10-21 21:31:45,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:45,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739246522] [2020-10-21 21:31:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:45,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739246522] [2020-10-21 21:31:45,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526206831] [2020-10-21 21:31:45,248 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 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 [2020-10-21 21:31:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:45,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:45,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:31:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:45,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:45,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:45,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656164500] [2020-10-21 21:31:45,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:45,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:45,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:45,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:45,403 INFO L87 Difference]: Start difference. First operand 144 states and 366 transitions. Second operand 15 states. [2020-10-21 21:31:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:45,927 INFO L93 Difference]: Finished difference Result 216 states and 528 transitions. [2020-10-21 21:31:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:31:45,927 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:45,929 INFO L225 Difference]: With dead ends: 216 [2020-10-21 21:31:45,929 INFO L226 Difference]: Without dead ends: 211 [2020-10-21 21:31:45,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-21 21:31:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-21 21:31:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2020-10-21 21:31:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-21 21:31:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 387 transitions. [2020-10-21 21:31:45,934 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 387 transitions. Word has length 13 [2020-10-21 21:31:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:45,934 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 387 transitions. [2020-10-21 21:31:45,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:45,935 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 387 transitions. [2020-10-21 21:31:45,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:45,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:45,936 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:46,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 21:31:46,146 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183017, now seen corresponding path program 26 times [2020-10-21 21:31:46,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:46,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929518546] [2020-10-21 21:31:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:46,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929518546] [2020-10-21 21:31:46,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209967821] [2020-10-21 21:31:46,242 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 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 [2020-10-21 21:31:46,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:31:46,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:46,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:46,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:46,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:46,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:46,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662339930] [2020-10-21 21:31:46,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:46,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:46,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:46,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:46,406 INFO L87 Difference]: Start difference. First operand 149 states and 387 transitions. Second operand 15 states. [2020-10-21 21:31:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:46,998 INFO L93 Difference]: Finished difference Result 215 states and 531 transitions. [2020-10-21 21:31:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:31:46,999 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:47,000 INFO L225 Difference]: With dead ends: 215 [2020-10-21 21:31:47,001 INFO L226 Difference]: Without dead ends: 210 [2020-10-21 21:31:47,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:31:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-21 21:31:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 148. [2020-10-21 21:31:47,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-21 21:31:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 382 transitions. [2020-10-21 21:31:47,006 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 382 transitions. Word has length 13 [2020-10-21 21:31:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:47,006 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 382 transitions. [2020-10-21 21:31:47,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 382 transitions. [2020-10-21 21:31:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:47,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:47,007 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:47,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 21:31:47,207 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1490154187, now seen corresponding path program 27 times [2020-10-21 21:31:47,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:47,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550667744] [2020-10-21 21:31:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:47,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550667744] [2020-10-21 21:31:47,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777626220] [2020-10-21 21:31:47,286 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 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 [2020-10-21 21:31:47,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 21:31:47,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:47,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:47,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:47,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:31:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:47,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:47,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:47,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284815272] [2020-10-21 21:31:47,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:47,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:47,449 INFO L87 Difference]: Start difference. First operand 148 states and 382 transitions. Second operand 15 states. [2020-10-21 21:31:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:48,040 INFO L93 Difference]: Finished difference Result 234 states and 576 transitions. [2020-10-21 21:31:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:31:48,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:48,043 INFO L225 Difference]: With dead ends: 234 [2020-10-21 21:31:48,043 INFO L226 Difference]: Without dead ends: 226 [2020-10-21 21:31:48,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:31:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-21 21:31:48,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 148. [2020-10-21 21:31:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-21 21:31:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 386 transitions. [2020-10-21 21:31:48,049 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 386 transitions. Word has length 13 [2020-10-21 21:31:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:48,049 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 386 transitions. [2020-10-21 21:31:48,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 386 transitions. [2020-10-21 21:31:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:48,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:48,050 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:48,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 21:31:48,261 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:48,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1490153226, now seen corresponding path program 28 times [2020-10-21 21:31:48,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:48,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380143912] [2020-10-21 21:31:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:48,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380143912] [2020-10-21 21:31:48,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671226801] [2020-10-21 21:31:48,341 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 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 [2020-10-21 21:31:48,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:31:48,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:48,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:48,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:48,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:48,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:48,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:48,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984852373] [2020-10-21 21:31:48,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:48,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:48,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:48,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:48,509 INFO L87 Difference]: Start difference. First operand 148 states and 386 transitions. Second operand 15 states. [2020-10-21 21:31:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:49,074 INFO L93 Difference]: Finished difference Result 225 states and 552 transitions. [2020-10-21 21:31:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:31:49,074 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:49,075 INFO L225 Difference]: With dead ends: 225 [2020-10-21 21:31:49,076 INFO L226 Difference]: Without dead ends: 215 [2020-10-21 21:31:49,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:31:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-21 21:31:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 141. [2020-10-21 21:31:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-21 21:31:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 361 transitions. [2020-10-21 21:31:49,081 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 361 transitions. Word has length 13 [2020-10-21 21:31:49,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:49,081 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 361 transitions. [2020-10-21 21:31:49,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:49,081 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 361 transitions. [2020-10-21 21:31:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:49,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:49,082 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:49,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 21:31:49,294 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:49,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:49,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1489259496, now seen corresponding path program 29 times [2020-10-21 21:31:49,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:49,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296053825] [2020-10-21 21:31:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:49,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296053825] [2020-10-21 21:31:49,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268794400] [2020-10-21 21:31:49,373 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 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 [2020-10-21 21:31:49,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:31:49,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:49,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:49,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:49,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:49,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:49,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962075783] [2020-10-21 21:31:49,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:49,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:49,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:49,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:49,644 INFO L87 Difference]: Start difference. First operand 141 states and 361 transitions. Second operand 15 states. [2020-10-21 21:31:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:50,567 INFO L93 Difference]: Finished difference Result 216 states and 520 transitions. [2020-10-21 21:31:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:31:50,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:50,569 INFO L225 Difference]: With dead ends: 216 [2020-10-21 21:31:50,570 INFO L226 Difference]: Without dead ends: 209 [2020-10-21 21:31:50,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:31:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-21 21:31:50,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2020-10-21 21:31:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 21:31:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 317 transitions. [2020-10-21 21:31:50,574 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 317 transitions. Word has length 13 [2020-10-21 21:31:50,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:50,575 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 317 transitions. [2020-10-21 21:31:50,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:50,575 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 317 transitions. [2020-10-21 21:31:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:50,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:50,575 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:50,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 21:31:50,776 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash -631309448, now seen corresponding path program 30 times [2020-10-21 21:31:50,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:50,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624686002] [2020-10-21 21:31:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:50,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624686002] [2020-10-21 21:31:50,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806148001] [2020-10-21 21:31:50,853 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 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 [2020-10-21 21:31:50,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 21:31:50,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:50,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:50,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:50,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:31:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:51,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:51,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:51,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738598738] [2020-10-21 21:31:51,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:51,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:51,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:51,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:51,005 INFO L87 Difference]: Start difference. First operand 129 states and 317 transitions. Second operand 15 states. [2020-10-21 21:31:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:51,327 INFO L93 Difference]: Finished difference Result 189 states and 452 transitions. [2020-10-21 21:31:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:31:51,327 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:51,329 INFO L225 Difference]: With dead ends: 189 [2020-10-21 21:31:51,329 INFO L226 Difference]: Without dead ends: 184 [2020-10-21 21:31:51,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:31:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-21 21:31:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 135. [2020-10-21 21:31:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 21:31:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-10-21 21:31:51,333 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-10-21 21:31:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:51,334 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-10-21 21:31:51,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-10-21 21:31:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:51,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:51,334 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:51,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 21:31:51,536 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:51,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:51,537 INFO L82 PathProgramCache]: Analyzing trace with hash -631308487, now seen corresponding path program 31 times [2020-10-21 21:31:51,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:51,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623893335] [2020-10-21 21:31:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:51,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623893335] [2020-10-21 21:31:51,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282811440] [2020-10-21 21:31:51,627 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 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 [2020-10-21 21:31:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:51,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:51,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:51,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:51,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:51,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980547605] [2020-10-21 21:31:51,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:51,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:51,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:51,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:51,844 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-10-21 21:31:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:52,412 INFO L93 Difference]: Finished difference Result 218 states and 521 transitions. [2020-10-21 21:31:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:31:52,413 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:52,415 INFO L225 Difference]: With dead ends: 218 [2020-10-21 21:31:52,415 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 21:31:52,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-21 21:31:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 21:31:52,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 134. [2020-10-21 21:31:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-21 21:31:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2020-10-21 21:31:52,420 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 13 [2020-10-21 21:31:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:52,420 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2020-10-21 21:31:52,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2020-10-21 21:31:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:52,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:52,421 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:52,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 21:31:52,622 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:52,622 INFO L82 PathProgramCache]: Analyzing trace with hash -631279657, now seen corresponding path program 32 times [2020-10-21 21:31:52,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:52,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504927388] [2020-10-21 21:31:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:52,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504927388] [2020-10-21 21:31:52,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901073058] [2020-10-21 21:31:52,700 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 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 [2020-10-21 21:31:52,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:31:52,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:52,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:52,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:52,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:31:56,413 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-21 21:31:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:56,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:56,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:31:56,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8708016] [2020-10-21 21:31:56,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:31:56,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:31:56,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-21 21:31:56,416 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand 16 states. [2020-10-21 21:31:58,894 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-21 21:33:25,159 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-10-21 21:33:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:40,812 INFO L93 Difference]: Finished difference Result 258 states and 610 transitions. [2020-10-21 21:33:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-21 21:33:40,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 21:33:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:40,846 INFO L225 Difference]: With dead ends: 258 [2020-10-21 21:33:40,846 INFO L226 Difference]: Without dead ends: 248 [2020-10-21 21:33:40,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=377, Invalid=934, Unknown=21, NotChecked=0, Total=1332 [2020-10-21 21:33:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-21 21:33:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 137. [2020-10-21 21:33:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-21 21:33:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-10-21 21:33:40,857 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 13 [2020-10-21 21:33:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:40,857 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-10-21 21:33:40,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:33:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-10-21 21:33:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:40,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:40,858 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:41,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:41,060 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:41,060 INFO L82 PathProgramCache]: Analyzing trace with hash -631278696, now seen corresponding path program 33 times [2020-10-21 21:33:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:41,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364684678] [2020-10-21 21:33:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:41,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364684678] [2020-10-21 21:33:41,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194184372] [2020-10-21 21:33:41,143 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 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 [2020-10-21 21:33:41,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 21:33:41,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:41,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:33:41,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:41,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:33:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:41,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:41,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:33:41,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284799311] [2020-10-21 21:33:41,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:33:41,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:41,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:33:41,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:33:41,317 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 15 states. [2020-10-21 21:33:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:42,108 INFO L93 Difference]: Finished difference Result 234 states and 555 transitions. [2020-10-21 21:33:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:33:42,108 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:33:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:42,110 INFO L225 Difference]: With dead ends: 234 [2020-10-21 21:33:42,110 INFO L226 Difference]: Without dead ends: 226 [2020-10-21 21:33:42,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:33:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-21 21:33:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 135. [2020-10-21 21:33:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 21:33:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-21 21:33:42,117 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-21 21:33:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:42,119 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-21 21:33:42,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:33:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-21 21:33:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:42,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:42,121 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:42,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-21 21:33:42,321 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:42,322 INFO L82 PathProgramCache]: Analyzing trace with hash -630385927, now seen corresponding path program 34 times [2020-10-21 21:33:42,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:42,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856091195] [2020-10-21 21:33:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:42,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856091195] [2020-10-21 21:33:42,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174971461] [2020-10-21 21:33:42,428 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 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 [2020-10-21 21:33:42,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:33:42,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:33:42,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:42,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:33:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:42,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:42,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:33:42,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056372795] [2020-10-21 21:33:42,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:33:42,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:33:42,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:33:42,590 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-21 21:33:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:43,242 INFO L93 Difference]: Finished difference Result 238 states and 569 transitions. [2020-10-21 21:33:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:33:43,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:33:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:43,244 INFO L225 Difference]: With dead ends: 238 [2020-10-21 21:33:43,245 INFO L226 Difference]: Without dead ends: 230 [2020-10-21 21:33:43,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:33:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-21 21:33:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 135. [2020-10-21 21:33:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 21:33:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-10-21 21:33:43,250 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-10-21 21:33:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:43,250 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-10-21 21:33:43,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:33:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-10-21 21:33:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:43,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:43,251 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:43,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:43,463 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:43,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:43,463 INFO L82 PathProgramCache]: Analyzing trace with hash -630384966, now seen corresponding path program 35 times [2020-10-21 21:33:43,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:43,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718630896] [2020-10-21 21:33:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:43,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718630896] [2020-10-21 21:33:43,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436517075] [2020-10-21 21:33:43,545 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 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 [2020-10-21 21:33:43,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:33:43,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:43,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:33:43,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:43,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:33:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:43,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:43,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:33:43,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838727665] [2020-10-21 21:33:43,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:33:43,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:43,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:33:43,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:33:43,701 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-10-21 21:33:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:44,310 INFO L93 Difference]: Finished difference Result 239 states and 572 transitions. [2020-10-21 21:33:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:33:44,311 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:33:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:44,314 INFO L225 Difference]: With dead ends: 239 [2020-10-21 21:33:44,314 INFO L226 Difference]: Without dead ends: 231 [2020-10-21 21:33:44,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:33:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-21 21:33:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 132. [2020-10-21 21:33:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:33:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 326 transitions. [2020-10-21 21:33:44,319 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 326 transitions. Word has length 13 [2020-10-21 21:33:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:44,319 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 326 transitions. [2020-10-21 21:33:44,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:33:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 326 transitions. [2020-10-21 21:33:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:44,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:44,321 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:44,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-21 21:33:44,529 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:44,530 INFO L82 PathProgramCache]: Analyzing trace with hash -630356136, now seen corresponding path program 36 times [2020-10-21 21:33:44,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:44,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913981555] [2020-10-21 21:33:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:44,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913981555] [2020-10-21 21:33:44,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209252923] [2020-10-21 21:33:44,615 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 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 [2020-10-21 21:33:44,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:33:44,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:33:44,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:44,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:33:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:44,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:44,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:33:44,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353273858] [2020-10-21 21:33:44,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:33:44,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:33:44,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:33:44,824 INFO L87 Difference]: Start difference. First operand 132 states and 326 transitions. Second operand 15 states. [2020-10-21 21:33:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:45,472 INFO L93 Difference]: Finished difference Result 228 states and 537 transitions. [2020-10-21 21:33:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:33:45,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:33:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:45,474 INFO L225 Difference]: With dead ends: 228 [2020-10-21 21:33:45,474 INFO L226 Difference]: Without dead ends: 220 [2020-10-21 21:33:45,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:33:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-21 21:33:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 130. [2020-10-21 21:33:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-21 21:33:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-21 21:33:45,479 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-21 21:33:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:45,479 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-21 21:33:45,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:33:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-21 21:33:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:45,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:45,480 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:45,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:45,683 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:45,683 INFO L82 PathProgramCache]: Analyzing trace with hash -353491858, now seen corresponding path program 6 times [2020-10-21 21:33:45,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:45,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690601860] [2020-10-21 21:33:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:45,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690601860] [2020-10-21 21:33:45,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182961495] [2020-10-21 21:33:45,790 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 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 [2020-10-21 21:33:45,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 21:33:45,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:45,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:33:45,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:46,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:33:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:46,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:46,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-21 21:33:46,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865481442] [2020-10-21 21:33:46,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 21:33:46,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:46,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 21:33:46,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:33:46,046 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-21 21:33:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:46,271 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-21 21:33:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 21:33:46,272 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-21 21:33:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:46,273 INFO L225 Difference]: With dead ends: 185 [2020-10-21 21:33:46,274 INFO L226 Difference]: Without dead ends: 180 [2020-10-21 21:33:46,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:33:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-21 21:33:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-21 21:33:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-21 21:33:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-21 21:33:46,277 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-21 21:33:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:46,277 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-21 21:33:46,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 21:33:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-21 21:33:46,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:46,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:46,278 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:46,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-21 21:33:46,479 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:46,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1320134055, now seen corresponding path program 6 times [2020-10-21 21:33:46,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:46,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353935910] [2020-10-21 21:33:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:46,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353935910] [2020-10-21 21:33:46,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575261340] [2020-10-21 21:33:46,586 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 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 [2020-10-21 21:33:46,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 21:33:46,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:33:46,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:46,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 21:33:46,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-21 21:33:46,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116187827] [2020-10-21 21:33:46,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:33:46,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:46,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:33:46,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:33:46,718 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 8 states. [2020-10-21 21:33:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:46,750 INFO L93 Difference]: Finished difference Result 219 states and 568 transitions. [2020-10-21 21:33:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-21 21:33:46,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-21 21:33:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:46,753 INFO L225 Difference]: With dead ends: 219 [2020-10-21 21:33:46,753 INFO L226 Difference]: Without dead ends: 201 [2020-10-21 21:33:46,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:33:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-21 21:33:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-10-21 21:33:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-21 21:33:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 525 transitions. [2020-10-21 21:33:46,758 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 525 transitions. Word has length 13 [2020-10-21 21:33:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:46,758 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 525 transitions. [2020-10-21 21:33:46,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:33:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 525 transitions. [2020-10-21 21:33:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:33:46,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:46,759 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:46,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-21 21:33:46,973 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash 161462414, now seen corresponding path program 37 times [2020-10-21 21:33:46,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:46,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956222998] [2020-10-21 21:33:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:47,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956222998] [2020-10-21 21:33:47,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613554118] [2020-10-21 21:33:47,071 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 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 [2020-10-21 21:33:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:47,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:33:47,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:47,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:33:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:47,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:47,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-21 21:33:47,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753548855] [2020-10-21 21:33:47,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 21:33:47,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:47,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 21:33:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:33:47,362 INFO L87 Difference]: Start difference. First operand 201 states and 525 transitions. Second operand 17 states. [2020-10-21 21:33:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:47,808 INFO L93 Difference]: Finished difference Result 268 states and 660 transitions. [2020-10-21 21:33:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 21:33:47,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-21 21:33:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:47,810 INFO L225 Difference]: With dead ends: 268 [2020-10-21 21:33:47,810 INFO L226 Difference]: Without dead ends: 258 [2020-10-21 21:33:47,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-21 21:33:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-21 21:33:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 201. [2020-10-21 21:33:47,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-21 21:33:47,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 526 transitions. [2020-10-21 21:33:47,817 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 526 transitions. Word has length 14 [2020-10-21 21:33:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:47,818 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 526 transitions. [2020-10-21 21:33:47,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 21:33:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 526 transitions. [2020-10-21 21:33:47,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:33:47,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:47,819 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:48,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-21 21:33:48,031 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:48,032 INFO L82 PathProgramCache]: Analyzing trace with hash 161491244, now seen corresponding path program 38 times [2020-10-21 21:33:48,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:48,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966659449] [2020-10-21 21:33:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:48,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966659449] [2020-10-21 21:33:48,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322619854] [2020-10-21 21:33:48,131 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 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 [2020-10-21 21:33:48,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:33:48,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:48,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:33:48,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:48,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:33:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:50,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:50,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-21 21:33:50,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723299722] [2020-10-21 21:33:50,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 21:33:50,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 21:33:50,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-21 21:33:50,454 INFO L87 Difference]: Start difference. First operand 201 states and 526 transitions. Second operand 18 states. [2020-10-21 21:33:54,265 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-21 21:33:56,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:56,755 INFO L93 Difference]: Finished difference Result 285 states and 699 transitions. [2020-10-21 21:33:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-21 21:33:56,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-21 21:33:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:56,758 INFO L225 Difference]: With dead ends: 285 [2020-10-21 21:33:56,758 INFO L226 Difference]: Without dead ends: 273 [2020-10-21 21:33:56,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=307, Invalid=622, Unknown=1, NotChecked=0, Total=930 [2020-10-21 21:33:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-21 21:33:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 203. [2020-10-21 21:33:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-21 21:33:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 531 transitions. [2020-10-21 21:33:56,764 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 531 transitions. Word has length 14 [2020-10-21 21:33:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:56,764 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 531 transitions. [2020-10-21 21:33:56,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 21:33:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 531 transitions. [2020-10-21 21:33:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:33:56,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:56,765 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:56,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-21 21:33:56,978 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:56,979 INFO L82 PathProgramCache]: Analyzing trace with hash 161492205, now seen corresponding path program 39 times [2020-10-21 21:33:56,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:56,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457630687] [2020-10-21 21:33:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:57,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457630687] [2020-10-21 21:33:57,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780891582] [2020-10-21 21:33:57,078 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 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 [2020-10-21 21:33:57,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 21:33:57,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:33:57,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:57,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:33:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:57,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:57,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-21 21:33:57,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473282640] [2020-10-21 21:33:57,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 21:33:57,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:57,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 21:33:57,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:33:57,303 INFO L87 Difference]: Start difference. First operand 203 states and 531 transitions. Second operand 17 states. [2020-10-21 21:33:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:57,779 INFO L93 Difference]: Finished difference Result 275 states and 685 transitions. [2020-10-21 21:33:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 21:33:57,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-21 21:33:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:57,783 INFO L225 Difference]: With dead ends: 275 [2020-10-21 21:33:57,783 INFO L226 Difference]: Without dead ends: 270 [2020-10-21 21:33:57,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-21 21:33:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-21 21:33:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 203. [2020-10-21 21:33:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-21 21:33:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 531 transitions. [2020-10-21 21:33:57,789 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 531 transitions. Word has length 14 [2020-10-21 21:33:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:57,789 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 531 transitions. [2020-10-21 21:33:57,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 21:33:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 531 transitions. [2020-10-21 21:33:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:33:57,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:57,790 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:58,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:58,000 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash 162384974, now seen corresponding path program 40 times [2020-10-21 21:33:58,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:58,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663583656] [2020-10-21 21:33:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:58,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663583656] [2020-10-21 21:33:58,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135555260] [2020-10-21 21:33:58,099 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 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 [2020-10-21 21:33:58,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:33:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:58,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:33:58,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:58,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:33:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:58,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:58,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-21 21:33:58,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036290200] [2020-10-21 21:33:58,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 21:33:58,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:58,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 21:33:58,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:33:58,358 INFO L87 Difference]: Start difference. First operand 203 states and 531 transitions. Second operand 17 states. [2020-10-21 21:33:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:59,049 INFO L93 Difference]: Finished difference Result 294 states and 718 transitions. [2020-10-21 21:33:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 21:33:59,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-21 21:33:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:59,051 INFO L225 Difference]: With dead ends: 294 [2020-10-21 21:33:59,051 INFO L226 Difference]: Without dead ends: 280 [2020-10-21 21:33:59,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2020-10-21 21:33:59,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-21 21:33:59,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 206. [2020-10-21 21:33:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-21 21:33:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 541 transitions. [2020-10-21 21:33:59,056 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 541 transitions. Word has length 14 [2020-10-21 21:33:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:59,056 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 541 transitions. [2020-10-21 21:33:59,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 21:33:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 541 transitions. [2020-10-21 21:33:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:33:59,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:59,057 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:59,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:59,261 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:59,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:59,262 INFO L82 PathProgramCache]: Analyzing trace with hash 162385935, now seen corresponding path program 41 times [2020-10-21 21:33:59,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:59,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133067282] [2020-10-21 21:33:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:59,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133067282] [2020-10-21 21:33:59,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251559745] [2020-10-21 21:33:59,355 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 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 [2020-10-21 21:33:59,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:33:59,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:59,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:33:59,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:01,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts Received shutdown request... [2020-10-21 21:34:05,748 WARN L210 SmtUtils]: Removed 1 from assertion stack [2020-10-21 21:34:05,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-21 21:34:05,949 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-21 21:34:05,954 WARN L235 ceAbstractionStarter]: Timeout [2020-10-21 21:34:05,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 09:34:05 BasicIcfg [2020-10-21 21:34:05,954 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 21:34:05,955 INFO L168 Benchmark]: Toolchain (without parser) took 279819.90 ms. Allocated memory was 140.5 MB in the beginning and 319.3 MB in the end (delta: 178.8 MB). Free memory was 102.7 MB in the beginning and 232.1 MB in the end (delta: -129.4 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:05,956 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-21 21:34:05,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 733.48 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 159.9 MB in the end (delta: -58.1 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:05,957 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.29 ms. Allocated memory is still 203.4 MB. Free memory was 159.3 MB in the beginning and 157.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:05,957 INFO L168 Benchmark]: Boogie Preprocessor took 27.75 ms. Allocated memory is still 203.4 MB. Free memory was 157.3 MB in the beginning and 155.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:05,957 INFO L168 Benchmark]: RCFGBuilder took 439.82 ms. Allocated memory is still 203.4 MB. Free memory was 155.9 MB in the beginning and 133.5 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:05,958 INFO L168 Benchmark]: TraceAbstraction took 278563.01 ms. Allocated memory was 203.4 MB in the beginning and 319.3 MB in the end (delta: 115.9 MB). Free memory was 132.9 MB in the beginning and 232.1 MB in the end (delta: -99.2 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:05,960 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 733.48 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 159.9 MB in the end (delta: -58.1 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.29 ms. Allocated memory is still 203.4 MB. Free memory was 159.3 MB in the beginning and 157.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.75 ms. Allocated memory is still 203.4 MB. Free memory was 157.3 MB in the beginning and 155.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 439.82 ms. Allocated memory is still 203.4 MB. Free memory was 155.9 MB in the beginning and 133.5 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 278563.01 ms. Allocated memory was 203.4 MB in the beginning and 319.3 MB in the end (delta: 115.9 MB). Free memory was 132.9 MB in the beginning and 232.1 MB in the end (delta: -99.2 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 866 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.8s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 16 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 6 FixpointIterations, 16 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 65 TotalNumberOfCompositions, 1183 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 44 for 2050ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 278.4s, OverallIterations: 54, TraceHistogramMax: 6, AutomataDifference: 228.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 709 SDtfs, 5652 SDslu, 4849 SDs, 0 SdLazy, 3524 SolverSat, 1031 SolverUnsat, 65 SolverUnknown, 0 SolverNotchecked, 125.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1421 GetRequests, 234 SyntacticMatches, 42 SemanticMatches, 1145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6411 ImplicationChecksByTransitivity, 125.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 53 MinimizatonAttempts, 2619 StatesRemovedByMinimization, 52 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 27.7s InterpolantComputationTime, 1214 NumberOfCodeBlocks, 1214 NumberOfCodeBlocksAsserted, 156 NumberOfCheckSat, 1113 ConstructedInterpolants, 7 QuantifiedInterpolants, 104963 SizeOfPredicates, 47 NumberOfNonLiveVariables, 4744 ConjunctsInSsa, 450 ConjunctsInUnsatCore, 101 InterpolantComputations, 6 PerfectInterpolantSequences, 15/440 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown