/usr/bin/java -Xmx16000000000 -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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 16:13:20,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 16:13:20,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 16:13:20,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 16:13:20,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 16:13:20,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 16:13:20,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 16:13:20,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 16:13:20,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 16:13:20,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 16:13:20,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 16:13:20,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 16:13:20,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 16:13:20,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 16:13:20,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 16:13:20,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 16:13:20,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 16:13:20,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 16:13:20,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 16:13:20,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 16:13:20,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 16:13:20,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 16:13:20,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 16:13:20,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 16:13:20,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-15 16:13:20,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 16:13:20,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 16:13:20,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 16:13:20,843 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 [2020-10-15 16:13:20,891 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 16:13:20,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 16:13:20,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 16:13:20,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 16:13:20,894 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 16:13:20,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 16:13:20,895 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 16:13:20,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 16:13:20,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 16:13:20,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 16:13:20,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 16:13:20,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 16:13:20,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 16:13:20,896 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 16:13:20,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 16:13:20,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 16:13:20,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 16:13:20,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 16:13:20,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 16:13:20,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 16:13:20,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 16:13:20,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:13:20,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 16:13:20,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 16:13:20,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 16:13:20,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 16:13:20,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 16:13:20,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 16:13:20,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 16:13:20,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 16:13:21,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 16:13:21,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 16:13:21,256 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 16:13:21,258 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 16:13:21,260 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 16:13:21,261 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-15 16:13:21,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e00d06bc/0cb2f070109240d1ba7060be59da427e/FLAG1d5ad61f0 [2020-10-15 16:13:21,854 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 16:13:21,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-15 16:13:21,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e00d06bc/0cb2f070109240d1ba7060be59da427e/FLAG1d5ad61f0 [2020-10-15 16:13:22,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e00d06bc/0cb2f070109240d1ba7060be59da427e [2020-10-15 16:13:22,165 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 16:13:22,170 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 16:13:22,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 16:13:22,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 16:13:22,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 16:13:22,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75ac0def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22, skipping insertion in model container [2020-10-15 16:13:22,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 16:13:22,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 16:13:22,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:13:22,787 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 16:13:22,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:13:22,897 INFO L208 MainTranslator]: Completed translation [2020-10-15 16:13:22,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22 WrapperNode [2020-10-15 16:13:22,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 16:13:22,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 16:13:22,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 16:13:22,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 16:13:22,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 16:13:22,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 16:13:22,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 16:13:22,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 16:13:22,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 16:13:22,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 16:13:22,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 16:13:22,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 16:13:22,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (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 [2020-10-15 16:13:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 16:13:23,046 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 16:13:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 16:13:23,047 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 16:13:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 16:13:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 16:13:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 16:13:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 16:13:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 16:13:23,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 16:13:23,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 16:13:23,049 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 16:13:23,449 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 16:13:23,449 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 16:13:23,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:13:23 BoogieIcfgContainer [2020-10-15 16:13:23,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 16:13:23,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 16:13:23,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 16:13:23,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 16:13:23,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:13:22" (1/3) ... [2020-10-15 16:13:23,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcdf233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:13:23, skipping insertion in model container [2020-10-15 16:13:23,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (2/3) ... [2020-10-15 16:13:23,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcdf233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:13:23, skipping insertion in model container [2020-10-15 16:13:23,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:13:23" (3/3) ... [2020-10-15 16:13:23,459 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-10-15 16:13:23,469 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 16:13:23,469 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 16:13:23,475 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 16:13:23,475 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 16:13:23,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,501 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,501 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,501 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,501 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,502 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,502 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,502 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,502 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,503 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,503 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,503 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,506 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,506 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,506 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,506 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,507 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,510 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,511 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,511 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,519 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,519 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,520 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,520 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,536 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 16:13:23,552 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 16:13:23,552 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 16:13:23,552 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 16:13:23,553 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 16:13:23,553 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 16:13:23,553 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 16:13:23,553 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 16:13:23,553 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 16:13:23,565 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 16:13:23,568 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:23,571 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:23,572 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:23,609 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 16:13:23,609 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 16:13:23,615 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-15 16:13:23,617 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-15 16:13:24,574 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 16:13:24,657 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-15 16:13:24,658 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-15 16:13:24,665 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-15 16:13:24,676 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 16:13:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 16:13:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 16:13:24,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:24,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 16:13:24,686 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:24,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-15 16:13:24,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:24,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71437038] [2020-10-15 16:13:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:24,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71437038] [2020-10-15 16:13:24,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:24,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 16:13:24,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727462874] [2020-10-15 16:13:24,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 16:13:24,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:24,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 16:13:24,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 16:13:24,935 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 16:13:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,007 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-15 16:13:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:13:25,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 16:13:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,021 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:13:25,021 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:13:25,022 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 [2020-10-15 16:13:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:13:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-15 16:13:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:13:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-15 16:13:25,067 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-15 16:13:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,068 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-15 16:13:25,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 16:13:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-15 16:13:25,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:25,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 16:13:25,070 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,070 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-15 16:13:25,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028895720] [2020-10-15 16:13:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028895720] [2020-10-15 16:13:25,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:25,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196635075] [2020-10-15 16:13:25,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:25,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,199 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-15 16:13:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,272 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-15 16:13:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:25,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,276 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:13:25,276 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 16:13:25,278 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 [2020-10-15 16:13:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 16:13:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-15 16:13:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:13:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-15 16:13:25,290 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-15 16:13:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,292 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-15 16:13:25,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-15 16:13:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:25,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 16:13:25,293 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,294 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-15 16:13:25,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502541015] [2020-10-15 16:13:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502541015] [2020-10-15 16:13:25,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:25,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474649114] [2020-10-15 16:13:25,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:25,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:25,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,364 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-15 16:13:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,388 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-15 16:13:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:13:25,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,390 INFO L225 Difference]: With dead ends: 73 [2020-10-15 16:13:25,390 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 16:13:25,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 16:13:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-15 16:13:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:13:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-15 16:13:25,399 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-15 16:13:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,400 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-15 16:13:25,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-15 16:13:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:25,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 16:13:25,402 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-15 16:13:25,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272766200] [2020-10-15 16:13:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272766200] [2020-10-15 16:13:25,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:25,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472250497] [2020-10-15 16:13:25,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:25,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,458 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-15 16:13:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,514 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-15 16:13:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:25,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,516 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:13:25,516 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:13:25,517 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 [2020-10-15 16:13:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:13:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-15 16:13:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:13:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-15 16:13:25,525 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-15 16:13:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,526 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-15 16:13:25,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-15 16:13:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:25,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,527 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 16:13:25,528 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-15 16:13:25,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280863113] [2020-10-15 16:13:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280863113] [2020-10-15 16:13:25,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057259340] [2020-10-15 16:13:25,622 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 [2020-10-15 16:13:25,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:25,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:25,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:25,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:25,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:25,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-15 16:13:25,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438437258] [2020-10-15 16:13:25,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:13:25,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:13:25,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:13:25,839 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-15 16:13:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,930 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-15 16:13:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:25,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-15 16:13:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,933 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:13:25,933 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:13:25,933 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 [2020-10-15 16:13:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:13:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-15 16:13:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:13:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-15 16:13:25,944 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-15 16:13:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,945 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-15 16:13:25,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:13:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-15 16:13:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:25,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,946 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:26,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:26,149 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:26,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-15 16:13:26,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:26,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87936185] [2020-10-15 16:13:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87936185] [2020-10-15 16:13:26,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781206473] [2020-10-15 16:13:26,263 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 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 [2020-10-15 16:13:26,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:26,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:26,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:26,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:26,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:26,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990820424] [2020-10-15 16:13:26,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:26,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:26,387 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-15 16:13:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:26,419 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 16:13:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 16:13:26,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:26,420 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:13:26,420 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:13:26,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:26,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:13:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-15 16:13:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:13:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-15 16:13:26,427 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-15 16:13:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:26,428 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-15 16:13:26,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-15 16:13:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:26,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:26,429 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:26,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:26,644 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-15 16:13:26,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:26,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787558230] [2020-10-15 16:13:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787558230] [2020-10-15 16:13:26,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192815418] [2020-10-15 16:13:26,728 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 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 [2020-10-15 16:13:26,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:26,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:26,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:26,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:26,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:26,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392939002] [2020-10-15 16:13:26,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:26,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:26,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:26,843 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-15 16:13:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:26,896 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-15 16:13:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:26,897 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:26,898 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:13:26,898 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:13:26,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:13:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:13:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-15 16:13:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:13:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-15 16:13:26,905 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-15 16:13:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:26,906 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-15 16:13:26,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-15 16:13:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:26,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:26,907 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:27,121 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-15 16:13:27,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285447231] [2020-10-15 16:13:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285447231] [2020-10-15 16:13:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050029052] [2020-10-15 16:13:27,170 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 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 [2020-10-15 16:13:27,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:27,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:27,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:27,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:27,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:27,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823622049] [2020-10-15 16:13:27,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:27,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:27,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:27,282 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-15 16:13:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:27,366 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 16:13:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:27,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:27,368 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:13:27,368 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:13:27,368 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 [2020-10-15 16:13:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:13:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-15 16:13:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:13:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-15 16:13:27,374 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-15 16:13:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:27,375 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-15 16:13:27,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-15 16:13:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:27,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:27,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:27,590 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-15 16:13:27,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857869146] [2020-10-15 16:13:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857869146] [2020-10-15 16:13:27,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:27,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:27,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570334412] [2020-10-15 16:13:27,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:27,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:27,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:27,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:27,662 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-15 16:13:27,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:27,687 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-15 16:13:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 16:13:27,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:27,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:27,688 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:13:27,689 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:13:27,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:13:27,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-15 16:13:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:13:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-15 16:13:27,694 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-15 16:13:27,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:27,695 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-15 16:13:27,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:27,695 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-15 16:13:27,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:27,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:27,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 16:13:27,697 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-15 16:13:27,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976436254] [2020-10-15 16:13:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976436254] [2020-10-15 16:13:27,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:27,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:27,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839030498] [2020-10-15 16:13:27,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:27,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:27,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:27,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:27,764 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-15 16:13:27,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:27,807 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-15 16:13:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:27,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:27,809 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:13:27,809 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:13:27,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:13:27,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:13:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-15 16:13:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:13:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-15 16:13:27,814 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-15 16:13:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:27,815 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-15 16:13:27,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:27,815 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-15 16:13:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:27,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:27,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 16:13:27,817 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-15 16:13:27,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391626558] [2020-10-15 16:13:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391626558] [2020-10-15 16:13:27,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:27,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:27,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5391198] [2020-10-15 16:13:27,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:27,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:27,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:27,878 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-15 16:13:27,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:27,970 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 16:13:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:27,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:27,971 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:13:27,972 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:13:27,972 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 [2020-10-15 16:13:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:13:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 16:13:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:13:27,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-15 16:13:27,976 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-15 16:13:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:27,976 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-15 16:13:27,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-15 16:13:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:27,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:27,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 16:13:27,978 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-15 16:13:27,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166581421] [2020-10-15 16:13:27,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166581421] [2020-10-15 16:13:28,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:28,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:28,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75132494] [2020-10-15 16:13:28,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:28,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:28,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:28,024 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-15 16:13:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,086 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 16:13:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:28,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:28,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,088 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:13:28,088 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:13:28,088 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 [2020-10-15 16:13:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:13:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 16:13:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:13:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-15 16:13:28,092 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-15 16:13:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,093 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-15 16:13:28,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-15 16:13:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,094 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:28,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 16:13:28,094 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:28,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-15 16:13:28,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:28,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218700249] [2020-10-15 16:13:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218700249] [2020-10-15 16:13:28,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206315819] [2020-10-15 16:13:28,154 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 [2020-10-15 16:13:28,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:28,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:28,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:28,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:28,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:28,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-15 16:13:28,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949775387] [2020-10-15 16:13:28,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:13:28,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:13:28,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:28,293 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-15 16:13:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,379 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-15 16:13:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:28,379 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-15 16:13:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,380 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:13:28,380 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:13:28,381 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 [2020-10-15 16:13:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:13:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-15 16:13:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:13:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-15 16:13:28,385 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-15 16:13:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,385 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-15 16:13:28,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:13:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-15 16:13:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,386 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:28,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 16:13:28,597 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:28,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-15 16:13:28,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:28,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162703988] [2020-10-15 16:13:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162703988] [2020-10-15 16:13:28,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134108873] [2020-10-15 16:13:28,672 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 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 [2020-10-15 16:13:28,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:28,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:28,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:28,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:28,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:28,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406840817] [2020-10-15 16:13:28,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:28,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:28,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:28,815 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-15 16:13:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,856 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 16:13:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:28,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,858 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:13:28,858 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:13:28,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:28,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:13:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-15 16:13:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:13:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-15 16:13:28,866 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-15 16:13:28,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,866 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-15 16:13:28,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-15 16:13:28,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,869 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:29,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:29,081 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:29,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-15 16:13:29,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:29,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536571603] [2020-10-15 16:13:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536571603] [2020-10-15 16:13:29,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038572921] [2020-10-15 16:13:29,151 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 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 [2020-10-15 16:13:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:29,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:29,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:29,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:29,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863090971] [2020-10-15 16:13:29,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:29,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:29,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:29,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:29,274 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-15 16:13:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:29,333 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-15 16:13:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:29,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:29,334 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:13:29,334 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:13:29,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:13:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-15 16:13:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:13:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-15 16:13:29,340 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-15 16:13:29,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:29,340 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-15 16:13:29,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:29,340 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-15 16:13:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:29,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:29,341 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:29,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 16:13:29,552 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-15 16:13:29,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:29,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319700951] [2020-10-15 16:13:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319700951] [2020-10-15 16:13:29,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430895858] [2020-10-15 16:13:29,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:29,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:29,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:29,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:29,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:29,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:29,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065344683] [2020-10-15 16:13:29,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:29,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:29,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:29,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:29,742 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-15 16:13:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:29,830 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-15 16:13:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:29,831 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:29,832 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:13:29,833 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:13:29,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:13:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-15 16:13:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:13:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-15 16:13:29,838 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-15 16:13:29,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:29,839 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-15 16:13:29,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-15 16:13:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:29,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:29,840 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:30,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 16:13:30,050 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:30,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-15 16:13:30,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:30,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342423904] [2020-10-15 16:13:30,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342423904] [2020-10-15 16:13:30,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592813156] [2020-10-15 16:13:30,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:30,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:30,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:30,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:30,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:30,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:30,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858412217] [2020-10-15 16:13:30,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:30,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:30,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:30,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:30,273 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-15 16:13:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:30,379 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-15 16:13:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:30,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:30,380 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:13:30,380 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:13:30,381 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 [2020-10-15 16:13:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:13:30,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-15 16:13:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:13:30,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-15 16:13:30,386 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-15 16:13:30,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:30,387 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-15 16:13:30,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:30,387 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-15 16:13:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:30,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:30,388 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:30,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 16:13:30,598 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-15 16:13:30,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:30,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239837224] [2020-10-15 16:13:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239837224] [2020-10-15 16:13:30,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619307215] [2020-10-15 16:13:30,657 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 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 [2020-10-15 16:13:30,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:30,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:30,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:30,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:30,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:30,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753811170] [2020-10-15 16:13:30,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:30,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:30,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:30,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:30,783 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-15 16:13:30,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:30,828 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-15 16:13:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:30,828 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:30,829 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:13:30,830 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:13:30,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:13:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-15 16:13:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:13:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-15 16:13:30,834 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-15 16:13:30,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:30,835 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-15 16:13:30,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-15 16:13:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:30,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:30,836 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:31,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 16:13:31,044 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:31,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:31,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-15 16:13:31,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:31,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949668220] [2020-10-15 16:13:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949668220] [2020-10-15 16:13:31,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114986632] [2020-10-15 16:13:31,113 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 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 [2020-10-15 16:13:31,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:31,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:31,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:31,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:31,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266835622] [2020-10-15 16:13:31,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:31,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:31,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:31,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:31,229 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-15 16:13:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:31,292 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-15 16:13:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:31,292 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:31,294 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:13:31,294 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:13:31,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:13:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-15 16:13:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:13:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-15 16:13:31,299 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-15 16:13:31,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:31,300 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-15 16:13:31,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-15 16:13:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:31,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:31,300 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:31,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:31,511 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:31,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-15 16:13:31,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:31,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598686704] [2020-10-15 16:13:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598686704] [2020-10-15 16:13:31,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024538713] [2020-10-15 16:13:31,583 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 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 [2020-10-15 16:13:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:31,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:31,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:31,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:31,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828451812] [2020-10-15 16:13:31,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:31,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:31,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:31,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:31,728 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-15 16:13:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:31,806 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-15 16:13:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:31,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:31,807 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:13:31,807 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:13:31,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:13:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 16:13:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:13:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-15 16:13:31,812 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-15 16:13:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:31,812 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-15 16:13:31,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-15 16:13:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:31,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:31,813 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:32,014 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-15 16:13:32,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124394725] [2020-10-15 16:13:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124394725] [2020-10-15 16:13:32,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900186918] [2020-10-15 16:13:32,082 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 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 [2020-10-15 16:13:32,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:32,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:32,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:32,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:32,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:32,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639016364] [2020-10-15 16:13:32,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:32,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:32,197 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-15 16:13:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:32,252 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-15 16:13:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:32,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:32,259 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:13:32,259 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:13:32,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:13:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-15 16:13:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:13:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-15 16:13:32,263 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-15 16:13:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:32,264 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-15 16:13:32,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-15 16:13:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:32,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,265 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 16:13:32,476 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-15 16:13:32,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510737653] [2020-10-15 16:13:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510737653] [2020-10-15 16:13:32,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599865058] [2020-10-15 16:13:32,550 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 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 [2020-10-15 16:13:32,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:32,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:32,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:32,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:32,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:32,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623767724] [2020-10-15 16:13:32,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:32,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:32,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:32,665 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:32,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:32,754 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-15 16:13:32,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:32,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:32,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:32,755 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:13:32,755 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:13:32,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:13:32,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-15 16:13:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-15 16:13:32,762 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-15 16:13:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:32,762 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-15 16:13:32,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:32,762 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-15 16:13:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:32,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,763 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:32,974 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-15 16:13:32,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931084318] [2020-10-15 16:13:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931084318] [2020-10-15 16:13:33,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492113614] [2020-10-15 16:13:33,032 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 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 [2020-10-15 16:13:33,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:33,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:33,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:33,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:33,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470020826] [2020-10-15 16:13:33,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:33,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:33,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:33,148 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-15 16:13:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,214 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 16:13:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:33,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,217 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:13:33,217 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:13:33,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:13:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-15 16:13:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 16:13:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-15 16:13:33,221 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-15 16:13:33,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,222 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-15 16:13:33,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:33,222 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-15 16:13:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:33,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,224 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 16:13:33,435 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-15 16:13:33,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839319363] [2020-10-15 16:13:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839319363] [2020-10-15 16:13:33,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454663499] [2020-10-15 16:13:33,483 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 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 [2020-10-15 16:13:33,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:33,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:33,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:33,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:33,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:33,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:33,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582691370] [2020-10-15 16:13:33,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:33,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:33,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:33,618 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-15 16:13:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,787 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-15 16:13:33,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:33,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:33,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,789 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:13:33,789 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:13:33,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:13:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-15 16:13:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 16:13:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-15 16:13:33,794 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-15 16:13:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,794 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-15 16:13:33,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-15 16:13:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:33,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,795 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:34,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,008 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:34,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-15 16:13:34,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:34,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358062962] [2020-10-15 16:13:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358062962] [2020-10-15 16:13:34,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389185676] [2020-10-15 16:13:34,059 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 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 [2020-10-15 16:13:34,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:34,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:34,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:34,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012063089] [2020-10-15 16:13:34,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:34,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:34,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:34,198 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:34,306 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-15 16:13:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:34,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:34,307 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:13:34,308 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:13:34,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:34,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:13:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-15 16:13:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:13:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 16:13:34,313 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 16:13:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:34,314 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 16:13:34,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 16:13:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:34,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:34,315 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:34,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 16:13:34,527 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:34,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-15 16:13:34,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:34,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958931473] [2020-10-15 16:13:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958931473] [2020-10-15 16:13:34,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347756208] [2020-10-15 16:13:34,598 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 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 [2020-10-15 16:13:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:34,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:34,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:34,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024093805] [2020-10-15 16:13:34,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:34,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:34,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:34,709 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 16:13:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:34,924 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-15 16:13:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:13:34,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:34,926 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:13:34,926 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:13:34,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:13:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-15 16:13:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:13:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 16:13:34,932 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 16:13:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:34,932 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 16:13:34,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 16:13:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:34,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:34,933 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 16:13:35,145 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-15 16:13:35,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635540451] [2020-10-15 16:13:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635540451] [2020-10-15 16:13:35,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589294398] [2020-10-15 16:13:35,198 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 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 [2020-10-15 16:13:35,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:35,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:35,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:35,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:35,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:35,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:35,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374687386] [2020-10-15 16:13:35,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:35,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:35,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:35,334 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 16:13:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,485 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-15 16:13:35,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:35,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:35,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,489 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:13:35,489 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:13:35,489 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 [2020-10-15 16:13:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:13:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-15 16:13:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-15 16:13:35,494 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-15 16:13:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,495 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-15 16:13:35,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:35,496 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-15 16:13:35,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:35,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,498 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 16:13:35,699 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-15 16:13:35,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096368026] [2020-10-15 16:13:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096368026] [2020-10-15 16:13:35,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308296193] [2020-10-15 16:13:35,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 16:13:35,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:35,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:35,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:35,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:35,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:35,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506945659] [2020-10-15 16:13:35,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:35,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:35,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:35,867 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-15 16:13:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,963 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-15 16:13:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:35,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,965 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:13:35,965 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:13:35,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:13:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-15 16:13:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 16:13:35,969 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 16:13:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,969 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 16:13:35,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 16:13:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:35,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,970 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:36,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 16:13:36,179 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-15 16:13:36,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:36,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922670324] [2020-10-15 16:13:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922670324] [2020-10-15 16:13:36,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567328002] [2020-10-15 16:13:36,235 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 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 [2020-10-15 16:13:36,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:36,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:36,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:36,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:36,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:36,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615410024] [2020-10-15 16:13:36,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:36,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:36,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:36,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:36,368 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 16:13:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:36,487 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-15 16:13:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:36,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:36,488 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:13:36,488 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:13:36,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:36,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:13:36,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-15 16:13:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 16:13:36,492 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 16:13:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:36,493 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 16:13:36,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:36,493 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 16:13:36,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:36,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:36,493 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:36,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 16:13:36,703 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-15 16:13:36,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:36,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406540259] [2020-10-15 16:13:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406540259] [2020-10-15 16:13:36,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407656877] [2020-10-15 16:13:36,750 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 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 [2020-10-15 16:13:36,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:36,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:36,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:36,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:36,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:36,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:36,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111347975] [2020-10-15 16:13:36,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:36,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:36,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:36,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:36,852 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:36,969 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-15 16:13:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:36,970 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:36,971 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:13:36,971 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:13:36,972 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 [2020-10-15 16:13:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:13:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-15 16:13:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 16:13:36,975 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 16:13:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:36,976 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 16:13:36,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 16:13:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:36,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:36,977 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:37,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:37,188 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:37,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-15 16:13:37,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:37,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232969535] [2020-10-15 16:13:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232969535] [2020-10-15 16:13:37,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199622510] [2020-10-15 16:13:37,241 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 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 [2020-10-15 16:13:37,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:37,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:37,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:37,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:37,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:37,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:37,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192987519] [2020-10-15 16:13:37,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:37,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:37,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:37,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:37,369 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:37,634 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-15 16:13:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:13:37,635 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:37,636 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:13:37,637 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:13:37,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:13:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-15 16:13:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 16:13:37,644 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 16:13:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:37,644 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 16:13:37,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 16:13:37,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:37,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:37,645 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:37,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-15 16:13:37,857 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-15 16:13:37,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:37,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55953654] [2020-10-15 16:13:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55953654] [2020-10-15 16:13:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157121089] [2020-10-15 16:13:37,944 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 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 [2020-10-15 16:13:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:37,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:38,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:38,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:38,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509735196] [2020-10-15 16:13:38,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:38,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:38,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:38,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:38,090 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 16:13:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:38,246 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-15 16:13:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:38,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,247 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:13:38,247 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:13:38,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:13:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-15 16:13:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:13:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-15 16:13:38,250 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-15 16:13:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,251 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-15 16:13:38,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-15 16:13:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,251 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:38,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:38,459 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:38,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:38,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-15 16:13:38,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:38,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831545888] [2020-10-15 16:13:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831545888] [2020-10-15 16:13:38,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394177565] [2020-10-15 16:13:38,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:38,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:38,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:38,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:38,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:38,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:38,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-15 16:13:38,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10212803] [2020-10-15 16:13:38,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:13:38,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:38,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:13:38,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:38,671 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-15 16:13:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:38,776 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-15 16:13:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:38,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-15 16:13:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,778 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:13:38,778 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:13:38,779 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 [2020-10-15 16:13:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:13:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-15 16:13:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:13:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-15 16:13:38,783 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-15 16:13:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,784 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-15 16:13:38,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:13:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-15 16:13:38,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,785 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:38,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 16:13:38,996 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-15 16:13:38,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:38,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976913044] [2020-10-15 16:13:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976913044] [2020-10-15 16:13:39,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377818376] [2020-10-15 16:13:39,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:39,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:39,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:39,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:39,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095108012] [2020-10-15 16:13:39,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:39,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:39,222 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-15 16:13:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:39,264 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-15 16:13:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:39,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:39,265 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:13:39,265 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:13:39,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:13:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 16:13:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:13:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 16:13:39,270 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 16:13:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:39,270 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 16:13:39,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 16:13:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:39,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:39,271 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:39,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 16:13:39,472 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:39,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-15 16:13:39,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:39,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636039892] [2020-10-15 16:13:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636039892] [2020-10-15 16:13:39,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017737256] [2020-10-15 16:13:39,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:13:39,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:39,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:39,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781862006] [2020-10-15 16:13:39,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:39,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:39,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:39,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:39,683 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 16:13:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:39,736 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-15 16:13:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:39,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:39,738 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:13:39,738 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:13:39,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:39,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:13:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-15 16:13:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:13:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 16:13:39,742 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 16:13:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:39,742 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 16:13:39,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 16:13:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:39,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:39,743 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:39,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 16:13:39,952 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:39,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:39,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-15 16:13:39,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:39,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651246331] [2020-10-15 16:13:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651246331] [2020-10-15 16:13:40,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448920209] [2020-10-15 16:13:40,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:13:40,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:40,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:40,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253426626] [2020-10-15 16:13:40,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:40,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:40,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:40,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:40,180 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 16:13:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:40,269 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-15 16:13:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:40,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:40,271 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:13:40,271 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:13:40,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:13:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-15 16:13:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 16:13:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-15 16:13:40,277 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-15 16:13:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:40,277 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-15 16:13:40,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-15 16:13:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:40,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:40,278 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:40,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 16:13:40,490 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:40,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:40,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-15 16:13:40,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:40,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774758973] [2020-10-15 16:13:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774758973] [2020-10-15 16:13:40,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793331512] [2020-10-15 16:13:40,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:40,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:40,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:40,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484180713] [2020-10-15 16:13:40,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:40,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:40,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:40,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:40,682 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-15 16:13:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:40,773 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-15 16:13:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:40,773 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:40,775 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:13:40,775 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:13:40,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:13:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-15 16:13:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:13:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-15 16:13:40,780 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-15 16:13:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:40,780 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-15 16:13:40,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-15 16:13:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:40,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:40,781 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:40,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 16:13:40,993 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:40,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-15 16:13:40,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:40,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33406454] [2020-10-15 16:13:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33406454] [2020-10-15 16:13:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201647236] [2020-10-15 16:13:41,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:41,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:41,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:41,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:41,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:41,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:41,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295397017] [2020-10-15 16:13:41,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:41,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:41,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:41,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:41,194 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-15 16:13:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:41,331 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 16:13:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:41,332 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:41,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:41,333 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:13:41,333 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:13:41,334 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 [2020-10-15 16:13:41,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:13:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-15 16:13:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 16:13:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-15 16:13:41,338 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-15 16:13:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:41,338 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-15 16:13:41,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-15 16:13:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:41,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:41,339 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:41,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:41,548 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:41,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-15 16:13:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:41,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900160333] [2020-10-15 16:13:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900160333] [2020-10-15 16:13:41,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121584703] [2020-10-15 16:13:41,615 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 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 [2020-10-15 16:13:41,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:41,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:41,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:41,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:41,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:41,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079050851] [2020-10-15 16:13:41,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:41,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:41,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:41,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:41,767 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-15 16:13:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:41,816 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-15 16:13:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:41,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:41,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:41,817 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:13:41,817 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:13:41,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:13:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-15 16:13:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 16:13:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-15 16:13:41,821 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-15 16:13:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:41,821 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-15 16:13:41,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-15 16:13:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:41,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:41,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:42,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 16:13:42,031 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-15 16:13:42,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:42,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709838028] [2020-10-15 16:13:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709838028] [2020-10-15 16:13:42,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710307519] [2020-10-15 16:13:42,099 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 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 [2020-10-15 16:13:42,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:42,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:42,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:42,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767575413] [2020-10-15 16:13:42,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:42,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:42,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:42,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:42,256 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-15 16:13:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:42,365 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-15 16:13:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:42,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:42,366 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:13:42,366 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:13:42,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:13:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-15 16:13:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 16:13:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-15 16:13:42,370 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-15 16:13:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:42,370 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-15 16:13:42,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-15 16:13:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:42,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:42,371 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:42,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 16:13:42,580 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:42,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:42,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-15 16:13:42,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:42,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369857533] [2020-10-15 16:13:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369857533] [2020-10-15 16:13:42,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784401882] [2020-10-15 16:13:42,639 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 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 [2020-10-15 16:13:42,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:42,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:42,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:42,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:42,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128347146] [2020-10-15 16:13:42,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:42,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:42,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:42,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:42,759 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-15 16:13:42,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:42,878 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 16:13:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:42,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:42,880 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:13:42,880 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:13:42,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:42,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:13:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-15 16:13:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 16:13:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-15 16:13:42,885 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-15 16:13:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:42,885 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-15 16:13:42,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-15 16:13:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:42,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:42,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:43,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:43,096 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:43,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-15 16:13:43,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:43,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279358587] [2020-10-15 16:13:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279358587] [2020-10-15 16:13:43,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423757612] [2020-10-15 16:13:43,167 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 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 [2020-10-15 16:13:43,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:13:43,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:43,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:43,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:43,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129391310] [2020-10-15 16:13:43,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:43,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:43,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:43,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:43,298 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:43,409 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-15 16:13:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:43,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:43,411 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:13:43,411 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:13:43,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:13:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-15 16:13:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 16:13:43,415 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 16:13:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:43,416 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 16:13:43,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 16:13:43,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:43,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:43,417 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:43,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 16:13:43,618 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:43,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-15 16:13:43,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:43,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429473907] [2020-10-15 16:13:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429473907] [2020-10-15 16:13:43,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262541622] [2020-10-15 16:13:43,692 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 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 [2020-10-15 16:13:43,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:43,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:43,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:43,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:43,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:43,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326779840] [2020-10-15 16:13:43,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:43,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:43,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:43,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:43,813 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 16:13:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:43,937 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-15 16:13:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:43,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:43,939 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:13:43,939 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:13:43,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:13:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-15 16:13:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-15 16:13:43,943 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-15 16:13:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:43,944 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-15 16:13:43,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-15 16:13:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:43,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:43,959 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:44,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:44,170 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-15 16:13:44,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:44,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186993657] [2020-10-15 16:13:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186993657] [2020-10-15 16:13:44,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488780846] [2020-10-15 16:13:44,252 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 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 [2020-10-15 16:13:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:44,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:44,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:44,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:44,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834045573] [2020-10-15 16:13:44,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:44,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:44,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:44,378 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-15 16:13:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:44,445 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-15 16:13:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:44,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:44,447 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:13:44,447 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:13:44,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:13:44,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-15 16:13:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:13:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-15 16:13:44,451 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-15 16:13:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:44,451 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-15 16:13:44,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-15 16:13:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:44,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:44,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:44,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 16:13:44,652 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:44,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:44,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-15 16:13:44,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:44,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375301035] [2020-10-15 16:13:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375301035] [2020-10-15 16:13:44,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048202168] [2020-10-15 16:13:44,735 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 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 [2020-10-15 16:13:44,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:44,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:44,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:44,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:44,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:44,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987504115] [2020-10-15 16:13:44,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:44,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:44,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:44,869 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-15 16:13:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:44,990 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-15 16:13:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:44,990 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:44,991 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:13:44,991 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:13:44,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:44,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:13:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-15 16:13:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 16:13:44,995 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 16:13:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:44,995 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 16:13:44,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 16:13:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:44,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:44,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:45,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-15 16:13:45,205 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:45,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:45,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-15 16:13:45,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:45,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881223594] [2020-10-15 16:13:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881223594] [2020-10-15 16:13:45,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281001098] [2020-10-15 16:13:45,265 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 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 [2020-10-15 16:13:45,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:45,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:45,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:45,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:45,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:45,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190696244] [2020-10-15 16:13:45,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:45,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:45,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:45,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:45,408 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 16:13:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:45,557 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:13:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:45,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:45,559 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:13:45,559 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:13:45,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:13:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-15 16:13:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 16:13:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-15 16:13:45,564 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-15 16:13:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:45,565 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-15 16:13:45,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:45,565 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-15 16:13:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:45,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:45,566 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:45,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 16:13:45,774 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-15 16:13:45,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:45,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587335356] [2020-10-15 16:13:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587335356] [2020-10-15 16:13:45,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146112927] [2020-10-15 16:13:45,847 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 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 [2020-10-15 16:13:45,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:45,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:45,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:45,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:45,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:45,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578078508] [2020-10-15 16:13:45,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:45,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:45,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:45,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:45,975 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-15 16:13:46,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:46,047 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 16:13:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:46,048 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:46,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:46,049 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:13:46,049 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:13:46,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:13:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-15 16:13:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 16:13:46,053 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 16:13:46,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:46,053 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 16:13:46,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 16:13:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:46,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:46,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:46,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-15 16:13:46,265 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:46,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-15 16:13:46,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:46,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633738360] [2020-10-15 16:13:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633738360] [2020-10-15 16:13:46,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047703461] [2020-10-15 16:13:46,326 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 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 [2020-10-15 16:13:46,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:46,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:46,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:46,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:46,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255887256] [2020-10-15 16:13:46,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:46,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:46,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:46,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:46,467 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:46,617 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-15 16:13:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:46,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:46,618 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:13:46,619 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:13:46,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:13:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-15 16:13:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-15 16:13:46,624 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-15 16:13:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:46,624 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-15 16:13:46,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-15 16:13:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:46,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:46,625 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:46,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:46,834 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-15 16:13:46,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:46,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887846409] [2020-10-15 16:13:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887846409] [2020-10-15 16:13:46,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876198333] [2020-10-15 16:13:46,904 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 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 [2020-10-15 16:13:46,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:46,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:46,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:46,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:47,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:47,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191408723] [2020-10-15 16:13:47,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:47,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:47,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:47,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:47,045 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-15 16:13:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:47,155 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-15 16:13:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:47,156 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:47,157 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:13:47,158 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:13:47,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:13:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-15 16:13:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:47,161 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:47,162 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:47,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:47,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:47,162 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:47,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 16:13:47,371 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:47,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-15 16:13:47,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:47,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102381047] [2020-10-15 16:13:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102381047] [2020-10-15 16:13:47,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050802233] [2020-10-15 16:13:47,425 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 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 [2020-10-15 16:13:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:47,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:47,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:47,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:47,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:47,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431077016] [2020-10-15 16:13:47,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:47,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:47,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:47,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:47,576 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:47,799 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-15 16:13:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:47,800 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:47,801 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:13:47,802 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:13:47,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:13:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 16:13:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:13:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-15 16:13:47,805 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-15 16:13:47,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:47,805 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-15 16:13:47,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:47,806 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-15 16:13:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:47,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:47,806 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:48,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 16:13:48,011 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-15 16:13:48,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:48,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531441363] [2020-10-15 16:13:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531441363] [2020-10-15 16:13:48,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068212843] [2020-10-15 16:13:48,064 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 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 [2020-10-15 16:13:48,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:48,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:48,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:48,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:48,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400821640] [2020-10-15 16:13:48,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:48,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:48,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:48,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:48,207 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-15 16:13:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:48,356 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:13:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:48,357 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:48,358 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:13:48,358 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:13:48,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:13:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-15 16:13:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:48,365 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:48,365 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:48,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:48,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:48,367 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:48,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:48,578 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:48,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-15 16:13:48,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:48,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528331080] [2020-10-15 16:13:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528331080] [2020-10-15 16:13:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180160256] [2020-10-15 16:13:48,633 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 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 [2020-10-15 16:13:48,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:48,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:48,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:48,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:48,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:48,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:48,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574479797] [2020-10-15 16:13:48,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:48,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:48,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:48,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:48,799 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:49,121 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-15 16:13:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:49,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:49,123 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:13:49,123 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 16:13:49,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:13:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 16:13:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-15 16:13:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:49,128 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:49,128 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:49,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:49,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:49,129 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:49,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-15 16:13:49,329 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:49,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-15 16:13:49,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:49,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031407822] [2020-10-15 16:13:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031407822] [2020-10-15 16:13:49,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536458949] [2020-10-15 16:13:49,383 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 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 [2020-10-15 16:13:49,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:49,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:49,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:49,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864612867] [2020-10-15 16:13:49,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:49,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:49,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:49,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:49,533 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:49,812 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-15 16:13:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:49,813 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:49,815 INFO L225 Difference]: With dead ends: 166 [2020-10-15 16:13:49,815 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:13:49,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:13:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-15 16:13:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-15 16:13:49,820 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-15 16:13:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:49,821 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-15 16:13:49,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:49,821 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-15 16:13:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:49,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:49,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:50,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:50,034 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:50,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-15 16:13:50,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:50,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751426737] [2020-10-15 16:13:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751426737] [2020-10-15 16:13:50,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848240679] [2020-10-15 16:13:50,130 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 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 [2020-10-15 16:13:50,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:50,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:50,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:50,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:50,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:50,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47194811] [2020-10-15 16:13:50,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:50,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:50,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:50,314 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-15 16:13:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:50,553 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-15 16:13:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:50,553 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:50,555 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:13:50,555 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:13:50,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:13:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-15 16:13:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 16:13:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-15 16:13:50,558 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-15 16:13:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:50,558 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-15 16:13:50,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-15 16:13:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:50,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:50,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:50,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 16:13:50,768 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:50,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:50,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-15 16:13:50,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:50,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689546754] [2020-10-15 16:13:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689546754] [2020-10-15 16:13:50,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929770032] [2020-10-15 16:13:50,837 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 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 [2020-10-15 16:13:50,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:50,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:50,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:50,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:50,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593636153] [2020-10-15 16:13:50,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:50,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:50,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:50,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:50,970 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:51,207 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-15 16:13:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:51,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:51,209 INFO L225 Difference]: With dead ends: 170 [2020-10-15 16:13:51,209 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 16:13:51,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:13:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 16:13:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-15 16:13:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 16:13:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-15 16:13:51,213 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-15 16:13:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:51,214 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-15 16:13:51,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-15 16:13:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:51,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:51,214 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:51,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,415 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:51,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:51,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-15 16:13:51,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:51,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498961357] [2020-10-15 16:13:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498961357] [2020-10-15 16:13:51,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202605424] [2020-10-15 16:13:51,471 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 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 [2020-10-15 16:13:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:51,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:51,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:51,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:51,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849187987] [2020-10-15 16:13:51,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:51,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:51,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:51,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:51,591 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-15 16:13:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:51,866 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-15 16:13:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:51,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:51,868 INFO L225 Difference]: With dead ends: 177 [2020-10-15 16:13:51,868 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:13:51,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:13:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:13:51,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-15 16:13:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-15 16:13:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-15 16:13:51,871 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-15 16:13:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:51,872 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-15 16:13:51,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-15 16:13:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:51,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:51,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:52,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 16:13:52,073 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:52,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:52,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-15 16:13:52,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:52,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394227523] [2020-10-15 16:13:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394227523] [2020-10-15 16:13:52,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188748607] [2020-10-15 16:13:52,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 16:13:52,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:52,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:52,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:52,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:52,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:52,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:52,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675925559] [2020-10-15 16:13:52,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:52,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:52,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:52,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:52,239 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-15 16:13:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:52,589 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-15 16:13:52,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:13:52,590 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:52,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:52,591 INFO L225 Difference]: With dead ends: 190 [2020-10-15 16:13:52,592 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 16:13:52,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:13:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 16:13:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-15 16:13:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-15 16:13:52,595 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-15 16:13:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:52,595 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-15 16:13:52,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-15 16:13:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:52,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:52,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:52,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 16:13:52,796 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:52,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-15 16:13:52,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:52,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762762922] [2020-10-15 16:13:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762762922] [2020-10-15 16:13:52,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516663118] [2020-10-15 16:13:52,849 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:52,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:13:52,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:52,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:13:52,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:52,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-15 16:13:52,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212800265] [2020-10-15 16:13:52,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:13:52,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:52,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:13:52,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:52,935 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 12 states. [2020-10-15 16:13:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:53,272 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-10-15 16:13:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:13:53,272 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-10-15 16:13:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:53,274 INFO L225 Difference]: With dead ends: 177 [2020-10-15 16:13:53,274 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:13:53,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:13:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:13:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2020-10-15 16:13:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-15 16:13:53,276 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-15 16:13:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:53,277 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-15 16:13:53,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:13:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-15 16:13:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:53,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:53,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:53,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 16:13:53,478 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:53,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-15 16:13:53,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:53,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621562487] [2020-10-15 16:13:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621562487] [2020-10-15 16:13:53,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348269170] [2020-10-15 16:13:53,540 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:53,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:53,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:53,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:53,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:53,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:53,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617242528] [2020-10-15 16:13:53,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:53,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:53,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:53,684 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-15 16:13:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:53,822 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-15 16:13:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:53,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:53,824 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:13:53,824 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 16:13:53,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 16:13:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-15 16:13:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-15 16:13:53,827 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-15 16:13:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:53,827 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-15 16:13:53,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-15 16:13:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:53,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:53,828 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:54,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 16:13:54,029 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:54,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-15 16:13:54,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:54,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455308977] [2020-10-15 16:13:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455308977] [2020-10-15 16:13:54,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422207068] [2020-10-15 16:13:54,089 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:54,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:54,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:54,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:54,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:54,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:54,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129863897] [2020-10-15 16:13:54,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:54,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:54,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:54,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:54,215 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-15 16:13:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:54,356 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-15 16:13:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:54,357 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:54,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:54,358 INFO L225 Difference]: With dead ends: 161 [2020-10-15 16:13:54,358 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:13:54,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:13:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-15 16:13:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-15 16:13:54,362 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-15 16:13:54,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:54,363 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-15 16:13:54,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-15 16:13:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:54,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:54,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:54,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 16:13:54,572 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:54,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:54,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-15 16:13:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:54,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975908258] [2020-10-15 16:13:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975908258] [2020-10-15 16:13:54,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812908109] [2020-10-15 16:13:54,628 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:54,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:13:54,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:54,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:54,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:54,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:54,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495915227] [2020-10-15 16:13:54,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:54,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:54,799 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-15 16:13:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:55,020 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-15 16:13:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:55,020 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:55,021 INFO L225 Difference]: With dead ends: 165 [2020-10-15 16:13:55,021 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 16:13:55,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 16:13:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-15 16:13:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-15 16:13:55,025 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-15 16:13:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:55,025 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-15 16:13:55,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-15 16:13:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:55,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:55,026 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:55,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-15 16:13:55,234 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:55,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-15 16:13:55,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:55,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308881585] [2020-10-15 16:13:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308881585] [2020-10-15 16:13:55,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763341856] [2020-10-15 16:13:55,288 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:55,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:55,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73469752] [2020-10-15 16:13:55,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:55,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:55,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:55,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:55,469 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-15 16:13:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:55,724 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-15 16:13:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:55,725 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:55,727 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:13:55,727 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:13:55,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:13:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-15 16:13:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 16:13:55,732 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 16:13:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:55,733 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 16:13:55,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 16:13:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:55,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:55,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:55,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,946 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:55,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:55,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-15 16:13:55,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:55,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475133259] [2020-10-15 16:13:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475133259] [2020-10-15 16:13:56,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50501980] [2020-10-15 16:13:56,033 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:56,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:56,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:56,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:56,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867448024] [2020-10-15 16:13:56,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:56,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:56,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:56,153 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:56,383 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-15 16:13:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:56,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:56,385 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:13:56,385 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:13:56,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:13:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:13:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-15 16:13:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 16:13:56,388 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 16:13:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:56,388 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 16:13:56,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 16:13:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:56,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:56,389 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:56,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,590 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:56,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-15 16:13:56,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:56,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245722937] [2020-10-15 16:13:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245722937] [2020-10-15 16:13:56,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083685365] [2020-10-15 16:13:56,644 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:56,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:56,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:56,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:56,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:56,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:56,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882840402] [2020-10-15 16:13:56,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:56,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:56,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:56,752 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 16:13:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:56,936 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-15 16:13:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:56,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:56,939 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:13:56,939 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:13:56,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:13:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-15 16:13:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 16:13:56,943 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 16:13:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:56,944 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 16:13:56,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 16:13:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:56,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:56,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:57,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,156 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-15 16:13:57,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:57,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672784853] [2020-10-15 16:13:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672784853] [2020-10-15 16:13:57,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429999732] [2020-10-15 16:13:57,215 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:57,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:57,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:57,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:57,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369864755] [2020-10-15 16:13:57,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:57,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:57,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:57,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:57,372 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:57,688 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-15 16:13:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:57,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:57,691 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:13:57,691 INFO L226 Difference]: Without dead ends: 181 [2020-10-15 16:13:57,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:13:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-15 16:13:57,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-15 16:13:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 16:13:57,694 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 16:13:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:57,695 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 16:13:57,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 16:13:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:57,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:57,695 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:57,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,898 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:57,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-15 16:13:57,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:57,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037196920] [2020-10-15 16:13:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037196920] [2020-10-15 16:13:57,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595094435] [2020-10-15 16:13:57,953 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:57,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:57,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:58,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:58,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731727100] [2020-10-15 16:13:58,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:58,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:58,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:58,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:58,068 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:58,295 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-15 16:13:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:58,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:58,297 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:13:58,297 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:13:58,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:13:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:13:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-15 16:13:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 16:13:58,301 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 16:13:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:58,301 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 16:13:58,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 16:13:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:58,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:58,302 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:58,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-15 16:13:58,511 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-15 16:13:58,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:58,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843921930] [2020-10-15 16:13:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843921930] [2020-10-15 16:13:58,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542797578] [2020-10-15 16:13:58,564 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:58,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:58,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:58,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:58,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:58,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:58,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490550092] [2020-10-15 16:13:58,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:58,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:58,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:58,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:58,673 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 16:13:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:58,996 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-15 16:13:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:13:58,997 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:58,998 INFO L225 Difference]: With dead ends: 192 [2020-10-15 16:13:58,998 INFO L226 Difference]: Without dead ends: 184 [2020-10-15 16:13:58,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:13:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-15 16:13:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-15 16:13:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 16:13:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-15 16:13:59,002 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-15 16:13:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:59,002 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-15 16:13:59,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-15 16:13:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:59,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:59,003 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:59,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:59,208 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:59,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:59,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-15 16:13:59,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:59,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722469877] [2020-10-15 16:13:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722469877] [2020-10-15 16:13:59,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253258179] [2020-10-15 16:13:59,261 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:59,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:59,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:59,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:59,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575405417] [2020-10-15 16:13:59,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:59,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:59,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:59,379 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-15 16:13:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:59,686 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-15 16:13:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:59,686 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:59,688 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:13:59,688 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 16:13:59,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:13:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 16:13:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-15 16:13:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:13:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-15 16:13:59,691 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-15 16:13:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:59,691 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-15 16:13:59,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-15 16:13:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:59,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:59,692 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:59,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-15 16:13:59,893 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-15 16:13:59,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:59,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220089821] [2020-10-15 16:13:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220089821] [2020-10-15 16:13:59,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592343130] [2020-10-15 16:13:59,967 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:00,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:00,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:00,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:00,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:00,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:00,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:14:00,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130205491] [2020-10-15 16:14:00,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:14:00,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:00,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:14:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:00,118 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-15 16:14:00,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:00,261 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-15 16:14:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:00,261 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-15 16:14:00,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:00,263 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:14:00,263 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:14:00,263 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 [2020-10-15 16:14:00,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:14:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 16:14:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:14:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-15 16:14:00,267 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-15 16:14:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:00,268 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-15 16:14:00,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:14:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-15 16:14:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:00,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:00,269 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:00,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:00,472 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:00,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:00,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-15 16:14:00,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:00,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326725628] [2020-10-15 16:14:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:00,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326725628] [2020-10-15 16:14:00,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13517118] [2020-10-15 16:14:00,597 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:00,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:00,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:00,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:00,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:00,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:00,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:00,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837607655] [2020-10-15 16:14:00,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:00,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:00,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:00,754 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-15 16:14:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:00,801 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:14:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:14:00,802 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:00,803 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:14:00,803 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:14:00,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:14:00,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-15 16:14:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 16:14:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 16:14:00,808 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 16:14:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:00,808 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 16:14:00,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:00,808 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 16:14:00,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:00,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:00,809 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:01,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 16:14:01,020 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-15 16:14:01,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:01,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949607124] [2020-10-15 16:14:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949607124] [2020-10-15 16:14:01,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952041199] [2020-10-15 16:14:01,118 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:01,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:01,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:01,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:01,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515606370] [2020-10-15 16:14:01,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:01,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:01,276 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 16:14:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:01,335 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-15 16:14:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:01,335 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:01,336 INFO L225 Difference]: With dead ends: 170 [2020-10-15 16:14:01,337 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:14:01,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:01,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:14:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-15 16:14:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 16:14:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 16:14:01,340 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 16:14:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:01,340 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 16:14:01,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 16:14:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:01,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:01,341 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:01,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,548 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-15 16:14:01,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:01,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42149576] [2020-10-15 16:14:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42149576] [2020-10-15 16:14:01,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299701303] [2020-10-15 16:14:01,641 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:01,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:01,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:01,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:01,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:01,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727412184] [2020-10-15 16:14:01,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:01,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:01,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:01,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:01,838 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 16:14:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:01,913 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-15 16:14:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:01,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:01,915 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:14:01,915 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:14:01,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:14:01,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:14:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-15 16:14:01,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 16:14:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-15 16:14:01,918 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-15 16:14:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:01,918 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-15 16:14:01,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-15 16:14:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:01,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:01,919 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:02,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,120 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:02,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:02,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-15 16:14:02,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:02,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001078492] [2020-10-15 16:14:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001078492] [2020-10-15 16:14:02,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310063018] [2020-10-15 16:14:02,198 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:14:02,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:02,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:02,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:02,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684430632] [2020-10-15 16:14:02,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:02,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:02,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:02,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:02,344 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-15 16:14:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:02,441 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-15 16:14:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:02,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:02,443 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:14:02,443 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:14:02,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:14:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:14:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-15 16:14:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 16:14:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-15 16:14:02,447 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-15 16:14:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:02,447 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-15 16:14:02,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-15 16:14:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:02,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:02,448 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:02,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-15 16:14:02,649 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:02,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-15 16:14:02,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:02,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943713423] [2020-10-15 16:14:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943713423] [2020-10-15 16:14:02,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082588950] [2020-10-15 16:14:02,724 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:02,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:02,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:02,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017493399] [2020-10-15 16:14:02,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:02,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:02,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:02,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:02,878 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-15 16:14:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:03,004 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-15 16:14:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:03,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:03,006 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:14:03,006 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 16:14:03,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 16:14:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-15 16:14:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 16:14:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-15 16:14:03,009 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-15 16:14:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:03,009 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-15 16:14:03,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-15 16:14:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:03,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:03,010 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:03,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,213 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:03,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-15 16:14:03,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:03,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833896329] [2020-10-15 16:14:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833896329] [2020-10-15 16:14:03,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672991158] [2020-10-15 16:14:03,287 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:03,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:03,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:03,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:03,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:03,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:03,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855425837] [2020-10-15 16:14:03,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:03,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:03,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:03,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:03,441 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-15 16:14:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:03,622 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-15 16:14:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:03,622 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:03,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:03,624 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:14:03,624 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:14:03,624 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 [2020-10-15 16:14:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:14:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-15 16:14:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 16:14:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-15 16:14:03,627 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-15 16:14:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:03,628 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-15 16:14:03,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-15 16:14:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:03,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:03,628 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:03,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,829 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:03,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:03,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-15 16:14:03,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:03,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108422032] [2020-10-15 16:14:03,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108422032] [2020-10-15 16:14:03,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149689362] [2020-10-15 16:14:03,908 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:03,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:03,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:04,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:04,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115684303] [2020-10-15 16:14:04,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:04,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:04,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:04,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:04,099 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-15 16:14:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:04,146 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-15 16:14:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:14:04,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:04,148 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:14:04,148 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:14:04,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:14:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-15 16:14:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 16:14:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-15 16:14:04,151 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-15 16:14:04,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:04,152 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-15 16:14:04,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-15 16:14:04,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:04,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:04,153 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:04,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-15 16:14:04,353 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:04,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-15 16:14:04,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:04,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751164489] [2020-10-15 16:14:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751164489] [2020-10-15 16:14:04,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284437054] [2020-10-15 16:14:04,459 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:04,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:04,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:04,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:04,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:04,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540070770] [2020-10-15 16:14:04,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:04,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:04,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:04,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:04,684 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:04,875 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-15 16:14:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:04,876 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:04,878 INFO L225 Difference]: With dead ends: 172 [2020-10-15 16:14:04,878 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:14:04,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:04,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:14:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-15 16:14:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 16:14:04,884 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 16:14:04,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:04,884 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 16:14:04,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:04,884 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 16:14:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:04,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:04,885 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:05,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,099 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:05,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-15 16:14:05,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:05,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351423610] [2020-10-15 16:14:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351423610] [2020-10-15 16:14:05,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2469263] [2020-10-15 16:14:05,181 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:05,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:05,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:05,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:05,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775580928] [2020-10-15 16:14:05,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:05,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:05,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:05,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:05,377 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:05,561 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 16:14:05,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:05,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:05,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:05,563 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:05,563 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:05,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-15 16:14:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 16:14:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-15 16:14:05,571 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-15 16:14:05,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:05,571 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-15 16:14:05,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-15 16:14:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:05,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:05,572 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:05,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-15 16:14:05,781 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:05,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:05,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-15 16:14:05,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:05,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742106259] [2020-10-15 16:14:05,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742106259] [2020-10-15 16:14:05,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757083372] [2020-10-15 16:14:05,857 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:05,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:05,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:05,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:06,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:06,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138342591] [2020-10-15 16:14:06,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:06,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:06,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:06,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:06,005 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-15 16:14:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:06,178 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 16:14:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:06,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:06,180 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:06,180 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:06,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-15 16:14:06,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 16:14:06,183 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 16:14:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:06,183 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 16:14:06,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 16:14:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:06,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:06,184 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:06,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 16:14:06,392 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:06,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-15 16:14:06,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:06,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158694125] [2020-10-15 16:14:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158694125] [2020-10-15 16:14:06,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394631527] [2020-10-15 16:14:06,468 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:06,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:06,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:06,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:06,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:06,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089704134] [2020-10-15 16:14:06,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:06,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:06,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:06,608 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:06,798 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-15 16:14:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:06,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:06,800 INFO L225 Difference]: With dead ends: 184 [2020-10-15 16:14:06,800 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 16:14:06,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 16:14:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-15 16:14:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-15 16:14:06,803 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-15 16:14:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:06,803 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-15 16:14:06,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-15 16:14:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:06,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:06,804 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:07,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-15 16:14:07,005 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-15 16:14:07,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:07,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322429988] [2020-10-15 16:14:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322429988] [2020-10-15 16:14:07,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967990686] [2020-10-15 16:14:07,083 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:07,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:07,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:07,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748610352] [2020-10-15 16:14:07,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:07,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:07,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:07,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:07,239 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-15 16:14:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:07,434 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-15 16:14:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:07,435 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:07,436 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:07,436 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:07,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-15 16:14:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 16:14:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-15 16:14:07,439 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-15 16:14:07,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:07,439 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-15 16:14:07,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-15 16:14:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:07,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:07,440 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:07,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:07,642 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:07,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:07,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-15 16:14:07,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:07,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303525018] [2020-10-15 16:14:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303525018] [2020-10-15 16:14:07,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089243855] [2020-10-15 16:14:07,735 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:07,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:07,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:07,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:07,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294655759] [2020-10-15 16:14:07,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:07,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:07,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:07,921 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-15 16:14:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:08,072 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-15 16:14:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:08,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:08,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:08,074 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:14:08,074 INFO L226 Difference]: Without dead ends: 174 [2020-10-15 16:14:08,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-15 16:14:08,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-15 16:14:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-15 16:14:08,078 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-15 16:14:08,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:08,078 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-15 16:14:08,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:08,078 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-15 16:14:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:08,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:08,079 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:08,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,279 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:08,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-15 16:14:08,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:08,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893804367] [2020-10-15 16:14:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893804367] [2020-10-15 16:14:08,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090745648] [2020-10-15 16:14:08,362 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:08,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:08,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:08,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:08,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479251168] [2020-10-15 16:14:08,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:08,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:08,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:08,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:08,519 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:08,713 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 16:14:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:08,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:08,715 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:08,715 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:08,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-15 16:14:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-15 16:14:08,720 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-15 16:14:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:08,722 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-15 16:14:08,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-15 16:14:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:08,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:08,724 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:08,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,934 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:08,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-15 16:14:08,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:08,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843852738] [2020-10-15 16:14:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843852738] [2020-10-15 16:14:09,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034597034] [2020-10-15 16:14:09,014 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:09,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:09,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:09,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:09,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:09,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849252583] [2020-10-15 16:14:09,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:09,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:09,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:09,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:09,170 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-15 16:14:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:09,353 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 16:14:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:09,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:09,354 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:09,354 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:09,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-15 16:14:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 16:14:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-15 16:14:09,359 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-15 16:14:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:09,359 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-15 16:14:09,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-15 16:14:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:09,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:09,360 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:09,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,567 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:09,568 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-15 16:14:09,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:09,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134169376] [2020-10-15 16:14:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134169376] [2020-10-15 16:14:09,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065808839] [2020-10-15 16:14:09,681 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:09,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:09,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:09,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:09,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721586603] [2020-10-15 16:14:09,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:09,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:09,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:09,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:09,829 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-15 16:14:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:09,889 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-15 16:14:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:09,890 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:09,891 INFO L225 Difference]: With dead ends: 182 [2020-10-15 16:14:09,891 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 16:14:09,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:09,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 16:14:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-15 16:14:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-15 16:14:09,896 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-15 16:14:09,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:09,896 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-15 16:14:09,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-15 16:14:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:09,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:09,897 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:10,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-15 16:14:10,108 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-15 16:14:10,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:10,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100934044] [2020-10-15 16:14:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100934044] [2020-10-15 16:14:10,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031507181] [2020-10-15 16:14:10,208 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:10,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:10,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:10,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:10,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:10,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358207747] [2020-10-15 16:14:10,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:10,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:10,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:10,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:10,373 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-15 16:14:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:10,539 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-15 16:14:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:10,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:10,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:10,541 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:10,541 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:10,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-15 16:14:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 16:14:10,545 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 16:14:10,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:10,545 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 16:14:10,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 16:14:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:10,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:10,546 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:10,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,747 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-15 16:14:10,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:10,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965520937] [2020-10-15 16:14:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965520937] [2020-10-15 16:14:10,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138045807] [2020-10-15 16:14:10,832 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:10,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:10,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:11,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:11,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53280170] [2020-10-15 16:14:11,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:11,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:11,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:11,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:11,008 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:11,228 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-15 16:14:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:11,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:11,230 INFO L225 Difference]: With dead ends: 191 [2020-10-15 16:14:11,230 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 16:14:11,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 16:14:11,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-15 16:14:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-15 16:14:11,233 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-15 16:14:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:11,233 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-15 16:14:11,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-15 16:14:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:11,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:11,234 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:11,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:11,443 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:11,443 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-15 16:14:11,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:11,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325397072] [2020-10-15 16:14:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325397072] [2020-10-15 16:14:11,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615959423] [2020-10-15 16:14:11,516 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:11,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:11,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:11,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:11,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:11,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566202083] [2020-10-15 16:14:11,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:11,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:11,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:11,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:11,665 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:11,880 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-15 16:14:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:11,881 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:11,882 INFO L225 Difference]: With dead ends: 187 [2020-10-15 16:14:11,883 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 16:14:11,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 16:14:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-15 16:14:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 16:14:11,887 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 16:14:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:11,888 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 16:14:11,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 16:14:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:11,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:11,888 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:12,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-15 16:14:12,089 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:12,090 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-15 16:14:12,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:12,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362018343] [2020-10-15 16:14:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362018343] [2020-10-15 16:14:12,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32435074] [2020-10-15 16:14:12,163 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:12,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:12,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:12,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581024969] [2020-10-15 16:14:12,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:12,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:12,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:12,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:12,299 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:12,530 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-15 16:14:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:12,530 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:12,532 INFO L225 Difference]: With dead ends: 198 [2020-10-15 16:14:12,532 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:14:12,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:14:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-15 16:14:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-15 16:14:12,535 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-15 16:14:12,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:12,535 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-15 16:14:12,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-15 16:14:12,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:12,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:12,536 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:12,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,737 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-15 16:14:12,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:12,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495488315] [2020-10-15 16:14:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495488315] [2020-10-15 16:14:12,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209860914] [2020-10-15 16:14:12,824 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:12,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:12,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:12,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:12,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:12,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518424291] [2020-10-15 16:14:12,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:12,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:12,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:12,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:12,980 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-15 16:14:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:13,229 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-15 16:14:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:13,230 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:13,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:13,231 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:13,232 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 16:14:13,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:13,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 16:14:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-15 16:14:13,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-15 16:14:13,235 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-15 16:14:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:13,235 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-15 16:14:13,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-15 16:14:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:13,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:13,236 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:13,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-15 16:14:13,437 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:13,437 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-15 16:14:13,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:13,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898707241] [2020-10-15 16:14:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:13,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898707241] [2020-10-15 16:14:13,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73121125] [2020-10-15 16:14:13,533 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:13,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:13,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:13,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:13,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:13,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:13,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:13,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535933602] [2020-10-15 16:14:13,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:13,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:13,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:13,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:13,678 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-15 16:14:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:13,763 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-15 16:14:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:13,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:13,765 INFO L225 Difference]: With dead ends: 178 [2020-10-15 16:14:13,765 INFO L226 Difference]: Without dead ends: 176 [2020-10-15 16:14:13,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:14:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-15 16:14:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-15 16:14:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-15 16:14:13,768 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-15 16:14:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:13,768 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-15 16:14:13,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-15 16:14:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:13,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:13,768 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:13,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:13,969 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:13,970 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-15 16:14:13,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:13,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794282406] [2020-10-15 16:14:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794282406] [2020-10-15 16:14:14,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848669798] [2020-10-15 16:14:14,057 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:14,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:14,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:14,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:14,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:14,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:14,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361868865] [2020-10-15 16:14:14,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:14,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:14,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:14,212 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-15 16:14:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:14,401 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-15 16:14:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:14,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:14,403 INFO L225 Difference]: With dead ends: 193 [2020-10-15 16:14:14,403 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 16:14:14,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 16:14:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-15 16:14:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-15 16:14:14,406 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-15 16:14:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:14,406 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-15 16:14:14,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-15 16:14:14,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:14,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:14,407 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:14,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-15 16:14:14,608 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:14,609 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-15 16:14:14,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:14,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865048539] [2020-10-15 16:14:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865048539] [2020-10-15 16:14:14,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168277153] [2020-10-15 16:14:14,681 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:14,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:14,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:14,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588775534] [2020-10-15 16:14:14,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:14,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:14,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:14,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:14,859 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-15 16:14:15,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:15,110 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 16:14:15,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:15,110 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:15,112 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:15,112 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:14:15,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:15,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:14:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-15 16:14:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-15 16:14:15,115 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-15 16:14:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:15,115 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-15 16:14:15,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-15 16:14:15,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:15,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:15,116 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:15,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:15,320 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:15,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:15,321 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-15 16:14:15,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:15,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539303007] [2020-10-15 16:14:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539303007] [2020-10-15 16:14:15,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923755282] [2020-10-15 16:14:15,410 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:15,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:15,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:15,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:15,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563443417] [2020-10-15 16:14:15,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:15,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:15,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:15,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:15,569 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-15 16:14:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:15,673 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-15 16:14:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:15,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:15,675 INFO L225 Difference]: With dead ends: 174 [2020-10-15 16:14:15,675 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:14:15,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:14:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:14:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-15 16:14:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-15 16:14:15,678 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-15 16:14:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:15,678 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-15 16:14:15,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-15 16:14:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:15,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:15,679 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:15,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-15 16:14:15,880 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:15,881 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-15 16:14:15,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:15,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217505327] [2020-10-15 16:14:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217505327] [2020-10-15 16:14:15,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846675795] [2020-10-15 16:14:15,956 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:15,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:16,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:16,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832729602] [2020-10-15 16:14:16,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:16,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:16,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:16,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:16,106 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-15 16:14:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:16,325 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-15 16:14:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:16,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:16,327 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:16,327 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 16:14:16,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 16:14:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-15 16:14:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-15 16:14:16,331 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-15 16:14:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:16,331 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-15 16:14:16,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-15 16:14:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:16,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:16,332 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:16,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,541 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:16,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:16,542 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-15 16:14:16,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:16,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064217482] [2020-10-15 16:14:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064217482] [2020-10-15 16:14:16,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484208149] [2020-10-15 16:14:16,649 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:16,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:16,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:16,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:16,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:16,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477119248] [2020-10-15 16:14:16,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:16,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:16,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:16,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:16,813 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:16,932 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-15 16:14:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:16,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:16,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:16,933 INFO L225 Difference]: With dead ends: 175 [2020-10-15 16:14:16,933 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 16:14:16,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 16:14:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-15 16:14:16,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:16,938 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:16,938 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:16,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:16,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:16,939 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:17,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,147 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:17,147 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-15 16:14:17,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:17,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086651571] [2020-10-15 16:14:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086651571] [2020-10-15 16:14:17,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925430693] [2020-10-15 16:14:17,216 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:17,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:17,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:17,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:17,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:17,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094581763] [2020-10-15 16:14:17,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:17,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:17,387 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:17,696 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-15 16:14:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:17,696 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:17,697 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:17,697 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 16:14:17,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 16:14:17,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-15 16:14:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 16:14:17,700 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 16:14:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:17,701 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 16:14:17,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 16:14:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:17,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:17,701 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:17,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,902 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:17,903 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-15 16:14:17,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:17,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090347029] [2020-10-15 16:14:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090347029] [2020-10-15 16:14:17,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591178182] [2020-10-15 16:14:17,969 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:18,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:18,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:18,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:18,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:18,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:18,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069818672] [2020-10-15 16:14:18,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:18,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:18,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:18,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:18,134 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:18,369 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-15 16:14:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:18,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:18,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:18,371 INFO L225 Difference]: With dead ends: 187 [2020-10-15 16:14:18,371 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 16:14:18,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 16:14:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-15 16:14:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:18,375 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:18,375 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:18,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:18,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:18,375 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:18,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:18,576 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-15 16:14:18,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:18,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441929894] [2020-10-15 16:14:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441929894] [2020-10-15 16:14:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116958646] [2020-10-15 16:14:18,644 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:18,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:18,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:18,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:18,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:18,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336600384] [2020-10-15 16:14:18,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:18,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:18,824 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:19,248 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-15 16:14:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:19,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:19,250 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:14:19,250 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:19,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 16:14:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:19,253 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:19,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:19,254 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:19,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:19,254 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:19,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:19,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:19,255 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:19,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-15 16:14:19,462 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:19,462 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-15 16:14:19,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:19,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136397383] [2020-10-15 16:14:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:19,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136397383] [2020-10-15 16:14:19,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357672476] [2020-10-15 16:14:19,531 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:19,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:19,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:19,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:19,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:19,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:19,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:19,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906245688] [2020-10-15 16:14:19,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:19,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:19,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:19,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:19,686 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:19,986 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 16:14:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:19,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:19,989 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:14:19,989 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 16:14:19,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 16:14:19,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-15 16:14:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-15 16:14:19,993 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-15 16:14:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:19,993 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-15 16:14:19,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-15 16:14:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:19,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:19,994 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:20,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:20,200 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-15 16:14:20,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:20,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641203426] [2020-10-15 16:14:20,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:20,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641203426] [2020-10-15 16:14:20,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200951759] [2020-10-15 16:14:20,266 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:20,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:20,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:20,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:20,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:20,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:20,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857021435] [2020-10-15 16:14:20,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:20,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:20,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:20,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:20,917 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-15 16:14:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:21,169 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-15 16:14:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:21,170 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:21,173 INFO L225 Difference]: With dead ends: 198 [2020-10-15 16:14:21,173 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:14:21,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:14:21,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-15 16:14:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 16:14:21,180 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 16:14:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:21,180 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 16:14:21,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 16:14:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:21,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:21,182 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:21,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 16:14:21,383 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-15 16:14:21,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:21,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868255537] [2020-10-15 16:14:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:21,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868255537] [2020-10-15 16:14:21,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035942502] [2020-10-15 16:14:21,451 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:21,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:21,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:21,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:21,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:21,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:21,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:21,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477669353] [2020-10-15 16:14:21,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:21,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:21,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:21,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:21,645 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:22,029 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-15 16:14:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:14:22,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:22,031 INFO L225 Difference]: With dead ends: 209 [2020-10-15 16:14:22,031 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:22,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:14:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 16:14:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:22,035 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:22,035 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:22,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:22,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:22,036 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:22,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 16:14:22,236 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-15 16:14:22,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:22,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494075784] [2020-10-15 16:14:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:22,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494075784] [2020-10-15 16:14:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034107552] [2020-10-15 16:14:22,305 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:22,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:22,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:22,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:22,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:22,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:22,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:22,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989864953] [2020-10-15 16:14:22,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:22,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:22,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:22,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:22,513 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:23,038 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-15 16:14:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:23,038 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:23,040 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:14:23,040 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:14:23,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:14:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:14:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-15 16:14:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:14:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-15 16:14:23,045 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-15 16:14:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:23,045 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-15 16:14:23,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:23,046 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-15 16:14:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:23,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:23,046 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:23,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-15 16:14:23,255 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:23,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:23,255 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-15 16:14:23,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:23,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972554374] [2020-10-15 16:14:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:23,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972554374] [2020-10-15 16:14:23,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106794975] [2020-10-15 16:14:23,338 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:23,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:23,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:23,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:25,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:25,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:25,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:25,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515666702] [2020-10-15 16:14:25,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:25,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:25,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:25,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-15 16:14:25,590 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-15 16:14:29,889 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:14:34,102 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 16:14:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:34,513 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-15 16:14:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:14:34,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:34,515 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:14:34,515 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 16:14:34,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-15 16:14:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 16:14:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-15 16:14:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-15 16:14:34,519 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-15 16:14:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:34,519 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-15 16:14:34,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-15 16:14:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:34,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:34,520 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:34,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 16:14:34,721 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-15 16:14:34,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:34,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805281096] [2020-10-15 16:14:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:34,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805281096] [2020-10-15 16:14:34,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219017064] [2020-10-15 16:14:34,792 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:34,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:34,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:34,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:34,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:34,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:34,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:34,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975225274] [2020-10-15 16:14:34,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:34,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:34,997 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-15 16:14:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:35,506 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-15 16:14:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:35,507 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:35,508 INFO L225 Difference]: With dead ends: 219 [2020-10-15 16:14:35,508 INFO L226 Difference]: Without dead ends: 214 [2020-10-15 16:14:35,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:14:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-15 16:14:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-15 16:14:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-15 16:14:35,512 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-15 16:14:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:35,512 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-15 16:14:35,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-15 16:14:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:35,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:35,513 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:35,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:35,713 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:35,714 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-15 16:14:35,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:35,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247124540] [2020-10-15 16:14:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:35,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247124540] [2020-10-15 16:14:35,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111889363] [2020-10-15 16:14:35,784 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:35,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:35,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:35,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:35,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:35,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:35,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307058976] [2020-10-15 16:14:35,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:35,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:35,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:35,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:35,945 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-15 16:14:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:36,189 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-15 16:14:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:36,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:36,191 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:14:36,191 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 16:14:36,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:36,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 16:14:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-15 16:14:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-15 16:14:36,195 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-15 16:14:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:36,195 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-15 16:14:36,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-15 16:14:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:36,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:36,196 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:36,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:36,399 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:36,399 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-15 16:14:36,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:36,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120130852] [2020-10-15 16:14:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:36,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120130852] [2020-10-15 16:14:36,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233716945] [2020-10-15 16:14:36,470 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:36,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:36,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:36,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:36,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:36,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2907495] [2020-10-15 16:14:36,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:36,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:36,626 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-15 16:14:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:36,878 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-15 16:14:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:36,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:36,879 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:14:36,879 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 16:14:36,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 16:14:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-15 16:14:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-15 16:14:36,882 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-15 16:14:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:36,882 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-15 16:14:36,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-15 16:14:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:36,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:36,883 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:37,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-15 16:14:37,085 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-15 16:14:37,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:37,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236464182] [2020-10-15 16:14:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236464182] [2020-10-15 16:14:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890994473] [2020-10-15 16:14:37,153 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:37,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:37,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:37,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:37,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:37,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:37,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310678812] [2020-10-15 16:14:37,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:37,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:37,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:37,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:37,320 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:37,586 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-15 16:14:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:37,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:37,587 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:14:37,587 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 16:14:37,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 16:14:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-15 16:14:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-15 16:14:37,590 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-15 16:14:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:37,590 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-15 16:14:37,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-15 16:14:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:37,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:37,590 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:37,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 16:14:37,791 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-15 16:14:37,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:37,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668539123] [2020-10-15 16:14:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:37,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668539123] [2020-10-15 16:14:37,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652386255] [2020-10-15 16:14:37,860 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:37,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:37,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:37,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:38,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:38,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:38,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351188445] [2020-10-15 16:14:38,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:38,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:38,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:38,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:38,071 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-15 16:14:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:38,620 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-15 16:14:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:14:38,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:38,622 INFO L225 Difference]: With dead ends: 214 [2020-10-15 16:14:38,623 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:14:38,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:14:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-15 16:14:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-15 16:14:38,628 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-15 16:14:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:38,628 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-15 16:14:38,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-15 16:14:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:38,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:38,629 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:38,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 16:14:38,841 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:38,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:38,842 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-15 16:14:38,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:38,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24075484] [2020-10-15 16:14:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:38,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24075484] [2020-10-15 16:14:38,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285913216] [2020-10-15 16:14:38,944 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:39,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:39,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:39,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:39,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:39,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:39,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581733133] [2020-10-15 16:14:39,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:39,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:39,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:39,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:39,190 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-15 16:14:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:39,558 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-15 16:14:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:39,558 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:39,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:39,559 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:14:39,559 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:14:39,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:14:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:14:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-15 16:14:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 16:14:39,563 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 16:14:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:39,563 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 16:14:39,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 16:14:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:39,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:39,564 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:39,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:39,771 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-15 16:14:39,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:39,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664998494] [2020-10-15 16:14:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:39,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664998494] [2020-10-15 16:14:39,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548900154] [2020-10-15 16:14:39,842 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:39,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:39,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:39,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:39,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:39,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215925155] [2020-10-15 16:14:39,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:39,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:39,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:39,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:39,998 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 16:14:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:40,380 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-15 16:14:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:14:40,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:40,381 INFO L225 Difference]: With dead ends: 211 [2020-10-15 16:14:40,381 INFO L226 Difference]: Without dead ends: 209 [2020-10-15 16:14:40,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-15 16:14:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-15 16:14:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:14:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:14:40,385 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:14:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:40,385 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:14:40,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:14:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:40,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:40,386 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:40,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:40,586 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-15 16:14:40,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:40,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144531281] [2020-10-15 16:14:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:40,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144531281] [2020-10-15 16:14:40,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405370994] [2020-10-15 16:14:40,656 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:40,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:40,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:40,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:40,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:40,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:40,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:40,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7863757] [2020-10-15 16:14:40,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:40,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:40,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:40,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:40,804 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:14:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:41,244 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-15 16:14:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:14:41,245 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:41,245 INFO L225 Difference]: With dead ends: 211 [2020-10-15 16:14:41,245 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:14:41,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:14:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:14:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-15 16:14:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:14:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:14:41,249 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:14:41,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:41,250 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:14:41,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:14:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:41,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:41,250 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:41,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 16:14:41,459 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-15 16:14:41,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:41,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513624545] [2020-10-15 16:14:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:41,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513624545] [2020-10-15 16:14:41,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552161147] [2020-10-15 16:14:41,533 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:41,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:41,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:41,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:41,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:41,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:41,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:41,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:41,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807730200] [2020-10-15 16:14:41,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:41,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:41,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:41,703 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:14:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:42,270 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-15 16:14:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:14:42,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:42,272 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:14:42,272 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 16:14:42,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:14:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 16:14:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-15 16:14:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 16:14:42,276 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 16:14:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:42,276 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 16:14:42,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 16:14:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:42,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:42,276 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:42,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-15 16:14:42,477 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:42,478 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-15 16:14:42,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:42,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96450756] [2020-10-15 16:14:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:42,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96450756] [2020-10-15 16:14:42,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076044058] [2020-10-15 16:14:42,548 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:42,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:42,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:42,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:42,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:42,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:42,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946059562] [2020-10-15 16:14:42,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:42,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:42,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:42,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:42,702 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 16:14:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:43,141 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-15 16:14:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:14:43,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:43,143 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:14:43,143 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:14:43,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:14:43,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:14:43,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-15 16:14:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:14:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:14:43,146 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:14:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:43,147 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:14:43,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:14:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:43,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:43,147 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:43,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:43,351 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-15 16:14:43,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:43,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846339184] [2020-10-15 16:14:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:43,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846339184] [2020-10-15 16:14:43,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833565946] [2020-10-15 16:14:43,425 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:43,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:43,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:43,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:43,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:43,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:43,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:43,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:43,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577551025] [2020-10-15 16:14:43,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:43,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:43,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:43,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:43,572 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:14:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:44,122 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-15 16:14:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:14:44,123 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:44,124 INFO L225 Difference]: With dead ends: 240 [2020-10-15 16:14:44,124 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 16:14:44,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:14:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 16:14:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-15 16:14:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:14:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-15 16:14:44,128 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-15 16:14:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:44,128 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-15 16:14:44,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-15 16:14:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:44,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:44,128 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:44,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 16:14:44,329 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-15 16:14:44,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:44,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045464399] [2020-10-15 16:14:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:44,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045464399] [2020-10-15 16:14:44,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544274058] [2020-10-15 16:14:44,402 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:44,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:44,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:44,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:44,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:44,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:44,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790057551] [2020-10-15 16:14:44,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:44,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:44,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:44,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:44,599 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-15 16:14:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:45,396 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-15 16:14:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:14:45,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:45,398 INFO L225 Difference]: With dead ends: 238 [2020-10-15 16:14:45,398 INFO L226 Difference]: Without dead ends: 230 [2020-10-15 16:14:45,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:14:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-15 16:14:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-15 16:14:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 16:14:45,404 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 16:14:45,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:45,404 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 16:14:45,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 16:14:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:45,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:45,406 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:45,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:45,619 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-15 16:14:45,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:45,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434990904] [2020-10-15 16:14:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:45,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434990904] [2020-10-15 16:14:45,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927329366] [2020-10-15 16:14:45,696 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:45,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:45,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:45,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:45,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:45,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167574154] [2020-10-15 16:14:45,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:45,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:45,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:45,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:45,862 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 16:14:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:46,099 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-15 16:14:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:46,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:46,101 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:46,101 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:14:46,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:14:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-15 16:14:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 16:14:46,104 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 16:14:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:46,104 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 16:14:46,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 16:14:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:46,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:46,105 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:46,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-15 16:14:46,313 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-15 16:14:46,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:46,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302622414] [2020-10-15 16:14:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:46,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302622414] [2020-10-15 16:14:46,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119269255] [2020-10-15 16:14:46,381 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:46,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:46,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:46,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:46,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:46,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:46,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346096130] [2020-10-15 16:14:46,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:46,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:46,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:46,544 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 16:14:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:46,995 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-15 16:14:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:46,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:46,996 INFO L225 Difference]: With dead ends: 206 [2020-10-15 16:14:46,997 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 16:14:46,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 16:14:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-15 16:14:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-15 16:14:47,000 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-15 16:14:47,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:47,000 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-15 16:14:47,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-15 16:14:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:47,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:47,001 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:47,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:47,209 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:47,209 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-15 16:14:47,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:47,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998580318] [2020-10-15 16:14:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:47,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998580318] [2020-10-15 16:14:47,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804017514] [2020-10-15 16:14:47,281 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:47,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:47,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:14:47,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:47,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:47,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:47,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225121201] [2020-10-15 16:14:47,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:47,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:47,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:47,449 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 15 states. [2020-10-15 16:14:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:48,006 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-10-15 16:14:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:14:48,006 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:48,007 INFO L225 Difference]: With dead ends: 224 [2020-10-15 16:14:48,007 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:14:48,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:14:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:14:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2020-10-15 16:14:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-15 16:14:48,011 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-15 16:14:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:48,012 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-15 16:14:48,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-15 16:14:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:48,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:48,013 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:48,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-15 16:14:48,224 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:48,224 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-15 16:14:48,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:48,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880579897] [2020-10-15 16:14:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:48,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880579897] [2020-10-15 16:14:48,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664632062] [2020-10-15 16:14:48,304 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:48,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:48,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:48,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:48,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582468114] [2020-10-15 16:14:48,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:48,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:48,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:48,461 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-15 16:14:48,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:48,656 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 16:14:48,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:48,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:48,657 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:14:48,657 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:14:48,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:14:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-15 16:14:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-15 16:14:48,660 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-15 16:14:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:48,660 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-15 16:14:48,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-15 16:14:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:48,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:48,661 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:48,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:48,862 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-15 16:14:48,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:48,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897190259] [2020-10-15 16:14:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:48,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897190259] [2020-10-15 16:14:48,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697566718] [2020-10-15 16:14:48,946 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:48,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:48,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:48,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:49,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:49,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:49,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525414763] [2020-10-15 16:14:49,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:49,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:49,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:49,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:49,109 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-15 16:14:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:49,385 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-15 16:14:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:49,385 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:49,386 INFO L225 Difference]: With dead ends: 205 [2020-10-15 16:14:49,386 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 16:14:49,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 16:14:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-15 16:14:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-15 16:14:49,390 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-15 16:14:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:49,390 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-15 16:14:49,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-15 16:14:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:49,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:49,391 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:49,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:49,598 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:49,598 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-15 16:14:49,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:49,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562430297] [2020-10-15 16:14:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:49,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562430297] [2020-10-15 16:14:49,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027182148] [2020-10-15 16:14:49,678 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:49,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:14:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:49,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:49,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:49,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:49,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71711302] [2020-10-15 16:14:49,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:49,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:49,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:49,838 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-15 16:14:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:50,077 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 16:14:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:50,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:50,078 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:14:50,079 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:14:50,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:14:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-15 16:14:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:14:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-15 16:14:50,082 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-15 16:14:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:50,082 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-15 16:14:50,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-15 16:14:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:50,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:50,082 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:50,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:50,283 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:50,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-15 16:14:50,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:50,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917132511] [2020-10-15 16:14:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917132511] [2020-10-15 16:14:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976091325] [2020-10-15 16:14:50,361 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:50,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:50,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:50,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:50,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:50,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703342139] [2020-10-15 16:14:50,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:50,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:50,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:50,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:50,592 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-15 16:14:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:50,888 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 16:14:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:50,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:50,890 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:14:50,890 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:14:50,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:14:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-15 16:14:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-15 16:14:50,895 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-15 16:14:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:50,896 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-15 16:14:50,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-15 16:14:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:50,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:50,897 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:51,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 16:14:51,107 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-15 16:14:51,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:51,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846775229] [2020-10-15 16:14:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:51,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846775229] [2020-10-15 16:14:51,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110888112] [2020-10-15 16:14:51,177 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:51,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:51,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:51,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:51,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:51,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:51,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138417063] [2020-10-15 16:14:51,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:51,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:51,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:51,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:51,345 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-15 16:14:51,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:51,652 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-15 16:14:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:14:51,653 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:51,653 INFO L225 Difference]: With dead ends: 209 [2020-10-15 16:14:51,653 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:51,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:14:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-15 16:14:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-15 16:14:51,657 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-15 16:14:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:51,657 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-15 16:14:51,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-15 16:14:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:51,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:51,658 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:51,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:51,863 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:51,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:51,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-15 16:14:51,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:51,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751561246] [2020-10-15 16:14:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:51,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751561246] [2020-10-15 16:14:51,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562002009] [2020-10-15 16:14:51,933 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:51,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:51,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:51,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:51,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:52,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:52,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:52,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19493449] [2020-10-15 16:14:52,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:52,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:52,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:52,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:52,099 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:52,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:52,394 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-15 16:14:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:14:52,395 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:52,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:52,396 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:14:52,396 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 16:14:52,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 16:14:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-15 16:14:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 16:14:52,399 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 16:14:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:52,399 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 16:14:52,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 16:14:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:52,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:52,399 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:52,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 16:14:52,600 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:52,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-15 16:14:52,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:52,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123780531] [2020-10-15 16:14:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:52,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123780531] [2020-10-15 16:14:52,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284030465] [2020-10-15 16:14:52,673 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:52,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:52,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:52,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:52,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:52,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:52,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383086159] [2020-10-15 16:14:52,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:52,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:52,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:52,842 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-15 16:14:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:53,124 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 16:14:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:53,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:53,125 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:14:53,125 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:14:53,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:14:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-15 16:14:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-15 16:14:53,129 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-15 16:14:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:53,129 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-15 16:14:53,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-15 16:14:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:53,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:53,130 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:53,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 16:14:53,333 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-15 16:14:53,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:53,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668709460] [2020-10-15 16:14:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:53,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668709460] [2020-10-15 16:14:53,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448039970] [2020-10-15 16:14:53,403 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:53,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:53,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:53,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:53,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:53,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920264079] [2020-10-15 16:14:53,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:53,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:53,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:53,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:53,572 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-15 16:14:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:53,979 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-15 16:14:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:14:53,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:53,980 INFO L225 Difference]: With dead ends: 215 [2020-10-15 16:14:53,980 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 16:14:53,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:53,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 16:14:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-15 16:14:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 16:14:53,984 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 16:14:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:53,984 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 16:14:53,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 16:14:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:53,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:53,985 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:54,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:54,189 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:54,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-15 16:14:54,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:54,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698170958] [2020-10-15 16:14:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:54,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698170958] [2020-10-15 16:14:54,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780337503] [2020-10-15 16:14:54,271 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:54,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:14:54,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:54,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:54,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:54,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:54,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058944108] [2020-10-15 16:14:54,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:54,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:54,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:54,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:54,432 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 16:14:54,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:54,778 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-15 16:14:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:54,779 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:54,780 INFO L225 Difference]: With dead ends: 196 [2020-10-15 16:14:54,781 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 16:14:54,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:14:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 16:14:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-15 16:14:54,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:14:54,784 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:14:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:54,784 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:14:54,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:14:54,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:54,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:54,785 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:54,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:54,990 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:54,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-15 16:14:54,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:54,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875309025] [2020-10-15 16:14:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:55,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875309025] [2020-10-15 16:14:55,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916305855] [2020-10-15 16:14:55,060 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:55,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:55,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:55,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:55,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:55,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:55,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136211325] [2020-10-15 16:14:55,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:55,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:55,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:55,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:55,199 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:14:55,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:55,464 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-15 16:14:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:55,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:55,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:55,466 INFO L225 Difference]: With dead ends: 191 [2020-10-15 16:14:55,466 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 16:14:55,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 16:14:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-15 16:14:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:14:55,469 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:14:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:55,470 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:14:55,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:14:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:55,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:55,470 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:55,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 16:14:55,675 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:55,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:55,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-15 16:14:55,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:55,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858827295] [2020-10-15 16:14:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:55,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858827295] [2020-10-15 16:14:55,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555814681] [2020-10-15 16:14:55,749 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:55,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:55,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:55,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:55,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:55,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:56,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:56,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:56,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436144572] [2020-10-15 16:14:56,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:56,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:56,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:56,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:56,004 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:14:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:56,654 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-15 16:14:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:14:56,655 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:56,656 INFO L225 Difference]: With dead ends: 232 [2020-10-15 16:14:56,656 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:14:56,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:14:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:14:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-15 16:14:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 16:14:56,660 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 16:14:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:56,660 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 16:14:56,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 16:14:56,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:56,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:56,661 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:56,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:56,868 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-15 16:14:56,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:56,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937965587] [2020-10-15 16:14:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:56,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937965587] [2020-10-15 16:14:56,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137792271] [2020-10-15 16:14:56,941 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:56,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:56,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:56,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:14:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:57,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:57,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:57,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016711874] [2020-10-15 16:14:57,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:57,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:57,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:57,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:57,086 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 16:14:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:57,733 INFO L93 Difference]: Finished difference Result 243 states and 560 transitions. [2020-10-15 16:14:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:14:57,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:57,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:57,734 INFO L225 Difference]: With dead ends: 243 [2020-10-15 16:14:57,734 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 16:14:57,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:14:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 16:14:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 144. [2020-10-15 16:14:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:14:57,738 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:14:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:57,738 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:14:57,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:14:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:57,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:57,739 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:57,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:57,940 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-15 16:14:57,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:57,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786708065] [2020-10-15 16:14:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:58,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786708065] [2020-10-15 16:14:58,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698403875] [2020-10-15 16:14:58,016 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:58,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:58,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:58,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:58,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:58,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:58,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:58,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:58,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963154092] [2020-10-15 16:14:58,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:58,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:58,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:58,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:58,197 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:14:58,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:58,908 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-15 16:14:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:14:58,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:58,910 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:14:58,910 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 16:14:58,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:14:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 16:14:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-15 16:14:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:14:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-15 16:14:58,915 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-15 16:14:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:58,916 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-15 16:14:58,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-15 16:14:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:58,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:58,916 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:59,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:59,127 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:59,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-15 16:14:59,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:59,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139888743] [2020-10-15 16:14:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:59,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139888743] [2020-10-15 16:14:59,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859732774] [2020-10-15 16:14:59,202 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:59,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:59,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:59,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:59,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:59,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:59,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:59,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411612265] [2020-10-15 16:14:59,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:59,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:59,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:59,379 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-15 16:15:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:00,071 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-15 16:15:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:15:00,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:00,073 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:15:00,073 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 16:15:00,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:15:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 16:15:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-15 16:15:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:15:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-15 16:15:00,077 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-15 16:15:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:00,077 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-15 16:15:00,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-15 16:15:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:00,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:00,078 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:00,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-15 16:15:00,279 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:00,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-15 16:15:00,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:00,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531439813] [2020-10-15 16:15:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:00,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531439813] [2020-10-15 16:15:00,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967748467] [2020-10-15 16:15:00,347 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:00,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:15:00,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:00,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:00,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:00,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:00,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590447341] [2020-10-15 16:15:00,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:00,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:00,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:00,505 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-15 16:15:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:00,874 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-15 16:15:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:15:00,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:00,876 INFO L225 Difference]: With dead ends: 208 [2020-10-15 16:15:00,876 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:15:00,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:15:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:15:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-15 16:15:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:15:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-15 16:15:00,879 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-15 16:15:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:00,879 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-15 16:15:00,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-15 16:15:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:00,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:00,880 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:01,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 16:15:01,081 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-15 16:15:01,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:01,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990825694] [2020-10-15 16:15:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:01,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990825694] [2020-10-15 16:15:01,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352118832] [2020-10-15 16:15:01,156 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:01,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:01,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:01,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:01,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912382423] [2020-10-15 16:15:01,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:01,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:01,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:01,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:01,299 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-15 16:15:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:01,776 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-15 16:15:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:15:01,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:01,778 INFO L225 Difference]: With dead ends: 215 [2020-10-15 16:15:01,778 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 16:15:01,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:15:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 16:15:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-15 16:15:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:15:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 16:15:01,781 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 16:15:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:01,781 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 16:15:01,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 16:15:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:01,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:01,782 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:01,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-15 16:15:01,984 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-15 16:15:01,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:01,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900626148] [2020-10-15 16:15:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:02,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900626148] [2020-10-15 16:15:02,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118622868] [2020-10-15 16:15:02,060 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:02,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:02,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:02,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:02,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:02,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:15:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:02,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:02,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:02,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920741347] [2020-10-15 16:15:02,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:02,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:02,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:02,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:02,213 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 16:15:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:02,740 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-15 16:15:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:15:02,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:02,741 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:15:02,741 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 16:15:02,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:15:02,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 16:15:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-15 16:15:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:15:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 16:15:02,745 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 16:15:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:02,745 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 16:15:02,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 16:15:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:02,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:02,745 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:02,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 16:15:02,946 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-15 16:15:02,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:02,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40976827] [2020-10-15 16:15:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:03,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40976827] [2020-10-15 16:15:03,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444690348] [2020-10-15 16:15:03,022 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:03,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:15:03,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:03,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:03,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:03,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:15:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:03,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:03,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:03,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864594510] [2020-10-15 16:15:03,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:03,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:03,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:03,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:03,202 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 16:15:03,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:03,833 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-15 16:15:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:15:03,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:03,834 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:15:03,834 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:15:03,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:15:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:15:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-15 16:15:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 16:15:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-15 16:15:03,838 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-15 16:15:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:03,839 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-15 16:15:03,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-15 16:15:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:03,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:03,839 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:04,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 16:15:04,048 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-15 16:15:04,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:04,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874653252] [2020-10-15 16:15:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:04,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874653252] [2020-10-15 16:15:04,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247450066] [2020-10-15 16:15:04,124 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:04,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:04,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:04,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:04,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:15:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:04,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:04,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:04,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419757777] [2020-10-15 16:15:04,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:04,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:04,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:04,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:04,273 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-15 16:15:04,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:04,812 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-15 16:15:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:15:04,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:04,814 INFO L225 Difference]: With dead ends: 232 [2020-10-15 16:15:04,814 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 16:15:04,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:15:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 16:15:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-15 16:15:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 16:15:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-15 16:15:04,818 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-15 16:15:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:04,818 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-15 16:15:04,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-15 16:15:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:04,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:04,818 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:05,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:05,027 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:05,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-15 16:15:05,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:05,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661821722] [2020-10-15 16:15:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:05,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661821722] [2020-10-15 16:15:05,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154648855] [2020-10-15 16:15:05,134 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:05,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:15:05,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:15:05,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:05,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 16:15:05,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-15 16:15:05,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954874350] [2020-10-15 16:15:05,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:15:05,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:05,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:15:05,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:15:05,254 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-10-15 16:15:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:05,274 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-10-15 16:15:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:15:05,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-15 16:15:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:05,275 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:15:05,276 INFO L226 Difference]: Without dead ends: 188 [2020-10-15 16:15:05,276 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 [2020-10-15 16:15:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-15 16:15:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-15 16:15:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-15 16:15:05,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-10-15 16:15:05,279 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-10-15 16:15:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:05,279 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-10-15 16:15:05,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:15:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-10-15 16:15:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:05,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:05,280 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:05,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-15 16:15:05,489 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-15 16:15:05,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:05,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715694455] [2020-10-15 16:15:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:05,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715694455] [2020-10-15 16:15:05,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29563132] [2020-10-15 16:15:05,686 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:05,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:15:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:05,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:05,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:05,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030257484] [2020-10-15 16:15:05,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:05,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:05,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:05,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:05,909 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 17 states. [2020-10-15 16:15:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:05,973 INFO L93 Difference]: Finished difference Result 249 states and 638 transitions. [2020-10-15 16:15:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:15:05,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:15:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:05,974 INFO L225 Difference]: With dead ends: 249 [2020-10-15 16:15:05,974 INFO L226 Difference]: Without dead ends: 241 [2020-10-15 16:15:05,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:05,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-15 16:15:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 197. [2020-10-15 16:15:05,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-15 16:15:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 521 transitions. [2020-10-15 16:15:05,978 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 521 transitions. Word has length 13 [2020-10-15 16:15:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:05,979 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 521 transitions. [2020-10-15 16:15:05,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 521 transitions. [2020-10-15 16:15:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:05,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:05,979 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:06,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 16:15:06,190 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-15 16:15:06,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:06,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667127896] [2020-10-15 16:15:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:06,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667127896] [2020-10-15 16:15:06,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930840929] [2020-10-15 16:15:06,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:06,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:06,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:06,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:15:06,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:06,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 16:15:06,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-15 16:15:06,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750142382] [2020-10-15 16:15:06,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:15:06,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:06,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:15:06,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:15:06,433 INFO L87 Difference]: Start difference. First operand 197 states and 521 transitions. Second operand 8 states. [2020-10-15 16:15:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:06,459 INFO L93 Difference]: Finished difference Result 278 states and 705 transitions. [2020-10-15 16:15:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:15:06,459 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-15 16:15:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:06,460 INFO L225 Difference]: With dead ends: 278 [2020-10-15 16:15:06,460 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 16:15:06,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:15:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 16:15:06,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-15 16:15:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-15 16:15:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-10-15 16:15:06,463 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 13 [2020-10-15 16:15:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:06,463 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-10-15 16:15:06,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:15:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-10-15 16:15:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:06,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:06,464 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:06,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:06,665 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:06,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:06,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-15 16:15:06,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:06,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547487153] [2020-10-15 16:15:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:06,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547487153] [2020-10-15 16:15:06,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469671513] [2020-10-15 16:15:06,774 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:06,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:15:06,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:06,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:06,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:06,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:06,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:06,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388693279] [2020-10-15 16:15:06,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:06,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:06,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:06,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:06,999 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand 17 states. [2020-10-15 16:15:07,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:07,088 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-10-15 16:15:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:15:07,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:07,090 INFO L225 Difference]: With dead ends: 275 [2020-10-15 16:15:07,091 INFO L226 Difference]: Without dead ends: 273 [2020-10-15 16:15:07,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-15 16:15:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2020-10-15 16:15:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-15 16:15:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2020-10-15 16:15:07,098 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 14 [2020-10-15 16:15:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:07,098 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2020-10-15 16:15:07,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2020-10-15 16:15:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:07,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:07,099 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:07,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:07,313 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:07,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-15 16:15:07,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:07,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136880938] [2020-10-15 16:15:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:07,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136880938] [2020-10-15 16:15:07,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177219827] [2020-10-15 16:15:07,415 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:07,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:15:07,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:07,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:07,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:07,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:07,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:07,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620307162] [2020-10-15 16:15:07,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:07,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:07,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:07,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:07,612 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand 17 states. [2020-10-15 16:15:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:07,814 INFO L93 Difference]: Finished difference Result 295 states and 735 transitions. [2020-10-15 16:15:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:15:07,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:07,817 INFO L225 Difference]: With dead ends: 295 [2020-10-15 16:15:07,817 INFO L226 Difference]: Without dead ends: 292 [2020-10-15 16:15:07,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:15:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-15 16:15:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-10-15 16:15:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-15 16:15:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 657 transitions. [2020-10-15 16:15:07,821 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 657 transitions. Word has length 14 [2020-10-15 16:15:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:07,822 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 657 transitions. [2020-10-15 16:15:07,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 657 transitions. [2020-10-15 16:15:07,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:07,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:07,822 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:08,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:08,033 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:08,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-15 16:15:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:08,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712852296] [2020-10-15 16:15:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:08,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712852296] [2020-10-15 16:15:08,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94120892] [2020-10-15 16:15:08,149 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:08,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:08,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:08,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:08,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:08,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537024333] [2020-10-15 16:15:08,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:08,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:08,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:08,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:08,415 INFO L87 Difference]: Start difference. First operand 251 states and 657 transitions. Second operand 17 states. [2020-10-15 16:15:08,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:08,668 INFO L93 Difference]: Finished difference Result 320 states and 793 transitions. [2020-10-15 16:15:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:15:08,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:08,670 INFO L225 Difference]: With dead ends: 320 [2020-10-15 16:15:08,670 INFO L226 Difference]: Without dead ends: 316 [2020-10-15 16:15:08,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-15 16:15:08,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2020-10-15 16:15:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-15 16:15:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 663 transitions. [2020-10-15 16:15:08,674 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 663 transitions. Word has length 14 [2020-10-15 16:15:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:08,674 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 663 transitions. [2020-10-15 16:15:08,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 663 transitions. [2020-10-15 16:15:08,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:08,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:08,675 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:08,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:08,875 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:08,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-15 16:15:08,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:08,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567253208] [2020-10-15 16:15:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:08,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567253208] [2020-10-15 16:15:08,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567324148] [2020-10-15 16:15:08,981 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:09,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:09,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:09,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:09,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:09,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:09,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:09,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452087233] [2020-10-15 16:15:09,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:09,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:09,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:09,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:09,245 INFO L87 Difference]: Start difference. First operand 253 states and 663 transitions. Second operand 17 states. [2020-10-15 16:15:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:09,533 INFO L93 Difference]: Finished difference Result 316 states and 781 transitions. [2020-10-15 16:15:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:15:09,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:09,535 INFO L225 Difference]: With dead ends: 316 [2020-10-15 16:15:09,535 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 16:15:09,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:15:09,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 16:15:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 255. [2020-10-15 16:15:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-15 16:15:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2020-10-15 16:15:09,540 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 14 [2020-10-15 16:15:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:09,540 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2020-10-15 16:15:09,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2020-10-15 16:15:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:09,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:09,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:09,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-15 16:15:09,744 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-15 16:15:09,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:09,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40016608] [2020-10-15 16:15:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:09,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40016608] [2020-10-15 16:15:09,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298355935] [2020-10-15 16:15:09,846 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:09,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:15:09,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:09,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:13,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:13,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:13,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516846959] [2020-10-15 16:15:13,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:13,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:13,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:13,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:15:13,598 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand 17 states. [2020-10-15 16:15:17,791 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:15:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:18,026 INFO L93 Difference]: Finished difference Result 342 states and 843 transitions. [2020-10-15 16:15:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:15:18,027 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:18,028 INFO L225 Difference]: With dead ends: 342 [2020-10-15 16:15:18,028 INFO L226 Difference]: Without dead ends: 337 [2020-10-15 16:15:18,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-15 16:15:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-15 16:15:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-10-15 16:15:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-15 16:15:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-15 16:15:18,032 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-15 16:15:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:18,032 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-15 16:15:18,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-15 16:15:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:18,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:18,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:18,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 16:15:18,234 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-15 16:15:18,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:18,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948668024] [2020-10-15 16:15:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:18,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948668024] [2020-10-15 16:15:18,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785355078] [2020-10-15 16:15:18,340 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:18,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:18,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:18,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:18,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:18,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:18,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:18,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953852790] [2020-10-15 16:15:18,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:18,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:18,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:18,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:18,603 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-15 16:15:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:18,915 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2020-10-15 16:15:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:15:18,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:18,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:18,916 INFO L225 Difference]: With dead ends: 331 [2020-10-15 16:15:18,917 INFO L226 Difference]: Without dead ends: 327 [2020-10-15 16:15:18,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:15:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-15 16:15:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 256. [2020-10-15 16:15:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-15 16:15:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-15 16:15:18,920 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-15 16:15:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:18,920 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-15 16:15:18,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-15 16:15:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:18,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:18,921 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:19,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 16:15:19,122 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:19,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-15 16:15:19,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:19,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398667350] [2020-10-15 16:15:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:19,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398667350] [2020-10-15 16:15:19,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021568250] [2020-10-15 16:15:19,224 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:19,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:15:19,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:19,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:19,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:19,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:19,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:19,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416829707] [2020-10-15 16:15:19,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:19,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:19,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:19,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:19,422 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-15 16:15:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:19,727 INFO L93 Difference]: Finished difference Result 321 states and 792 transitions. [2020-10-15 16:15:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:15:19,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:19,729 INFO L225 Difference]: With dead ends: 321 [2020-10-15 16:15:19,730 INFO L226 Difference]: Without dead ends: 318 [2020-10-15 16:15:19,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:15:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-15 16:15:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-10-15 16:15:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-15 16:15:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-15 16:15:19,734 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-15 16:15:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:19,735 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-15 16:15:19,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-15 16:15:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:19,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:19,735 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:19,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 16:15:19,947 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:19,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-15 16:15:19,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:19,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603080007] [2020-10-15 16:15:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:20,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603080007] [2020-10-15 16:15:20,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036322887] [2020-10-15 16:15:20,060 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:20,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:15:20,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:20,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:20,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:20,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:20,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287431641] [2020-10-15 16:15:20,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:20,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:20,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:20,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:20,269 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-15 16:15:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:20,592 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-15 16:15:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:20,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:20,594 INFO L225 Difference]: With dead ends: 348 [2020-10-15 16:15:20,594 INFO L226 Difference]: Without dead ends: 343 [2020-10-15 16:15:20,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:15:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-15 16:15:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2020-10-15 16:15:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-15 16:15:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 684 transitions. [2020-10-15 16:15:20,598 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 684 transitions. Word has length 14 [2020-10-15 16:15:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:20,598 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 684 transitions. [2020-10-15 16:15:20,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 684 transitions. [2020-10-15 16:15:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:20,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:20,599 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:20,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 16:15:20,799 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:20,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-15 16:15:20,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:20,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249372807] [2020-10-15 16:15:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:20,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249372807] [2020-10-15 16:15:20,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536356503] [2020-10-15 16:15:20,902 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:20,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:20,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:21,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:21,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:21,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144013850] [2020-10-15 16:15:21,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:21,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:21,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:21,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:21,080 INFO L87 Difference]: Start difference. First operand 260 states and 684 transitions. Second operand 17 states. [2020-10-15 16:15:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:21,370 INFO L93 Difference]: Finished difference Result 349 states and 864 transitions. [2020-10-15 16:15:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:21,371 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:21,371 INFO L225 Difference]: With dead ends: 349 [2020-10-15 16:15:21,371 INFO L226 Difference]: Without dead ends: 344 [2020-10-15 16:15:21,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:15:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-15 16:15:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-10-15 16:15:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-15 16:15:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-15 16:15:21,375 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-15 16:15:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:21,375 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-15 16:15:21,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-15 16:15:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:21,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:21,376 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:21,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-15 16:15:21,577 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-15 16:15:21,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:21,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209460544] [2020-10-15 16:15:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:21,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209460544] [2020-10-15 16:15:21,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212070476] [2020-10-15 16:15:21,676 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:21,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:21,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:21,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:21,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:21,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796259746] [2020-10-15 16:15:21,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:21,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:21,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:21,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:21,863 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-15 16:15:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:22,122 INFO L93 Difference]: Finished difference Result 332 states and 822 transitions. [2020-10-15 16:15:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:15:22,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:22,123 INFO L225 Difference]: With dead ends: 332 [2020-10-15 16:15:22,123 INFO L226 Difference]: Without dead ends: 314 [2020-10-15 16:15:22,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:15:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-15 16:15:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-10-15 16:15:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-15 16:15:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 677 transitions. [2020-10-15 16:15:22,128 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 677 transitions. Word has length 14 [2020-10-15 16:15:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:22,128 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 677 transitions. [2020-10-15 16:15:22,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 677 transitions. [2020-10-15 16:15:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:22,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:22,128 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:22,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:22,329 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:22,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:22,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-15 16:15:22,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:22,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945398447] [2020-10-15 16:15:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:22,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945398447] [2020-10-15 16:15:22,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931517740] [2020-10-15 16:15:22,437 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:22,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:15:22,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:22,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:22,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:22,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:22,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:22,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916770897] [2020-10-15 16:15:22,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:22,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:22,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:22,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:22,618 INFO L87 Difference]: Start difference. First operand 260 states and 677 transitions. Second operand 17 states. [2020-10-15 16:15:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:22,870 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2020-10-15 16:15:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:15:22,871 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:22,872 INFO L225 Difference]: With dead ends: 315 [2020-10-15 16:15:22,872 INFO L226 Difference]: Without dead ends: 312 [2020-10-15 16:15:22,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:15:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-15 16:15:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2020-10-15 16:15:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-15 16:15:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-15 16:15:22,876 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-15 16:15:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:22,876 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-15 16:15:22,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:22,876 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-15 16:15:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:22,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:22,877 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:23,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:23,079 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:23,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-15 16:15:23,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:23,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193906481] [2020-10-15 16:15:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:23,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193906481] [2020-10-15 16:15:23,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99078044] [2020-10-15 16:15:23,190 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:23,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:23,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:23,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:23,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:23,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:23,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598809842] [2020-10-15 16:15:23,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:23,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:23,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:23,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:23,386 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-15 16:15:23,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:23,656 INFO L93 Difference]: Finished difference Result 334 states and 821 transitions. [2020-10-15 16:15:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:15:23,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:23,657 INFO L225 Difference]: With dead ends: 334 [2020-10-15 16:15:23,657 INFO L226 Difference]: Without dead ends: 330 [2020-10-15 16:15:23,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:15:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-15 16:15:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-10-15 16:15:23,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-15 16:15:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 687 transitions. [2020-10-15 16:15:23,667 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 687 transitions. Word has length 14 [2020-10-15 16:15:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:23,667 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 687 transitions. [2020-10-15 16:15:23,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 687 transitions. [2020-10-15 16:15:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:23,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:23,668 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:23,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:23,869 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:23,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-15 16:15:23,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:23,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97292696] [2020-10-15 16:15:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:23,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97292696] [2020-10-15 16:15:23,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149908134] [2020-10-15 16:15:23,979 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:24,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:15:24,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:24,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:24,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:24,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:24,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:24,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833535743] [2020-10-15 16:15:24,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:24,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:24,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:24,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:24,905 INFO L87 Difference]: Start difference. First operand 264 states and 687 transitions. Second operand 17 states. [2020-10-15 16:15:25,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:25,272 INFO L93 Difference]: Finished difference Result 351 states and 859 transitions. [2020-10-15 16:15:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:25,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:25,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:25,274 INFO L225 Difference]: With dead ends: 351 [2020-10-15 16:15:25,274 INFO L226 Difference]: Without dead ends: 346 [2020-10-15 16:15:25,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:15:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-15 16:15:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-15 16:15:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 16:15:25,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 700 transitions. [2020-10-15 16:15:25,278 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 700 transitions. Word has length 14 [2020-10-15 16:15:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:25,279 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 700 transitions. [2020-10-15 16:15:25,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 700 transitions. [2020-10-15 16:15:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:25,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:25,279 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:25,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:25,481 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:25,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-15 16:15:25,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:25,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212508294] [2020-10-15 16:15:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:25,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212508294] [2020-10-15 16:15:25,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812769995] [2020-10-15 16:15:25,592 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:25,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:15:25,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:25,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:25,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:25,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:25,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:25,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999224499] [2020-10-15 16:15:25,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:25,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:25,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:25,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:25,771 INFO L87 Difference]: Start difference. First operand 269 states and 700 transitions. Second operand 17 states. [2020-10-15 16:15:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:26,056 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2020-10-15 16:15:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:26,057 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:26,058 INFO L225 Difference]: With dead ends: 357 [2020-10-15 16:15:26,058 INFO L226 Difference]: Without dead ends: 339 [2020-10-15 16:15:26,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:15:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-15 16:15:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2020-10-15 16:15:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 16:15:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2020-10-15 16:15:26,063 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 14 [2020-10-15 16:15:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:26,063 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2020-10-15 16:15:26,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2020-10-15 16:15:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:26,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:26,064 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:26,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:26,268 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:26,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-15 16:15:26,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:26,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938297663] [2020-10-15 16:15:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:26,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938297663] [2020-10-15 16:15:26,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140849715] [2020-10-15 16:15:26,387 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:26,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:26,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:26,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514988102] [2020-10-15 16:15:26,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:26,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:26,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:26,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:26,597 INFO L87 Difference]: Start difference. First operand 269 states and 696 transitions. Second operand 17 states. [2020-10-15 16:15:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:26,876 INFO L93 Difference]: Finished difference Result 332 states and 820 transitions. [2020-10-15 16:15:26,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:15:26,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:26,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:26,877 INFO L225 Difference]: With dead ends: 332 [2020-10-15 16:15:26,878 INFO L226 Difference]: Without dead ends: 327 [2020-10-15 16:15:26,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:15:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-15 16:15:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 266. [2020-10-15 16:15:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-15 16:15:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 689 transitions. [2020-10-15 16:15:26,881 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 689 transitions. Word has length 14 [2020-10-15 16:15:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:26,881 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 689 transitions. [2020-10-15 16:15:26,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 689 transitions. [2020-10-15 16:15:26,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:26,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:26,882 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:27,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 16:15:27,083 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:27,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-15 16:15:27,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:27,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077132709] [2020-10-15 16:15:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:27,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077132709] [2020-10-15 16:15:27,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275086608] [2020-10-15 16:15:27,224 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:27,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:27,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:27,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:27,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:27,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:27,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:27,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570943865] [2020-10-15 16:15:27,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:27,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:27,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:27,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:27,425 INFO L87 Difference]: Start difference. First operand 266 states and 689 transitions. Second operand 17 states. [2020-10-15 16:15:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:27,602 INFO L93 Difference]: Finished difference Result 322 states and 792 transitions. [2020-10-15 16:15:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:15:27,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:27,604 INFO L225 Difference]: With dead ends: 322 [2020-10-15 16:15:27,604 INFO L226 Difference]: Without dead ends: 309 [2020-10-15 16:15:27,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:15:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-15 16:15:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2020-10-15 16:15:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-15 16:15:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-15 16:15:27,608 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-15 16:15:27,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:27,608 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-15 16:15:27,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-15 16:15:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:27,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:27,609 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:27,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 16:15:27,809 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:27,810 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-15 16:15:27,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:27,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910816015] [2020-10-15 16:15:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:27,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910816015] [2020-10-15 16:15:27,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249608409] [2020-10-15 16:15:27,970 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:28,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:15:28,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:28,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:28,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287774179] [2020-10-15 16:15:28,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:28,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:28,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:28,167 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-15 16:15:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:28,245 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2020-10-15 16:15:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:15:28,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:28,247 INFO L225 Difference]: With dead ends: 305 [2020-10-15 16:15:28,247 INFO L226 Difference]: Without dead ends: 303 [2020-10-15 16:15:28,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:15:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-15 16:15:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-10-15 16:15:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-15 16:15:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 709 transitions. [2020-10-15 16:15:28,251 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 709 transitions. Word has length 14 [2020-10-15 16:15:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:28,251 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 709 transitions. [2020-10-15 16:15:28,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 709 transitions. [2020-10-15 16:15:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:28,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:28,252 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:28,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 16:15:28,461 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-15 16:15:28,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:28,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261340737] [2020-10-15 16:15:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:28,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261340737] [2020-10-15 16:15:28,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645493369] [2020-10-15 16:15:28,603 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:28,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:28,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:28,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:28,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:28,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:28,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:28,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474107258] [2020-10-15 16:15:28,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:28,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:28,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:28,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:28,803 INFO L87 Difference]: Start difference. First operand 274 states and 709 transitions. Second operand 17 states. [2020-10-15 16:15:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:29,032 INFO L93 Difference]: Finished difference Result 325 states and 802 transitions. [2020-10-15 16:15:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:29,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:29,034 INFO L225 Difference]: With dead ends: 325 [2020-10-15 16:15:29,034 INFO L226 Difference]: Without dead ends: 322 [2020-10-15 16:15:29,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-15 16:15:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 272. [2020-10-15 16:15:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-15 16:15:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-15 16:15:29,038 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-15 16:15:29,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:29,038 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-15 16:15:29,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-15 16:15:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:29,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:29,039 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:29,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 16:15:29,240 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:29,240 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-15 16:15:29,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:29,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783303172] [2020-10-15 16:15:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:29,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783303172] [2020-10-15 16:15:29,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516300480] [2020-10-15 16:15:29,388 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:29,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:15:29,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:29,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:29,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:29,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:29,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:29,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308027825] [2020-10-15 16:15:29,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:29,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:29,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:29,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:29,649 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-15 16:15:29,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:29,954 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-15 16:15:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:29,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:29,955 INFO L225 Difference]: With dead ends: 348 [2020-10-15 16:15:29,955 INFO L226 Difference]: Without dead ends: 344 [2020-10-15 16:15:29,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:15:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-15 16:15:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-10-15 16:15:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-15 16:15:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 697 transitions. [2020-10-15 16:15:29,959 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 697 transitions. Word has length 14 [2020-10-15 16:15:29,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:29,959 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 697 transitions. [2020-10-15 16:15:29,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:29,959 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 697 transitions. [2020-10-15 16:15:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:29,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:29,959 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:30,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:30,160 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:30,161 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-15 16:15:30,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:30,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359175678] [2020-10-15 16:15:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:30,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359175678] [2020-10-15 16:15:30,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050546566] [2020-10-15 16:15:30,278 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:30,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:15:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:30,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:30,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:31,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:31,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:31,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668725813] [2020-10-15 16:15:31,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:31,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:31,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:31,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:31,777 INFO L87 Difference]: Start difference. First operand 270 states and 697 transitions. Second operand 17 states. [2020-10-15 16:15:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:32,148 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2020-10-15 16:15:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:15:32,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:32,149 INFO L225 Difference]: With dead ends: 338 [2020-10-15 16:15:32,149 INFO L226 Difference]: Without dead ends: 335 [2020-10-15 16:15:32,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:15:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-15 16:15:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2020-10-15 16:15:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-15 16:15:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-15 16:15:32,154 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-15 16:15:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:32,154 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-15 16:15:32,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-15 16:15:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:32,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:32,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:32,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:32,364 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-15 16:15:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:32,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821980623] [2020-10-15 16:15:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:32,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821980623] [2020-10-15 16:15:32,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291485434] [2020-10-15 16:15:32,483 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:32,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:35,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:35,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:35,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539461645] [2020-10-15 16:15:35,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:35,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:35,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:35,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:15:35,882 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-15 16:15:40,097 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:15:40,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:40,422 INFO L93 Difference]: Finished difference Result 369 states and 902 transitions. [2020-10-15 16:15:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:15:40,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:40,423 INFO L225 Difference]: With dead ends: 369 [2020-10-15 16:15:40,423 INFO L226 Difference]: Without dead ends: 364 [2020-10-15 16:15:40,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-15 16:15:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-15 16:15:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 272. [2020-10-15 16:15:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-15 16:15:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-15 16:15:40,428 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-15 16:15:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:40,429 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-15 16:15:40,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-15 16:15:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:40,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:40,430 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:40,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-15 16:15:40,633 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:40,634 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-15 16:15:40,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:40,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282501927] [2020-10-15 16:15:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:40,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282501927] [2020-10-15 16:15:40,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103005718] [2020-10-15 16:15:40,748 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:40,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:40,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:40,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:40,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:40,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:40,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:40,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944184063] [2020-10-15 16:15:40,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:40,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:40,991 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-15 16:15:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:41,382 INFO L93 Difference]: Finished difference Result 352 states and 862 transitions. [2020-10-15 16:15:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:15:41,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:41,384 INFO L225 Difference]: With dead ends: 352 [2020-10-15 16:15:41,384 INFO L226 Difference]: Without dead ends: 348 [2020-10-15 16:15:41,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:15:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-15 16:15:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2020-10-15 16:15:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-15 16:15:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-15 16:15:41,388 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-15 16:15:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:41,388 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-15 16:15:41,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-15 16:15:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:41,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:41,389 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:41,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:41,590 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:41,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:41,590 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-15 16:15:41,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:41,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115847288] [2020-10-15 16:15:41,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:41,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115847288] [2020-10-15 16:15:41,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447993268] [2020-10-15 16:15:41,693 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:41,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:15:41,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:41,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:41,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:41,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:41,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:41,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399928874] [2020-10-15 16:15:41,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:41,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:41,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:41,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:41,894 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-15 16:15:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:42,292 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2020-10-15 16:15:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:15:42,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:42,293 INFO L225 Difference]: With dead ends: 330 [2020-10-15 16:15:42,293 INFO L226 Difference]: Without dead ends: 327 [2020-10-15 16:15:42,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:15:42,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-15 16:15:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-10-15 16:15:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-15 16:15:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-15 16:15:42,297 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-15 16:15:42,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:42,297 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-15 16:15:42,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-15 16:15:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:42,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:42,298 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:42,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:42,499 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-15 16:15:42,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:42,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247991663] [2020-10-15 16:15:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:42,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247991663] [2020-10-15 16:15:42,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720023659] [2020-10-15 16:15:42,607 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:42,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:42,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:42,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:42,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:42,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:42,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:42,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267990496] [2020-10-15 16:15:42,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:42,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:42,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:42,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:42,821 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-15 16:15:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:43,245 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2020-10-15 16:15:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:15:43,245 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:43,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:43,246 INFO L225 Difference]: With dead ends: 365 [2020-10-15 16:15:43,246 INFO L226 Difference]: Without dead ends: 360 [2020-10-15 16:15:43,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:15:43,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-15 16:15:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 272. [2020-10-15 16:15:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-15 16:15:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-15 16:15:43,250 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-15 16:15:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:43,250 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-15 16:15:43,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-15 16:15:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:43,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:43,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:43,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:43,454 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:43,455 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-15 16:15:43,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:43,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586673303] [2020-10-15 16:15:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:43,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586673303] [2020-10-15 16:15:43,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790547563] [2020-10-15 16:15:43,557 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:43,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:15:43,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:43,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:43,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:43,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964572176] [2020-10-15 16:15:43,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:43,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:43,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:43,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:43,743 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-15 16:15:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:44,109 INFO L93 Difference]: Finished difference Result 363 states and 882 transitions. [2020-10-15 16:15:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:15:44,110 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:44,111 INFO L225 Difference]: With dead ends: 363 [2020-10-15 16:15:44,111 INFO L226 Difference]: Without dead ends: 358 [2020-10-15 16:15:44,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:15:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-15 16:15:44,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2020-10-15 16:15:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-15 16:15:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-15 16:15:44,115 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-15 16:15:44,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:44,115 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-15 16:15:44,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-15 16:15:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:44,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:44,115 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:44,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-15 16:15:44,317 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-15 16:15:44,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:44,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668734427] [2020-10-15 16:15:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:44,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668734427] [2020-10-15 16:15:44,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776363104] [2020-10-15 16:15:44,419 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:44,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:15:44,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:44,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:44,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:44,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:44,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380627427] [2020-10-15 16:15:44,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:44,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:44,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:44,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:44,625 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-15 16:15:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:44,925 INFO L93 Difference]: Finished difference Result 333 states and 812 transitions. [2020-10-15 16:15:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:15:44,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:44,927 INFO L225 Difference]: With dead ends: 333 [2020-10-15 16:15:44,927 INFO L226 Difference]: Without dead ends: 315 [2020-10-15 16:15:44,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:15:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-15 16:15:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 266. [2020-10-15 16:15:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-15 16:15:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-15 16:15:44,930 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-15 16:15:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:44,930 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-15 16:15:44,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-15 16:15:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:44,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:44,931 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:45,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 16:15:45,132 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:45,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-15 16:15:45,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:45,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504059099] [2020-10-15 16:15:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:45,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504059099] [2020-10-15 16:15:45,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902570102] [2020-10-15 16:15:45,294 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:45,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:45,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:45,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:45,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:45,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268727211] [2020-10-15 16:15:45,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:45,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:45,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:45,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:45,577 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-15 16:15:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:45,673 INFO L93 Difference]: Finished difference Result 296 states and 732 transitions. [2020-10-15 16:15:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:15:45,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:45,674 INFO L225 Difference]: With dead ends: 296 [2020-10-15 16:15:45,675 INFO L226 Difference]: Without dead ends: 294 [2020-10-15 16:15:45,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:15:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-15 16:15:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-10-15 16:15:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-15 16:15:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 695 transitions. [2020-10-15 16:15:45,679 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 695 transitions. Word has length 14 [2020-10-15 16:15:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:45,679 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 695 transitions. [2020-10-15 16:15:45,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 695 transitions. [2020-10-15 16:15:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:45,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:45,680 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:45,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 16:15:45,888 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:45,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-15 16:15:45,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:45,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266952071] [2020-10-15 16:15:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:46,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266952071] [2020-10-15 16:15:46,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210927387] [2020-10-15 16:15:46,015 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:46,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:46,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:46,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:46,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:46,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:46,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:46,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106058804] [2020-10-15 16:15:46,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:46,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:46,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:46,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:46,216 INFO L87 Difference]: Start difference. First operand 270 states and 695 transitions. Second operand 17 states. [2020-10-15 16:15:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:46,476 INFO L93 Difference]: Finished difference Result 328 states and 803 transitions. [2020-10-15 16:15:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:15:46,477 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:46,478 INFO L225 Difference]: With dead ends: 328 [2020-10-15 16:15:46,478 INFO L226 Difference]: Without dead ends: 325 [2020-10-15 16:15:46,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:15:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-15 16:15:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2020-10-15 16:15:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-15 16:15:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-15 16:15:46,483 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-15 16:15:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:46,483 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-15 16:15:46,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-15 16:15:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:46,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:46,483 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:46,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 16:15:46,684 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:46,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-15 16:15:46,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:46,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580835980] [2020-10-15 16:15:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:46,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580835980] [2020-10-15 16:15:46,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572204344] [2020-10-15 16:15:46,805 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:46,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:15:46,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:46,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:47,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:47,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:15:47,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497745075] [2020-10-15 16:15:47,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:15:47,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:47,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:15:47,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:15:47,056 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-15 16:15:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:47,416 INFO L93 Difference]: Finished difference Result 344 states and 841 transitions. [2020-10-15 16:15:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:15:47,417 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:15:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:47,417 INFO L225 Difference]: With dead ends: 344 [2020-10-15 16:15:47,417 INFO L226 Difference]: Without dead ends: 340 [2020-10-15 16:15:47,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:15:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-15 16:15:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 266. [2020-10-15 16:15:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-15 16:15:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-15 16:15:47,422 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-15 16:15:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:47,422 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-15 16:15:47,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:15:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-15 16:15:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:15:47,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:47,423 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:47,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 16:15:47,632 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:47,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-15 16:15:47,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:47,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163402710] [2020-10-15 16:15:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:47,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163402710] [2020-10-15 16:15:47,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445765045] [2020-10-15 16:15:47,737 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:47,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:47,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:47,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:15:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:51,301 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 16:15:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:51,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:51,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:15:51,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51625954] [2020-10-15 16:15:51,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:15:51,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:51,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:15:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=229, Unknown=4, NotChecked=0, Total=306 [2020-10-15 16:15:51,304 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 18 states. [2020-10-15 16:16:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:06,195 INFO L93 Difference]: Finished difference Result 344 states and 831 transitions. [2020-10-15 16:16:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:16:06,196 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:16:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:06,196 INFO L225 Difference]: With dead ends: 344 [2020-10-15 16:16:06,197 INFO L226 Difference]: Without dead ends: 341 [2020-10-15 16:16:06,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=234, Invalid=518, Unknown=4, NotChecked=0, Total=756 [2020-10-15 16:16:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-15 16:16:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 268. [2020-10-15 16:16:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-15 16:16:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-15 16:16:06,201 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-15 16:16:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:06,201 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-15 16:16:06,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:16:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-15 16:16:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:06,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:06,202 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:06,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-15 16:16:06,403 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:06,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-15 16:16:06,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:06,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403417402] [2020-10-15 16:16:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:06,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403417402] [2020-10-15 16:16:06,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263404699] [2020-10-15 16:16:06,532 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:06,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:06,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:06,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:11,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:11,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:11,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391020727] [2020-10-15 16:16:11,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:11,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:11,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:11,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:16:11,411 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-15 16:16:15,752 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:16:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:16,192 INFO L93 Difference]: Finished difference Result 357 states and 866 transitions. [2020-10-15 16:16:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:16:16,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:16,194 INFO L225 Difference]: With dead ends: 357 [2020-10-15 16:16:16,195 INFO L226 Difference]: Without dead ends: 352 [2020-10-15 16:16:16,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:16:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-15 16:16:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 268. [2020-10-15 16:16:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-15 16:16:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-15 16:16:16,199 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-15 16:16:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:16,199 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-15 16:16:16,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-15 16:16:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:16,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:16,199 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:16,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:16,400 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:16,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-15 16:16:16,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:16,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692784823] [2020-10-15 16:16:16,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:16,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692784823] [2020-10-15 16:16:16,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109803459] [2020-10-15 16:16:16,533 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:16,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:16,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:16,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:16,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:16,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:16,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:16,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821762045] [2020-10-15 16:16:16,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:16,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:16,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:16,856 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-15 16:16:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:17,449 INFO L93 Difference]: Finished difference Result 339 states and 826 transitions. [2020-10-15 16:16:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:16:17,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:17,451 INFO L225 Difference]: With dead ends: 339 [2020-10-15 16:16:17,451 INFO L226 Difference]: Without dead ends: 335 [2020-10-15 16:16:17,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:16:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-15 16:16:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 264. [2020-10-15 16:16:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-15 16:16:17,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-15 16:16:17,456 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-15 16:16:17,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:17,456 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-15 16:16:17,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-15 16:16:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:17,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:17,457 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:17,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:17,657 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-15 16:16:17,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:17,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750971423] [2020-10-15 16:16:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:17,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750971423] [2020-10-15 16:16:17,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243772250] [2020-10-15 16:16:17,824 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:18,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:18,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:18,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979574461] [2020-10-15 16:16:18,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:18,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:18,071 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-10-15 16:16:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:18,243 INFO L93 Difference]: Finished difference Result 287 states and 713 transitions. [2020-10-15 16:16:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:18,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:18,245 INFO L225 Difference]: With dead ends: 287 [2020-10-15 16:16:18,245 INFO L226 Difference]: Without dead ends: 285 [2020-10-15 16:16:18,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:16:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-15 16:16:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-10-15 16:16:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-15 16:16:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-15 16:16:18,250 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-15 16:16:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:18,250 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-15 16:16:18,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-15 16:16:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:18,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:18,250 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:18,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:18,451 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-15 16:16:18,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:18,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296742131] [2020-10-15 16:16:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:18,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296742131] [2020-10-15 16:16:18,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198325163] [2020-10-15 16:16:18,608 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:18,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:18,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:18,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:18,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:18,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884236675] [2020-10-15 16:16:18,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:18,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:18,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:18,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:18,861 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-15 16:16:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:19,267 INFO L93 Difference]: Finished difference Result 317 states and 778 transitions. [2020-10-15 16:16:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:16:19,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:19,268 INFO L225 Difference]: With dead ends: 317 [2020-10-15 16:16:19,268 INFO L226 Difference]: Without dead ends: 314 [2020-10-15 16:16:19,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-15 16:16:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 264. [2020-10-15 16:16:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-15 16:16:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-15 16:16:19,273 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-15 16:16:19,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:19,273 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-15 16:16:19,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-15 16:16:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:19,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:19,274 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:19,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:19,474 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-15 16:16:19,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:19,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608931143] [2020-10-15 16:16:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:19,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608931143] [2020-10-15 16:16:19,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066668732] [2020-10-15 16:16:19,608 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:19,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:19,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:16:19,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:19,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:19,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-15 16:16:19,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527649837] [2020-10-15 16:16:19,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:16:19,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:19,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:16:19,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:16:19,754 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 14 states. [2020-10-15 16:16:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:20,139 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2020-10-15 16:16:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:16:20,140 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-10-15 16:16:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:20,141 INFO L225 Difference]: With dead ends: 337 [2020-10-15 16:16:20,141 INFO L226 Difference]: Without dead ends: 330 [2020-10-15 16:16:20,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:16:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-15 16:16:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 262. [2020-10-15 16:16:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-15 16:16:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-15 16:16:20,145 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-15 16:16:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:20,145 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-15 16:16:20,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:16:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-15 16:16:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:20,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:20,146 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:20,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:20,346 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-15 16:16:20,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:20,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763350250] [2020-10-15 16:16:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:20,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763350250] [2020-10-15 16:16:20,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008350242] [2020-10-15 16:16:20,502 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:20,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:20,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:20,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:20,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:20,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:20,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:20,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127044126] [2020-10-15 16:16:20,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:20,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:20,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:20,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:20,763 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-15 16:16:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:20,973 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2020-10-15 16:16:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:16:20,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:20,975 INFO L225 Difference]: With dead ends: 278 [2020-10-15 16:16:20,975 INFO L226 Difference]: Without dead ends: 276 [2020-10-15 16:16:20,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:16:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-15 16:16:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2020-10-15 16:16:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-15 16:16:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-15 16:16:20,979 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-15 16:16:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:20,979 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-15 16:16:20,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-15 16:16:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:20,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:20,980 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:21,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:21,180 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:21,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-15 16:16:21,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:21,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255474748] [2020-10-15 16:16:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:21,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255474748] [2020-10-15 16:16:21,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492563541] [2020-10-15 16:16:21,312 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:21,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:21,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:21,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:21,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:21,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:21,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741998345] [2020-10-15 16:16:21,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:21,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:21,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:21,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:21,580 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-15 16:16:22,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:22,032 INFO L93 Difference]: Finished difference Result 306 states and 753 transitions. [2020-10-15 16:16:22,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:16:22,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:22,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:22,033 INFO L225 Difference]: With dead ends: 306 [2020-10-15 16:16:22,033 INFO L226 Difference]: Without dead ends: 303 [2020-10-15 16:16:22,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:16:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-15 16:16:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2020-10-15 16:16:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-15 16:16:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 665 transitions. [2020-10-15 16:16:22,037 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 665 transitions. Word has length 14 [2020-10-15 16:16:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:22,037 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 665 transitions. [2020-10-15 16:16:22,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 665 transitions. [2020-10-15 16:16:22,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:22,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:22,038 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:22,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-15 16:16:22,239 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:22,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:22,240 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-15 16:16:22,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:22,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596546617] [2020-10-15 16:16:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:22,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596546617] [2020-10-15 16:16:22,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159807314] [2020-10-15 16:16:22,375 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:22,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:22,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:22,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:16:22,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:22,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:22,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:16:22,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489321232] [2020-10-15 16:16:22,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:16:22,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:22,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:16:22,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:16:22,449 INFO L87 Difference]: Start difference. First operand 260 states and 665 transitions. Second operand 11 states. [2020-10-15 16:16:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:22,659 INFO L93 Difference]: Finished difference Result 269 states and 677 transitions. [2020-10-15 16:16:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:16:22,660 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:16:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:22,661 INFO L225 Difference]: With dead ends: 269 [2020-10-15 16:16:22,661 INFO L226 Difference]: Without dead ends: 267 [2020-10-15 16:16:22,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:16:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-15 16:16:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2020-10-15 16:16:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-15 16:16:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 659 transitions. [2020-10-15 16:16:22,665 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 659 transitions. Word has length 14 [2020-10-15 16:16:22,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:22,665 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 659 transitions. [2020-10-15 16:16:22,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:16:22,665 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 659 transitions. [2020-10-15 16:16:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:22,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:22,666 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:22,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:22,867 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:22,867 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-15 16:16:22,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:22,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483886503] [2020-10-15 16:16:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:22,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483886503] [2020-10-15 16:16:22,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223226943] [2020-10-15 16:16:22,999 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:23,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:23,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:23,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:23,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:23,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162632255] [2020-10-15 16:16:23,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:23,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:23,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:23,284 INFO L87 Difference]: Start difference. First operand 256 states and 659 transitions. Second operand 17 states. [2020-10-15 16:16:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:23,913 INFO L93 Difference]: Finished difference Result 298 states and 754 transitions. [2020-10-15 16:16:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:16:23,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:23,915 INFO L225 Difference]: With dead ends: 298 [2020-10-15 16:16:23,915 INFO L226 Difference]: Without dead ends: 294 [2020-10-15 16:16:23,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:16:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-15 16:16:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 257. [2020-10-15 16:16:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-15 16:16:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 662 transitions. [2020-10-15 16:16:23,919 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 662 transitions. Word has length 14 [2020-10-15 16:16:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:23,919 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 662 transitions. [2020-10-15 16:16:23,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 662 transitions. [2020-10-15 16:16:23,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:23,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:23,920 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:24,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 16:16:24,121 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-15 16:16:24,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:24,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595913262] [2020-10-15 16:16:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:24,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595913262] [2020-10-15 16:16:24,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122723340] [2020-10-15 16:16:24,240 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:24,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:24,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:24,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:24,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:24,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:24,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079075815] [2020-10-15 16:16:24,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:24,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:24,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:24,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:24,513 INFO L87 Difference]: Start difference. First operand 257 states and 662 transitions. Second operand 17 states. [2020-10-15 16:16:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:25,016 INFO L93 Difference]: Finished difference Result 313 states and 786 transitions. [2020-10-15 16:16:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:25,017 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:25,018 INFO L225 Difference]: With dead ends: 313 [2020-10-15 16:16:25,018 INFO L226 Difference]: Without dead ends: 310 [2020-10-15 16:16:25,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:16:25,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-15 16:16:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2020-10-15 16:16:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-15 16:16:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 669 transitions. [2020-10-15 16:16:25,022 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 669 transitions. Word has length 14 [2020-10-15 16:16:25,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:25,022 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 669 transitions. [2020-10-15 16:16:25,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 669 transitions. [2020-10-15 16:16:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:25,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:25,023 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:25,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:25,223 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:25,224 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-15 16:16:25,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:25,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063572158] [2020-10-15 16:16:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:25,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063572158] [2020-10-15 16:16:25,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918042162] [2020-10-15 16:16:25,347 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:25,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:25,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:25,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:16:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:25,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:25,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:25,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:25,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969478311] [2020-10-15 16:16:25,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:25,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:25,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:25,627 INFO L87 Difference]: Start difference. First operand 259 states and 669 transitions. Second operand 17 states. [2020-10-15 16:16:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:26,377 INFO L93 Difference]: Finished difference Result 314 states and 795 transitions. [2020-10-15 16:16:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:16:26,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:26,378 INFO L225 Difference]: With dead ends: 314 [2020-10-15 16:16:26,378 INFO L226 Difference]: Without dead ends: 309 [2020-10-15 16:16:26,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:16:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-15 16:16:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 259. [2020-10-15 16:16:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-15 16:16:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 668 transitions. [2020-10-15 16:16:26,383 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 668 transitions. Word has length 14 [2020-10-15 16:16:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:26,383 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 668 transitions. [2020-10-15 16:16:26,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 668 transitions. [2020-10-15 16:16:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:26,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:26,383 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:26,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:26,586 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:26,587 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-15 16:16:26,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:26,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563836013] [2020-10-15 16:16:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:26,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563836013] [2020-10-15 16:16:26,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383704023] [2020-10-15 16:16:26,713 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:26,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:26,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:26,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:26,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:27,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:27,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:27,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:27,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578764780] [2020-10-15 16:16:27,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:27,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:27,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:27,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:27,073 INFO L87 Difference]: Start difference. First operand 259 states and 668 transitions. Second operand 17 states. [2020-10-15 16:16:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:27,795 INFO L93 Difference]: Finished difference Result 333 states and 837 transitions. [2020-10-15 16:16:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:16:27,796 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:27,797 INFO L225 Difference]: With dead ends: 333 [2020-10-15 16:16:27,797 INFO L226 Difference]: Without dead ends: 328 [2020-10-15 16:16:27,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:16:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-15 16:16:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 259. [2020-10-15 16:16:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-15 16:16:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 671 transitions. [2020-10-15 16:16:27,801 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 671 transitions. Word has length 14 [2020-10-15 16:16:27,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:27,801 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 671 transitions. [2020-10-15 16:16:27,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 671 transitions. [2020-10-15 16:16:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:27,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:27,805 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:28,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-15 16:16:28,015 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:28,015 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-15 16:16:28,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:28,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134527033] [2020-10-15 16:16:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:28,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134527033] [2020-10-15 16:16:28,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063879663] [2020-10-15 16:16:28,137 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:28,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:28,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:28,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:28,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:28,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:28,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913704685] [2020-10-15 16:16:28,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:28,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:28,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:28,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:28,721 INFO L87 Difference]: Start difference. First operand 259 states and 671 transitions. Second operand 17 states. [2020-10-15 16:16:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:29,538 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2020-10-15 16:16:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:16:29,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:29,540 INFO L225 Difference]: With dead ends: 350 [2020-10-15 16:16:29,540 INFO L226 Difference]: Without dead ends: 346 [2020-10-15 16:16:29,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:16:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-15 16:16:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 261. [2020-10-15 16:16:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-15 16:16:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 678 transitions. [2020-10-15 16:16:29,544 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 678 transitions. Word has length 14 [2020-10-15 16:16:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:29,545 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 678 transitions. [2020-10-15 16:16:29,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 678 transitions. [2020-10-15 16:16:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:29,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:29,545 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:29,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:29,746 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:29,747 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-15 16:16:29,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:29,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219615066] [2020-10-15 16:16:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:29,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219615066] [2020-10-15 16:16:29,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391377006] [2020-10-15 16:16:29,870 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:29,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:29,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:29,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:29,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:30,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:30,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:30,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122966559] [2020-10-15 16:16:30,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:30,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:30,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:30,221 INFO L87 Difference]: Start difference. First operand 261 states and 678 transitions. Second operand 17 states. [2020-10-15 16:16:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:31,535 INFO L93 Difference]: Finished difference Result 362 states and 911 transitions. [2020-10-15 16:16:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:16:31,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:31,537 INFO L225 Difference]: With dead ends: 362 [2020-10-15 16:16:31,537 INFO L226 Difference]: Without dead ends: 358 [2020-10-15 16:16:31,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:16:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-15 16:16:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 265. [2020-10-15 16:16:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-15 16:16:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 692 transitions. [2020-10-15 16:16:31,541 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 692 transitions. Word has length 14 [2020-10-15 16:16:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:31,541 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 692 transitions. [2020-10-15 16:16:31,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 692 transitions. [2020-10-15 16:16:31,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:31,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:31,542 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:31,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:31,743 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:31,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:31,743 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-15 16:16:31,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:31,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494845726] [2020-10-15 16:16:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:31,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494845726] [2020-10-15 16:16:31,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699872133] [2020-10-15 16:16:31,871 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:32,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:32,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:32,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:32,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274189718] [2020-10-15 16:16:32,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:32,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:32,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:32,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:32,252 INFO L87 Difference]: Start difference. First operand 265 states and 692 transitions. Second operand 17 states. [2020-10-15 16:16:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:33,302 INFO L93 Difference]: Finished difference Result 322 states and 822 transitions. [2020-10-15 16:16:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:16:33,304 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:33,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:33,304 INFO L225 Difference]: With dead ends: 322 [2020-10-15 16:16:33,305 INFO L226 Difference]: Without dead ends: 316 [2020-10-15 16:16:33,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=358, Invalid=698, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:16:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-15 16:16:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2020-10-15 16:16:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-15 16:16:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-15 16:16:33,308 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-15 16:16:33,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:33,309 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-15 16:16:33,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-15 16:16:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:33,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:33,309 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:33,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:33,510 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:33,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:33,510 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-15 16:16:33,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:33,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820139671] [2020-10-15 16:16:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:33,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820139671] [2020-10-15 16:16:33,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507447456] [2020-10-15 16:16:33,637 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:33,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:33,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:33,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:35,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:35,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:35,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:35,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061763960] [2020-10-15 16:16:35,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:35,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:35,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:35,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:16:35,987 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-15 16:16:40,347 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-15 16:16:44,675 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-15 16:16:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:45,807 INFO L93 Difference]: Finished difference Result 395 states and 997 transitions. [2020-10-15 16:16:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:16:45,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:45,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:45,808 INFO L225 Difference]: With dead ends: 395 [2020-10-15 16:16:45,809 INFO L226 Difference]: Without dead ends: 386 [2020-10-15 16:16:45,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 16:16:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-15 16:16:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 262. [2020-10-15 16:16:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-15 16:16:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-15 16:16:45,812 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-15 16:16:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:45,812 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-15 16:16:45,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-15 16:16:45,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:45,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:45,813 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:46,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:46,014 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:46,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:46,014 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-15 16:16:46,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:46,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45924661] [2020-10-15 16:16:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:46,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45924661] [2020-10-15 16:16:46,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898167651] [2020-10-15 16:16:46,141 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:46,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:46,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:46,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:46,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:46,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:46,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:46,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289282283] [2020-10-15 16:16:46,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:46,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:46,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:46,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:46,459 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-15 16:16:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:47,452 INFO L93 Difference]: Finished difference Result 358 states and 909 transitions. [2020-10-15 16:16:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:16:47,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:47,453 INFO L225 Difference]: With dead ends: 358 [2020-10-15 16:16:47,454 INFO L226 Difference]: Without dead ends: 353 [2020-10-15 16:16:47,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:16:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-15 16:16:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 262. [2020-10-15 16:16:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-15 16:16:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-15 16:16:47,459 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-15 16:16:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:47,459 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-15 16:16:47,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-15 16:16:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:47,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:47,459 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:47,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:47,660 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-15 16:16:47,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:47,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955460635] [2020-10-15 16:16:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:47,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955460635] [2020-10-15 16:16:47,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111276790] [2020-10-15 16:16:47,782 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:47,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:47,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:47,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:47,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:48,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:48,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:48,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183174692] [2020-10-15 16:16:48,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:48,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:48,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:48,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:48,168 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-15 16:16:48,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:48,773 INFO L93 Difference]: Finished difference Result 350 states and 871 transitions. [2020-10-15 16:16:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:16:48,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:48,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:48,776 INFO L225 Difference]: With dead ends: 350 [2020-10-15 16:16:48,776 INFO L226 Difference]: Without dead ends: 347 [2020-10-15 16:16:48,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:16:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-15 16:16:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2020-10-15 16:16:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-15 16:16:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 696 transitions. [2020-10-15 16:16:48,780 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 696 transitions. Word has length 14 [2020-10-15 16:16:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:48,780 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 696 transitions. [2020-10-15 16:16:48,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 696 transitions. [2020-10-15 16:16:48,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:48,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:48,781 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:48,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:48,982 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:48,982 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-15 16:16:48,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:48,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978200868] [2020-10-15 16:16:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:49,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978200868] [2020-10-15 16:16:49,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362658772] [2020-10-15 16:16:49,114 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:49,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:49,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:49,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:49,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:54,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:54,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:54,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343271865] [2020-10-15 16:16:54,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:54,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:54,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:54,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:16:54,352 INFO L87 Difference]: Start difference. First operand 265 states and 696 transitions. Second operand 17 states. [2020-10-15 16:16:58,737 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:17:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:05,214 INFO L93 Difference]: Finished difference Result 380 states and 945 transitions. [2020-10-15 16:17:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:05,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:05,216 INFO L225 Difference]: With dead ends: 380 [2020-10-15 16:17:05,216 INFO L226 Difference]: Without dead ends: 375 [2020-10-15 16:17:05,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:17:05,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-15 16:17:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 266. [2020-10-15 16:17:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-15 16:17:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 698 transitions. [2020-10-15 16:17:05,221 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 698 transitions. Word has length 14 [2020-10-15 16:17:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:05,221 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 698 transitions. [2020-10-15 16:17:05,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 698 transitions. [2020-10-15 16:17:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:05,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:05,221 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:05,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 16:17:05,422 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:05,423 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-15 16:17:05,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:05,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138809357] [2020-10-15 16:17:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:05,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138809357] [2020-10-15 16:17:05,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960841997] [2020-10-15 16:17:05,549 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:05,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:05,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:05,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:05,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:05,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:05,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:05,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016253349] [2020-10-15 16:17:05,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:05,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:05,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:05,925 INFO L87 Difference]: Start difference. First operand 266 states and 698 transitions. Second operand 17 states. [2020-10-15 16:17:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:06,552 INFO L93 Difference]: Finished difference Result 366 states and 912 transitions. [2020-10-15 16:17:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:06,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:06,554 INFO L225 Difference]: With dead ends: 366 [2020-10-15 16:17:06,554 INFO L226 Difference]: Without dead ends: 362 [2020-10-15 16:17:06,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-15 16:17:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 264. [2020-10-15 16:17:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-15 16:17:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 692 transitions. [2020-10-15 16:17:06,558 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 692 transitions. Word has length 14 [2020-10-15 16:17:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:06,558 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 692 transitions. [2020-10-15 16:17:06,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 692 transitions. [2020-10-15 16:17:06,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:06,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:06,559 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:06,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-15 16:17:06,762 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:06,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-15 16:17:06,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:06,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552400821] [2020-10-15 16:17:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:06,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552400821] [2020-10-15 16:17:06,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482797564] [2020-10-15 16:17:06,908 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:06,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:06,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:09,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:09,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:09,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105732314] [2020-10-15 16:17:09,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:09,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:09,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:09,861 INFO L87 Difference]: Start difference. First operand 264 states and 692 transitions. Second operand 17 states. [2020-10-15 16:17:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:10,841 INFO L93 Difference]: Finished difference Result 357 states and 890 transitions. [2020-10-15 16:17:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:17:10,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:10,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:10,843 INFO L225 Difference]: With dead ends: 357 [2020-10-15 16:17:10,843 INFO L226 Difference]: Without dead ends: 354 [2020-10-15 16:17:10,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:17:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-15 16:17:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 266. [2020-10-15 16:17:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-15 16:17:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 700 transitions. [2020-10-15 16:17:10,848 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 700 transitions. Word has length 14 [2020-10-15 16:17:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:10,849 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 700 transitions. [2020-10-15 16:17:10,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 700 transitions. [2020-10-15 16:17:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:10,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:10,849 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:11,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-15 16:17:11,053 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:11,054 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-15 16:17:11,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:11,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157359461] [2020-10-15 16:17:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157359461] [2020-10-15 16:17:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457923926] [2020-10-15 16:17:11,194 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:11,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:11,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:11,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:11,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:12,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:12,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:12,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106971990] [2020-10-15 16:17:12,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:12,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:12,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:12,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:12,571 INFO L87 Difference]: Start difference. First operand 266 states and 700 transitions. Second operand 17 states. [2020-10-15 16:17:17,071 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:17:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:32,022 INFO L93 Difference]: Finished difference Result 401 states and 995 transitions. [2020-10-15 16:17:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:17:32,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:32,024 INFO L225 Difference]: With dead ends: 401 [2020-10-15 16:17:32,024 INFO L226 Difference]: Without dead ends: 396 [2020-10-15 16:17:32,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-15 16:17:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-15 16:17:32,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 269. [2020-10-15 16:17:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 16:17:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 709 transitions. [2020-10-15 16:17:32,028 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 709 transitions. Word has length 14 [2020-10-15 16:17:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:32,029 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 709 transitions. [2020-10-15 16:17:32,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 709 transitions. [2020-10-15 16:17:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:32,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:32,029 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:32,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:32,230 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-15 16:17:32,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:32,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041204736] [2020-10-15 16:17:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:32,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041204736] [2020-10-15 16:17:32,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015937559] [2020-10-15 16:17:32,368 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:32,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:32,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:32,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:32,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:32,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:32,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180103488] [2020-10-15 16:17:32,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:32,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:32,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:32,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:32,716 INFO L87 Difference]: Start difference. First operand 269 states and 709 transitions. Second operand 17 states. [2020-10-15 16:17:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:33,730 INFO L93 Difference]: Finished difference Result 352 states and 890 transitions. [2020-10-15 16:17:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:17:33,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:33,732 INFO L225 Difference]: With dead ends: 352 [2020-10-15 16:17:33,732 INFO L226 Difference]: Without dead ends: 349 [2020-10-15 16:17:33,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:17:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-15 16:17:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 271. [2020-10-15 16:17:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-15 16:17:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 716 transitions. [2020-10-15 16:17:33,736 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 716 transitions. Word has length 14 [2020-10-15 16:17:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:33,736 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 716 transitions. [2020-10-15 16:17:33,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:33,737 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 716 transitions. [2020-10-15 16:17:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:33,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:33,737 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:33,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:33,938 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-15 16:17:33,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:33,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751911316] [2020-10-15 16:17:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:34,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751911316] [2020-10-15 16:17:34,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263686795] [2020-10-15 16:17:34,068 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:34,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:34,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:34,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:34,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:34,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:34,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305271957] [2020-10-15 16:17:34,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:34,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:34,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:34,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:34,440 INFO L87 Difference]: Start difference. First operand 271 states and 716 transitions. Second operand 17 states. [2020-10-15 16:17:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:35,744 INFO L93 Difference]: Finished difference Result 323 states and 827 transitions. [2020-10-15 16:17:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:17:35,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:35,746 INFO L225 Difference]: With dead ends: 323 [2020-10-15 16:17:35,746 INFO L226 Difference]: Without dead ends: 316 [2020-10-15 16:17:35,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=394, Invalid=796, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:17:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-15 16:17:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 271. [2020-10-15 16:17:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-15 16:17:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 713 transitions. [2020-10-15 16:17:35,751 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 713 transitions. Word has length 14 [2020-10-15 16:17:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:35,751 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 713 transitions. [2020-10-15 16:17:35,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 713 transitions. [2020-10-15 16:17:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:35,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:35,751 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:35,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-15 16:17:35,952 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-15 16:17:35,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:35,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817016072] [2020-10-15 16:17:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:36,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817016072] [2020-10-15 16:17:36,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352250461] [2020-10-15 16:17:36,091 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:36,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:36,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:36,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:36,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:36,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:36,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:36,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:36,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:36,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:36,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:36,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:36,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:36,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:36,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179342092] [2020-10-15 16:17:36,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:36,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:36,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:36,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:36,492 INFO L87 Difference]: Start difference. First operand 271 states and 713 transitions. Second operand 17 states. [2020-10-15 16:17:38,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:38,008 INFO L93 Difference]: Finished difference Result 384 states and 973 transitions. [2020-10-15 16:17:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:17:38,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:38,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:38,010 INFO L225 Difference]: With dead ends: 384 [2020-10-15 16:17:38,010 INFO L226 Difference]: Without dead ends: 379 [2020-10-15 16:17:38,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:17:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-15 16:17:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 269. [2020-10-15 16:17:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 16:17:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 707 transitions. [2020-10-15 16:17:38,014 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 707 transitions. Word has length 14 [2020-10-15 16:17:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:38,014 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 707 transitions. [2020-10-15 16:17:38,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 707 transitions. [2020-10-15 16:17:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:38,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:38,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:38,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:38,216 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:38,216 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-15 16:17:38,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:38,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924095168] [2020-10-15 16:17:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924095168] [2020-10-15 16:17:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182613553] [2020-10-15 16:17:38,354 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:38,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:17:38,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:38,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:41,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:41,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:41,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612894232] [2020-10-15 16:17:41,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:41,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:41,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:41,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:17:41,947 INFO L87 Difference]: Start difference. First operand 269 states and 707 transitions. Second operand 17 states. [2020-10-15 16:17:46,384 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:17:50,669 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:17:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:51,409 INFO L93 Difference]: Finished difference Result 403 states and 1011 transitions. [2020-10-15 16:17:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:17:51,410 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:51,411 INFO L225 Difference]: With dead ends: 403 [2020-10-15 16:17:51,411 INFO L226 Difference]: Without dead ends: 398 [2020-10-15 16:17:51,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 16:17:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-15 16:17:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 273. [2020-10-15 16:17:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-15 16:17:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 721 transitions. [2020-10-15 16:17:51,417 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 721 transitions. Word has length 14 [2020-10-15 16:17:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:51,417 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 721 transitions. [2020-10-15 16:17:51,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 721 transitions. [2020-10-15 16:17:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:51,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:51,418 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:51,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-15 16:17:51,621 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:51,621 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-15 16:17:51,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:51,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287444366] [2020-10-15 16:17:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:51,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287444366] [2020-10-15 16:17:51,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739340944] [2020-10-15 16:17:51,759 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:51,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:56,360 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 16:17:56,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:56,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:56,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:56,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:56,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888217606] [2020-10-15 16:17:56,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:56,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:56,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:56,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=182, Unknown=3, NotChecked=0, Total=272 [2020-10-15 16:17:56,434 INFO L87 Difference]: Start difference. First operand 273 states and 721 transitions. Second operand 17 states. [2020-10-15 16:18:00,842 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:18:05,179 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 16:18:20,706 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-15 16:18:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:22,143 INFO L93 Difference]: Finished difference Result 447 states and 1135 transitions. [2020-10-15 16:18:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:18:22,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:22,145 INFO L225 Difference]: With dead ends: 447 [2020-10-15 16:18:22,145 INFO L226 Difference]: Without dead ends: 437 [2020-10-15 16:18:22,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=434, Invalid=964, Unknown=8, NotChecked=0, Total=1406 [2020-10-15 16:18:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-15 16:18:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 274. [2020-10-15 16:18:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-15 16:18:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 726 transitions. [2020-10-15 16:18:22,150 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 726 transitions. Word has length 14 [2020-10-15 16:18:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:22,150 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 726 transitions. [2020-10-15 16:18:22,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:22,150 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 726 transitions. [2020-10-15 16:18:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:22,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:22,150 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:22,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:22,351 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-10-15 16:18:22,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:22,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654535420] [2020-10-15 16:18:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:22,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654535420] [2020-10-15 16:18:22,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626827335] [2020-10-15 16:18:22,496 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:22,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:22,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:22,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:22,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:24,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:25,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:25,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:25,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008924764] [2020-10-15 16:18:25,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:25,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:25,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:25,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:18:25,009 INFO L87 Difference]: Start difference. First operand 274 states and 726 transitions. Second operand 17 states. [2020-10-15 16:18:25,574 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-15 16:18:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:27,259 INFO L93 Difference]: Finished difference Result 425 states and 1076 transitions. [2020-10-15 16:18:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:18:27,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:27,261 INFO L225 Difference]: With dead ends: 425 [2020-10-15 16:18:27,261 INFO L226 Difference]: Without dead ends: 415 [2020-10-15 16:18:27,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-15 16:18:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-15 16:18:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 268. [2020-10-15 16:18:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-15 16:18:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 712 transitions. [2020-10-15 16:18:27,266 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 712 transitions. Word has length 14 [2020-10-15 16:18:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:27,266 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 712 transitions. [2020-10-15 16:18:27,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 712 transitions. [2020-10-15 16:18:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:27,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:27,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:27,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:27,468 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:27,468 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-10-15 16:18:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:27,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329571210] [2020-10-15 16:18:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:27,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329571210] [2020-10-15 16:18:27,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915069667] [2020-10-15 16:18:27,603 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:27,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:27,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:27,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:27,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:27,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:27,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755425952] [2020-10-15 16:18:27,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:27,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:27,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:27,967 INFO L87 Difference]: Start difference. First operand 268 states and 712 transitions. Second operand 17 states. [2020-10-15 16:18:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:28,639 INFO L93 Difference]: Finished difference Result 368 states and 929 transitions. [2020-10-15 16:18:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:28,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:28,641 INFO L225 Difference]: With dead ends: 368 [2020-10-15 16:18:28,641 INFO L226 Difference]: Without dead ends: 364 [2020-10-15 16:18:28,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-15 16:18:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 267. [2020-10-15 16:18:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-15 16:18:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 709 transitions. [2020-10-15 16:18:28,645 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 709 transitions. Word has length 14 [2020-10-15 16:18:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:28,646 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 709 transitions. [2020-10-15 16:18:28,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 709 transitions. [2020-10-15 16:18:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:28,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:28,646 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:28,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 16:18:28,847 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-10-15 16:18:28,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:28,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705745013] [2020-10-15 16:18:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:28,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705745013] [2020-10-15 16:18:28,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540810544] [2020-10-15 16:18:28,987 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:29,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:29,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:29,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:29,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:29,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932661129] [2020-10-15 16:18:29,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:29,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:29,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:29,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:29,376 INFO L87 Difference]: Start difference. First operand 267 states and 709 transitions. Second operand 17 states. [2020-10-15 16:18:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:30,430 INFO L93 Difference]: Finished difference Result 384 states and 970 transitions. [2020-10-15 16:18:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:18:30,432 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:30,433 INFO L225 Difference]: With dead ends: 384 [2020-10-15 16:18:30,433 INFO L226 Difference]: Without dead ends: 380 [2020-10-15 16:18:30,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:18:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-15 16:18:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 268. [2020-10-15 16:18:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-15 16:18:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 711 transitions. [2020-10-15 16:18:30,437 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 711 transitions. Word has length 14 [2020-10-15 16:18:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:30,437 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 711 transitions. [2020-10-15 16:18:30,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 711 transitions. [2020-10-15 16:18:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:30,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:30,438 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:30,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 16:18:30,639 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-10-15 16:18:30,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:30,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605259693] [2020-10-15 16:18:30,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:30,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605259693] [2020-10-15 16:18:30,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185984679] [2020-10-15 16:18:30,803 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:30,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:18:30,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:30,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:30,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:31,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:31,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:31,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:31,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481336254] [2020-10-15 16:18:31,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:31,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:31,180 INFO L87 Difference]: Start difference. First operand 268 states and 711 transitions. Second operand 17 states. [2020-10-15 16:18:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:32,838 INFO L93 Difference]: Finished difference Result 416 states and 1051 transitions. [2020-10-15 16:18:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:18:32,839 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:32,840 INFO L225 Difference]: With dead ends: 416 [2020-10-15 16:18:32,840 INFO L226 Difference]: Without dead ends: 410 [2020-10-15 16:18:32,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:18:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-15 16:18:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 266. [2020-10-15 16:18:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-15 16:18:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 704 transitions. [2020-10-15 16:18:32,847 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 704 transitions. Word has length 14 [2020-10-15 16:18:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:32,847 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 704 transitions. [2020-10-15 16:18:32,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:32,848 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 704 transitions. [2020-10-15 16:18:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:32,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:32,848 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:33,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 16:18:33,051 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:33,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:33,051 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-10-15 16:18:33,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:33,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026213010] [2020-10-15 16:18:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:33,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026213010] [2020-10-15 16:18:33,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693511220] [2020-10-15 16:18:33,190 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:33,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:33,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:33,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:33,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:33,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765596902] [2020-10-15 16:18:33,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:33,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:33,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:33,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:33,502 INFO L87 Difference]: Start difference. First operand 266 states and 704 transitions. Second operand 17 states. [2020-10-15 16:18:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:34,083 INFO L93 Difference]: Finished difference Result 355 states and 889 transitions. [2020-10-15 16:18:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:18:34,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:34,086 INFO L225 Difference]: With dead ends: 355 [2020-10-15 16:18:34,086 INFO L226 Difference]: Without dead ends: 352 [2020-10-15 16:18:34,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:18:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-15 16:18:34,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 270. [2020-10-15 16:18:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-15 16:18:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 718 transitions. [2020-10-15 16:18:34,090 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 718 transitions. Word has length 14 [2020-10-15 16:18:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:34,091 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 718 transitions. [2020-10-15 16:18:34,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 718 transitions. [2020-10-15 16:18:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:34,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:34,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:34,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-15 16:18:34,293 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-10-15 16:18:34,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:34,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153905545] [2020-10-15 16:18:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:34,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153905545] [2020-10-15 16:18:34,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41710622] [2020-10-15 16:18:34,430 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:34,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:34,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:34,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:34,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884691436] [2020-10-15 16:18:34,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:34,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:34,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:34,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:34,767 INFO L87 Difference]: Start difference. First operand 270 states and 718 transitions. Second operand 17 states. [2020-10-15 16:18:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:35,413 INFO L93 Difference]: Finished difference Result 390 states and 972 transitions. [2020-10-15 16:18:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:18:35,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:35,415 INFO L225 Difference]: With dead ends: 390 [2020-10-15 16:18:35,415 INFO L226 Difference]: Without dead ends: 385 [2020-10-15 16:18:35,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:18:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-15 16:18:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 271. [2020-10-15 16:18:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-15 16:18:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 721 transitions. [2020-10-15 16:18:35,419 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 721 transitions. Word has length 14 [2020-10-15 16:18:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:35,420 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 721 transitions. [2020-10-15 16:18:35,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 721 transitions. [2020-10-15 16:18:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:35,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:35,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:35,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 16:18:35,621 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:35,621 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-10-15 16:18:35,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:35,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832452245] [2020-10-15 16:18:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:35,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832452245] [2020-10-15 16:18:35,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440271519] [2020-10-15 16:18:35,764 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:35,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:35,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:35,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:36,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:36,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:36,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522494015] [2020-10-15 16:18:36,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:36,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:36,092 INFO L87 Difference]: Start difference. First operand 271 states and 721 transitions. Second operand 17 states. [2020-10-15 16:18:36,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:36,622 INFO L93 Difference]: Finished difference Result 392 states and 981 transitions. [2020-10-15 16:18:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:36,624 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:36,624 INFO L225 Difference]: With dead ends: 392 [2020-10-15 16:18:36,625 INFO L226 Difference]: Without dead ends: 387 [2020-10-15 16:18:36,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-15 16:18:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 270. [2020-10-15 16:18:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-15 16:18:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 718 transitions. [2020-10-15 16:18:36,629 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 718 transitions. Word has length 14 [2020-10-15 16:18:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:36,629 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 718 transitions. [2020-10-15 16:18:36,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 718 transitions. [2020-10-15 16:18:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:36,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:36,630 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:36,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-15 16:18:36,831 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:36,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:36,831 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-10-15 16:18:36,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:36,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379445459] [2020-10-15 16:18:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:36,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379445459] [2020-10-15 16:18:36,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446976855] [2020-10-15 16:18:36,975 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:37,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:37,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:37,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:37,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:37,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:37,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974841808] [2020-10-15 16:18:37,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:37,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:37,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:37,333 INFO L87 Difference]: Start difference. First operand 270 states and 718 transitions. Second operand 17 states. [2020-10-15 16:18:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:37,841 INFO L93 Difference]: Finished difference Result 359 states and 898 transitions. [2020-10-15 16:18:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:37,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:37,843 INFO L225 Difference]: With dead ends: 359 [2020-10-15 16:18:37,843 INFO L226 Difference]: Without dead ends: 343 [2020-10-15 16:18:37,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:18:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-15 16:18:37,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 268. [2020-10-15 16:18:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-15 16:18:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 710 transitions. [2020-10-15 16:18:37,848 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 710 transitions. Word has length 14 [2020-10-15 16:18:37,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:37,848 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 710 transitions. [2020-10-15 16:18:37,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:37,848 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 710 transitions. [2020-10-15 16:18:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:37,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:37,848 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:38,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:38,049 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:38,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:38,050 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-10-15 16:18:38,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:38,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313015095] [2020-10-15 16:18:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:38,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313015095] [2020-10-15 16:18:38,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132496858] [2020-10-15 16:18:38,186 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:38,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:38,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:38,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:38,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:38,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:38,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:38,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500433139] [2020-10-15 16:18:38,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:38,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:38,495 INFO L87 Difference]: Start difference. First operand 268 states and 710 transitions. Second operand 17 states. [2020-10-15 16:18:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:39,476 INFO L93 Difference]: Finished difference Result 369 states and 917 transitions. [2020-10-15 16:18:39,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:18:39,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:39,478 INFO L225 Difference]: With dead ends: 369 [2020-10-15 16:18:39,479 INFO L226 Difference]: Without dead ends: 366 [2020-10-15 16:18:39,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:18:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-15 16:18:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 271. [2020-10-15 16:18:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-15 16:18:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 721 transitions. [2020-10-15 16:18:39,486 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 721 transitions. Word has length 14 [2020-10-15 16:18:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:39,486 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 721 transitions. [2020-10-15 16:18:39,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 721 transitions. [2020-10-15 16:18:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:39,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:39,487 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:39,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-15 16:18:39,691 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:39,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:39,691 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-10-15 16:18:39,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:39,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446586213] [2020-10-15 16:18:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446586213] [2020-10-15 16:18:39,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869856152] [2020-10-15 16:18:39,832 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:39,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:39,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:39,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:40,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:40,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:40,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067774049] [2020-10-15 16:18:40,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:40,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:40,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:40,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:40,162 INFO L87 Difference]: Start difference. First operand 271 states and 721 transitions. Second operand 17 states. [2020-10-15 16:18:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:41,129 INFO L93 Difference]: Finished difference Result 425 states and 1047 transitions. [2020-10-15 16:18:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:18:41,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:41,131 INFO L225 Difference]: With dead ends: 425 [2020-10-15 16:18:41,131 INFO L226 Difference]: Without dead ends: 410 [2020-10-15 16:18:41,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:18:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-15 16:18:41,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 276. [2020-10-15 16:18:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-15 16:18:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 733 transitions. [2020-10-15 16:18:41,141 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 733 transitions. Word has length 14 [2020-10-15 16:18:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:41,142 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 733 transitions. [2020-10-15 16:18:41,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 733 transitions. [2020-10-15 16:18:41,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:41,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:41,142 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:41,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:41,343 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-10-15 16:18:41,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:41,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721526745] [2020-10-15 16:18:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:41,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721526745] [2020-10-15 16:18:41,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76549680] [2020-10-15 16:18:41,483 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:41,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:41,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:41,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:41,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:41,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:41,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:41,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610295030] [2020-10-15 16:18:41,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:41,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:41,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:41,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:41,795 INFO L87 Difference]: Start difference. First operand 276 states and 733 transitions. Second operand 17 states. [2020-10-15 16:18:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:42,578 INFO L93 Difference]: Finished difference Result 404 states and 1006 transitions. [2020-10-15 16:18:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:18:42,579 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:42,580 INFO L225 Difference]: With dead ends: 404 [2020-10-15 16:18:42,581 INFO L226 Difference]: Without dead ends: 399 [2020-10-15 16:18:42,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:18:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-15 16:18:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 274. [2020-10-15 16:18:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-15 16:18:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 728 transitions. [2020-10-15 16:18:42,585 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 728 transitions. Word has length 14 [2020-10-15 16:18:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:42,585 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 728 transitions. [2020-10-15 16:18:42,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 728 transitions. [2020-10-15 16:18:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:42,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:42,585 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:42,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:42,786 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:42,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:42,787 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-10-15 16:18:42,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:42,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943202653] [2020-10-15 16:18:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:42,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943202653] [2020-10-15 16:18:42,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635469152] [2020-10-15 16:18:42,984 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:43,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:43,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:43,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:43,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089538213] [2020-10-15 16:18:43,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:43,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:43,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:43,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:43,340 INFO L87 Difference]: Start difference. First operand 274 states and 728 transitions. Second operand 17 states. [2020-10-15 16:18:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:44,471 INFO L93 Difference]: Finished difference Result 369 states and 920 transitions. [2020-10-15 16:18:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:18:44,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:44,474 INFO L225 Difference]: With dead ends: 369 [2020-10-15 16:18:44,474 INFO L226 Difference]: Without dead ends: 366 [2020-10-15 16:18:44,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:18:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-15 16:18:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 276. [2020-10-15 16:18:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-15 16:18:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 736 transitions. [2020-10-15 16:18:44,478 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 736 transitions. Word has length 14 [2020-10-15 16:18:44,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:44,479 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 736 transitions. [2020-10-15 16:18:44,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 736 transitions. [2020-10-15 16:18:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:44,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:44,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:44,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:44,680 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:44,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:44,680 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-10-15 16:18:44,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:44,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094872169] [2020-10-15 16:18:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:44,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094872169] [2020-10-15 16:18:44,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533876927] [2020-10-15 16:18:44,826 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:44,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:44,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:44,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:44,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:45,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:45,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:45,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434430866] [2020-10-15 16:18:45,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:45,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:45,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:45,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:45,149 INFO L87 Difference]: Start difference. First operand 276 states and 736 transitions. Second operand 17 states. [2020-10-15 16:18:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:46,311 INFO L93 Difference]: Finished difference Result 401 states and 999 transitions. [2020-10-15 16:18:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:18:46,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:46,313 INFO L225 Difference]: With dead ends: 401 [2020-10-15 16:18:46,314 INFO L226 Difference]: Without dead ends: 396 [2020-10-15 16:18:46,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:18:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-15 16:18:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 278. [2020-10-15 16:18:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-15 16:18:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 742 transitions. [2020-10-15 16:18:46,318 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 742 transitions. Word has length 14 [2020-10-15 16:18:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:46,318 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 742 transitions. [2020-10-15 16:18:46,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:46,319 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 742 transitions. [2020-10-15 16:18:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:46,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:46,319 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:46,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 16:18:46,520 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:46,520 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-10-15 16:18:46,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:46,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572322391] [2020-10-15 16:18:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:46,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572322391] [2020-10-15 16:18:46,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274480885] [2020-10-15 16:18:46,666 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:46,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:46,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:46,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:18:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:46,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:46,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-15 16:18:46,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278513007] [2020-10-15 16:18:46,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:18:46,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:46,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:18:46,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:18:46,877 INFO L87 Difference]: Start difference. First operand 278 states and 742 transitions. Second operand 16 states. [2020-10-15 16:18:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:47,860 INFO L93 Difference]: Finished difference Result 360 states and 898 transitions. [2020-10-15 16:18:47,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:18:47,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-10-15 16:18:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:47,863 INFO L225 Difference]: With dead ends: 360 [2020-10-15 16:18:47,863 INFO L226 Difference]: Without dead ends: 357 [2020-10-15 16:18:47,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:18:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-15 16:18:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 280. [2020-10-15 16:18:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-15 16:18:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 749 transitions. [2020-10-15 16:18:47,867 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 749 transitions. Word has length 14 [2020-10-15 16:18:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:47,867 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 749 transitions. [2020-10-15 16:18:47,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:18:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 749 transitions. [2020-10-15 16:18:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:47,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:47,868 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:48,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:48,069 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-10-15 16:18:48,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:48,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673237974] [2020-10-15 16:18:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:48,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673237974] [2020-10-15 16:18:48,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445246873] [2020-10-15 16:18:48,231 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:48,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:48,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:48,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:48,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:48,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:48,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:48,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:48,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688060203] [2020-10-15 16:18:48,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:48,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:48,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:48,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:48,529 INFO L87 Difference]: Start difference. First operand 280 states and 749 transitions. Second operand 17 states. [2020-10-15 16:18:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:49,521 INFO L93 Difference]: Finished difference Result 316 states and 812 transitions. [2020-10-15 16:18:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:18:49,522 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:49,523 INFO L225 Difference]: With dead ends: 316 [2020-10-15 16:18:49,523 INFO L226 Difference]: Without dead ends: 308 [2020-10-15 16:18:49,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=436, Invalid=896, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:18:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-15 16:18:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 280. [2020-10-15 16:18:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-15 16:18:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 745 transitions. [2020-10-15 16:18:49,527 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 745 transitions. Word has length 14 [2020-10-15 16:18:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:49,531 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 745 transitions. [2020-10-15 16:18:49,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:49,531 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 745 transitions. [2020-10-15 16:18:49,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:49,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:49,532 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:49,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 16:18:49,742 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:49,742 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-10-15 16:18:49,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:49,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891923929] [2020-10-15 16:18:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:49,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891923929] [2020-10-15 16:18:49,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797095725] [2020-10-15 16:18:49,895 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:49,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:18:49,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:49,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:49,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:50,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:50,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:50,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:50,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229335100] [2020-10-15 16:18:50,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:50,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:50,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:50,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:50,232 INFO L87 Difference]: Start difference. First operand 280 states and 745 transitions. Second operand 17 states. [2020-10-15 16:18:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:51,667 INFO L93 Difference]: Finished difference Result 392 states and 995 transitions. [2020-10-15 16:18:51,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:18:51,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:51,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:51,670 INFO L225 Difference]: With dead ends: 392 [2020-10-15 16:18:51,670 INFO L226 Difference]: Without dead ends: 387 [2020-10-15 16:18:51,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:18:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-15 16:18:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 278. [2020-10-15 16:18:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-15 16:18:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 739 transitions. [2020-10-15 16:18:51,674 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 739 transitions. Word has length 14 [2020-10-15 16:18:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:51,675 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 739 transitions. [2020-10-15 16:18:51,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 739 transitions. [2020-10-15 16:18:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:51,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:51,675 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:51,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 16:18:51,876 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:51,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-10-15 16:18:51,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:51,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664687497] [2020-10-15 16:18:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:52,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664687497] [2020-10-15 16:18:52,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754017359] [2020-10-15 16:18:52,029 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:52,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:18:52,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:52,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:52,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:52,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:52,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:52,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383188739] [2020-10-15 16:18:52,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:52,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:52,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:52,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:52,354 INFO L87 Difference]: Start difference. First operand 278 states and 739 transitions. Second operand 17 states. [2020-10-15 16:18:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:53,703 INFO L93 Difference]: Finished difference Result 409 states and 1032 transitions. [2020-10-15 16:18:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:18:53,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:53,706 INFO L225 Difference]: With dead ends: 409 [2020-10-15 16:18:53,706 INFO L226 Difference]: Without dead ends: 404 [2020-10-15 16:18:53,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:18:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-15 16:18:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 282. [2020-10-15 16:18:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-15 16:18:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2020-10-15 16:18:53,710 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 14 [2020-10-15 16:18:53,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:53,711 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2020-10-15 16:18:53,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2020-10-15 16:18:53,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:53,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:53,711 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:53,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:53,912 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:53,912 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-10-15 16:18:53,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:53,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059722371] [2020-10-15 16:18:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:54,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059722371] [2020-10-15 16:18:54,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550603766] [2020-10-15 16:18:54,066 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:54,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:54,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:54,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:54,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:54,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949325741] [2020-10-15 16:18:54,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:54,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:54,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:54,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:54,415 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand 17 states. [2020-10-15 16:18:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:55,986 INFO L93 Difference]: Finished difference Result 409 states and 1039 transitions. [2020-10-15 16:18:55,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:18:55,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:55,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:55,988 INFO L225 Difference]: With dead ends: 409 [2020-10-15 16:18:55,989 INFO L226 Difference]: Without dead ends: 404 [2020-10-15 16:18:55,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:18:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-15 16:18:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 282. [2020-10-15 16:18:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-15 16:18:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2020-10-15 16:18:55,992 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 14 [2020-10-15 16:18:55,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:55,993 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2020-10-15 16:18:55,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2020-10-15 16:18:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:55,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:55,993 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:56,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 16:18:56,194 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash 116556078, now seen corresponding path program 188 times [2020-10-15 16:18:56,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:56,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278188473] [2020-10-15 16:18:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:56,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278188473] [2020-10-15 16:18:56,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014066923] [2020-10-15 16:18:56,348 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:56,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:56,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:56,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:56,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:56,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:56,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:56,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:56,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922011639] [2020-10-15 16:18:56,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:56,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:56,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:56,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:56,651 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand 17 states. [2020-10-15 16:18:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:58,541 INFO L93 Difference]: Finished difference Result 436 states and 1104 transitions. [2020-10-15 16:18:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:18:58,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:58,543 INFO L225 Difference]: With dead ends: 436 [2020-10-15 16:18:58,544 INFO L226 Difference]: Without dead ends: 426 [2020-10-15 16:18:58,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:18:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-15 16:18:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 275. [2020-10-15 16:18:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-15 16:18:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 734 transitions. [2020-10-15 16:18:58,548 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 734 transitions. Word has length 14 [2020-10-15 16:18:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:58,549 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 734 transitions. [2020-10-15 16:18:58,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 734 transitions. [2020-10-15 16:18:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:58,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:58,549 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:58,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-15 16:18:58,750 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:58,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash 116764398, now seen corresponding path program 189 times [2020-10-15 16:18:58,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:58,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553160849] [2020-10-15 16:18:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:58,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553160849] [2020-10-15 16:18:58,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979082523] [2020-10-15 16:18:58,903 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:58,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:58,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:58,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:58,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:59,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:59,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:59,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501881215] [2020-10-15 16:18:59,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:59,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:59,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:59,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:59,233 INFO L87 Difference]: Start difference. First operand 275 states and 734 transitions. Second operand 17 states. [2020-10-15 16:19:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:00,280 INFO L93 Difference]: Finished difference Result 421 states and 1054 transitions. [2020-10-15 16:19:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:19:00,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:00,283 INFO L225 Difference]: With dead ends: 421 [2020-10-15 16:19:00,283 INFO L226 Difference]: Without dead ends: 407 [2020-10-15 16:19:00,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:19:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-15 16:19:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 277. [2020-10-15 16:19:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-15 16:19:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 743 transitions. [2020-10-15 16:19:00,287 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 743 transitions. Word has length 14 [2020-10-15 16:19:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:00,287 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 743 transitions. [2020-10-15 16:19:00,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 743 transitions. [2020-10-15 16:19:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:00,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:00,288 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:00,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:00,488 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash 117427488, now seen corresponding path program 190 times [2020-10-15 16:19:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:00,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331442523] [2020-10-15 16:19:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:00,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331442523] [2020-10-15 16:19:00,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312709028] [2020-10-15 16:19:00,697 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:00,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:00,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:00,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:00,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:01,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:01,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:01,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520466088] [2020-10-15 16:19:01,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:01,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:01,116 INFO L87 Difference]: Start difference. First operand 277 states and 743 transitions. Second operand 17 states. [2020-10-15 16:19:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:02,326 INFO L93 Difference]: Finished difference Result 410 states and 1043 transitions. [2020-10-15 16:19:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:02,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:02,329 INFO L225 Difference]: With dead ends: 410 [2020-10-15 16:19:02,329 INFO L226 Difference]: Without dead ends: 405 [2020-10-15 16:19:02,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:19:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-10-15 16:19:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 281. [2020-10-15 16:19:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-15 16:19:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 757 transitions. [2020-10-15 16:19:02,333 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 757 transitions. Word has length 14 [2020-10-15 16:19:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:02,333 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 757 transitions. [2020-10-15 16:19:02,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 757 transitions. [2020-10-15 16:19:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:02,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:02,334 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:02,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:02,535 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 191 times [2020-10-15 16:19:02,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:02,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330843070] [2020-10-15 16:19:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:02,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330843070] [2020-10-15 16:19:02,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029336216] [2020-10-15 16:19:02,703 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:02,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:19:02,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:02,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:02,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:02,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:02,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:02,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:02,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106649125] [2020-10-15 16:19:02,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:02,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:02,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:02,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:02,985 INFO L87 Difference]: Start difference. First operand 281 states and 757 transitions. Second operand 17 states. [2020-10-15 16:19:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:04,450 INFO L93 Difference]: Finished difference Result 431 states and 1100 transitions. [2020-10-15 16:19:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:19:04,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:04,453 INFO L225 Difference]: With dead ends: 431 [2020-10-15 16:19:04,453 INFO L226 Difference]: Without dead ends: 421 [2020-10-15 16:19:04,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:19:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-15 16:19:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 282. [2020-10-15 16:19:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-15 16:19:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 762 transitions. [2020-10-15 16:19:04,457 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 762 transitions. Word has length 14 [2020-10-15 16:19:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:04,458 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 762 transitions. [2020-10-15 16:19:04,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 762 transitions. [2020-10-15 16:19:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:04,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:04,458 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:04,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:04,659 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:04,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:04,659 INFO L82 PathProgramCache]: Analyzing trace with hash 117449808, now seen corresponding path program 192 times [2020-10-15 16:19:04,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:04,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102020116] [2020-10-15 16:19:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:04,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102020116] [2020-10-15 16:19:04,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001082617] [2020-10-15 16:19:04,825 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:04,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:19:04,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:04,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:04,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:05,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:19:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:05,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:05,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:05,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574103352] [2020-10-15 16:19:05,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:05,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:05,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:05,105 INFO L87 Difference]: Start difference. First operand 282 states and 762 transitions. Second operand 17 states. [2020-10-15 16:19:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:06,518 INFO L93 Difference]: Finished difference Result 457 states and 1163 transitions. [2020-10-15 16:19:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:19:06,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:06,521 INFO L225 Difference]: With dead ends: 457 [2020-10-15 16:19:06,521 INFO L226 Difference]: Without dead ends: 447 [2020-10-15 16:19:06,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:19:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-15 16:19:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 278. [2020-10-15 16:19:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-15 16:19:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 748 transitions. [2020-10-15 16:19:06,525 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 748 transitions. Word has length 14 [2020-10-15 16:19:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:06,525 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 748 transitions. [2020-10-15 16:19:06,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 748 transitions. [2020-10-15 16:19:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:06,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:06,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:06,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:06,727 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:06,727 INFO L82 PathProgramCache]: Analyzing trace with hash 117478638, now seen corresponding path program 193 times [2020-10-15 16:19:06,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:06,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788128418] [2020-10-15 16:19:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:06,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788128418] [2020-10-15 16:19:06,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053207711] [2020-10-15 16:19:06,884 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:06,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:07,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:07,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:07,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:07,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559850688] [2020-10-15 16:19:07,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:07,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:07,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:07,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:07,183 INFO L87 Difference]: Start difference. First operand 278 states and 748 transitions. Second operand 17 states. [2020-10-15 16:19:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:08,766 INFO L93 Difference]: Finished difference Result 441 states and 1123 transitions. [2020-10-15 16:19:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:19:08,768 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:08,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:08,769 INFO L225 Difference]: With dead ends: 441 [2020-10-15 16:19:08,769 INFO L226 Difference]: Without dead ends: 431 [2020-10-15 16:19:08,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:19:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-15 16:19:08,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 277. [2020-10-15 16:19:08,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-15 16:19:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 744 transitions. [2020-10-15 16:19:08,773 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 744 transitions. Word has length 14 [2020-10-15 16:19:08,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:08,773 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 744 transitions. [2020-10-15 16:19:08,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 744 transitions. [2020-10-15 16:19:08,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:08,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:08,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:08,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:08,975 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash 144470028, now seen corresponding path program 194 times [2020-10-15 16:19:08,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:08,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576302627] [2020-10-15 16:19:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:09,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576302627] [2020-10-15 16:19:09,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102536915] [2020-10-15 16:19:09,137 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:09,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:09,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:09,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:09,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:09,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:09,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:09,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044142656] [2020-10-15 16:19:09,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:09,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:09,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:09,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:09,521 INFO L87 Difference]: Start difference. First operand 277 states and 744 transitions. Second operand 17 states. [2020-10-15 16:19:10,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:10,860 INFO L93 Difference]: Finished difference Result 401 states and 1008 transitions. [2020-10-15 16:19:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:10,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:10,863 INFO L225 Difference]: With dead ends: 401 [2020-10-15 16:19:10,864 INFO L226 Difference]: Without dead ends: 397 [2020-10-15 16:19:10,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:19:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-15 16:19:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 276. [2020-10-15 16:19:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-15 16:19:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 741 transitions. [2020-10-15 16:19:10,869 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 741 transitions. Word has length 14 [2020-10-15 16:19:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:10,869 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 741 transitions. [2020-10-15 16:19:10,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 741 transitions. [2020-10-15 16:19:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:10,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:10,870 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:11,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 16:19:11,081 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:11,082 INFO L82 PathProgramCache]: Analyzing trace with hash 145133118, now seen corresponding path program 195 times [2020-10-15 16:19:11,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:11,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065057622] [2020-10-15 16:19:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:11,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065057622] [2020-10-15 16:19:11,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70332263] [2020-10-15 16:19:11,240 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:11,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:19:11,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:19:11,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:11,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:11,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:11,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121104873] [2020-10-15 16:19:11,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:11,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:11,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:11,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:11,614 INFO L87 Difference]: Start difference. First operand 276 states and 741 transitions. Second operand 17 states. [2020-10-15 16:19:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:13,240 INFO L93 Difference]: Finished difference Result 402 states and 1016 transitions. [2020-10-15 16:19:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:19:13,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:13,243 INFO L225 Difference]: With dead ends: 402 [2020-10-15 16:19:13,243 INFO L226 Difference]: Without dead ends: 398 [2020-10-15 16:19:13,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:19:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-15 16:19:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 277. [2020-10-15 16:19:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-15 16:19:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 743 transitions. [2020-10-15 16:19:13,247 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 743 transitions. Word has length 14 [2020-10-15 16:19:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:13,247 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 743 transitions. [2020-10-15 16:19:13,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 743 transitions. [2020-10-15 16:19:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:13,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:13,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:13,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 16:19:13,449 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash 145155438, now seen corresponding path program 196 times [2020-10-15 16:19:13,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:13,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466112433] [2020-10-15 16:19:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:13,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466112433] [2020-10-15 16:19:13,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832290203] [2020-10-15 16:19:13,610 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:13,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:13,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:13,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:13,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:13,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:13,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:13,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:13,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812148269] [2020-10-15 16:19:13,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:13,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:13,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:13,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:13,967 INFO L87 Difference]: Start difference. First operand 277 states and 743 transitions. Second operand 17 states. [2020-10-15 16:19:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:16,211 INFO L93 Difference]: Finished difference Result 433 states and 1104 transitions. [2020-10-15 16:19:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:19:16,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:16,214 INFO L225 Difference]: With dead ends: 433 [2020-10-15 16:19:16,214 INFO L226 Difference]: Without dead ends: 427 [2020-10-15 16:19:16,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:19:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-15 16:19:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 275. [2020-10-15 16:19:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-15 16:19:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 736 transitions. [2020-10-15 16:19:16,218 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 736 transitions. Word has length 14 [2020-10-15 16:19:16,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:16,218 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 736 transitions. [2020-10-15 16:19:16,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:16,218 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 736 transitions. [2020-10-15 16:19:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:16,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:16,218 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:16,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-15 16:19:16,419 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash 145184268, now seen corresponding path program 197 times [2020-10-15 16:19:16,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:16,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174070466] [2020-10-15 16:19:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:16,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174070466] [2020-10-15 16:19:16,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750560354] [2020-10-15 16:19:16,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:16,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:19:16,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:16,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:16,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:21,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:25,267 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-15 16:19:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:25,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:25,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:19:25,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703727935] [2020-10-15 16:19:25,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:19:25,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:25,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:19:25,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-15 16:19:25,270 INFO L87 Difference]: Start difference. First operand 275 states and 736 transitions. Second operand 18 states. [2020-10-15 16:19:29,507 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-15 16:19:31,389 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-10-15 16:19:35,854 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 16:19:36,054 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 23 [2020-10-15 16:19:42,538 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-15 16:19:44,752 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 16:20:02,282 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-10-15 16:20:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:46,762 INFO L93 Difference]: Finished difference Result 443 states and 1112 transitions. [2020-10-15 16:20:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:20:46,764 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:20:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:46,765 INFO L225 Difference]: With dead ends: 443 [2020-10-15 16:20:46,765 INFO L226 Difference]: Without dead ends: 437 [2020-10-15 16:20:46,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=560, Invalid=1408, Unknown=12, NotChecked=0, Total=1980 [2020-10-15 16:20:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-15 16:20:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 273. [2020-10-15 16:20:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-15 16:20:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 726 transitions. [2020-10-15 16:20:46,770 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 726 transitions. Word has length 14 [2020-10-15 16:20:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:46,770 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 726 transitions. [2020-10-15 16:20:46,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:20:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 726 transitions. [2020-10-15 16:20:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:46,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:46,771 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:46,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 16:20:46,972 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:46,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:46,972 INFO L82 PathProgramCache]: Analyzing trace with hash 146086430, now seen corresponding path program 198 times [2020-10-15 16:20:46,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:46,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713494105] [2020-10-15 16:20:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:47,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713494105] [2020-10-15 16:20:47,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130939215] [2020-10-15 16:20:47,135 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:47,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:20:47,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:47,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:47,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:47,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:47,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:47,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987974453] [2020-10-15 16:20:47,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:47,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:47,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:47,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:47,463 INFO L87 Difference]: Start difference. First operand 273 states and 726 transitions. Second operand 17 states. [2020-10-15 16:20:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:48,038 INFO L93 Difference]: Finished difference Result 351 states and 887 transitions. [2020-10-15 16:20:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:20:48,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:48,040 INFO L225 Difference]: With dead ends: 351 [2020-10-15 16:20:48,041 INFO L226 Difference]: Without dead ends: 338 [2020-10-15 16:20:48,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:20:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-15 16:20:48,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 274. [2020-10-15 16:20:48,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-15 16:20:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 727 transitions. [2020-10-15 16:20:48,045 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 727 transitions. Word has length 14 [2020-10-15 16:20:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:48,045 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 727 transitions. [2020-10-15 16:20:48,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:48,045 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 727 transitions. [2020-10-15 16:20:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:48,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:48,045 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:48,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-15 16:20:48,246 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:48,247 INFO L82 PathProgramCache]: Analyzing trace with hash 146108750, now seen corresponding path program 199 times [2020-10-15 16:20:48,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:48,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555500227] [2020-10-15 16:20:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:48,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555500227] [2020-10-15 16:20:48,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469769127] [2020-10-15 16:20:48,413 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:48,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:48,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:48,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:48,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:48,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522397514] [2020-10-15 16:20:48,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:48,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:48,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:48,700 INFO L87 Difference]: Start difference. First operand 274 states and 727 transitions. Second operand 17 states. [2020-10-15 16:20:49,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:49,395 INFO L93 Difference]: Finished difference Result 354 states and 891 transitions. [2020-10-15 16:20:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:20:49,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:49,398 INFO L225 Difference]: With dead ends: 354 [2020-10-15 16:20:49,398 INFO L226 Difference]: Without dead ends: 330 [2020-10-15 16:20:49,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:20:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-15 16:20:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 267. [2020-10-15 16:20:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-15 16:20:49,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 713 transitions. [2020-10-15 16:20:49,402 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 713 transitions. Word has length 14 [2020-10-15 16:20:49,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:49,402 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 713 transitions. [2020-10-15 16:20:49,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 713 transitions. [2020-10-15 16:20:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:49,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:49,403 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:49,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:49,604 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:49,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2034084541, now seen corresponding path program 200 times [2020-10-15 16:20:49,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:49,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016667340] [2020-10-15 16:20:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:49,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016667340] [2020-10-15 16:20:49,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389249905] [2020-10-15 16:20:49,781 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:49,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:20:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:49,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:50,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:50,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:50,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926594328] [2020-10-15 16:20:50,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:50,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:50,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:50,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:50,112 INFO L87 Difference]: Start difference. First operand 267 states and 713 transitions. Second operand 17 states. [2020-10-15 16:20:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:50,656 INFO L93 Difference]: Finished difference Result 347 states and 876 transitions. [2020-10-15 16:20:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:20:50,658 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:50,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:50,659 INFO L225 Difference]: With dead ends: 347 [2020-10-15 16:20:50,659 INFO L226 Difference]: Without dead ends: 344 [2020-10-15 16:20:50,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:20:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-15 16:20:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-10-15 16:20:50,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-15 16:20:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 722 transitions. [2020-10-15 16:20:50,664 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 722 transitions. Word has length 14 [2020-10-15 16:20:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:50,664 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 722 transitions. [2020-10-15 16:20:50,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 722 transitions. [2020-10-15 16:20:50,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:50,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:50,664 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:50,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-15 16:20:50,865 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:50,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:50,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2034085502, now seen corresponding path program 201 times [2020-10-15 16:20:50,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:50,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546886304] [2020-10-15 16:20:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:51,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546886304] [2020-10-15 16:20:51,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249883802] [2020-10-15 16:20:51,042 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:51,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:20:51,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:51,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:51,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:51,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:51,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:51,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107607190] [2020-10-15 16:20:51,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:51,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:51,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:51,402 INFO L87 Difference]: Start difference. First operand 270 states and 722 transitions. Second operand 17 states. [2020-10-15 16:20:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:52,068 INFO L93 Difference]: Finished difference Result 367 states and 918 transitions. [2020-10-15 16:20:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:20:52,069 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:52,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:52,070 INFO L225 Difference]: With dead ends: 367 [2020-10-15 16:20:52,070 INFO L226 Difference]: Without dead ends: 363 [2020-10-15 16:20:52,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:20:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-15 16:20:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 269. [2020-10-15 16:20:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 16:20:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 719 transitions. [2020-10-15 16:20:52,074 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 719 transitions. Word has length 14 [2020-10-15 16:20:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:52,074 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 719 transitions. [2020-10-15 16:20:52,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 719 transitions. [2020-10-15 16:20:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:52,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:52,075 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:52,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:52,275 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2034114332, now seen corresponding path program 202 times [2020-10-15 16:20:52,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:52,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147257837] [2020-10-15 16:20:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:52,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147257837] [2020-10-15 16:20:52,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114460704] [2020-10-15 16:20:52,462 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:52,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:20:52,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:54,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:54,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:54,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777588117] [2020-10-15 16:20:54,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:54,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:54,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:54,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:54,360 INFO L87 Difference]: Start difference. First operand 269 states and 719 transitions. Second operand 17 states. [2020-10-15 16:20:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:55,362 INFO L93 Difference]: Finished difference Result 391 states and 972 transitions. [2020-10-15 16:20:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:20:55,364 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:55,365 INFO L225 Difference]: With dead ends: 391 [2020-10-15 16:20:55,365 INFO L226 Difference]: Without dead ends: 386 [2020-10-15 16:20:55,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:20:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-15 16:20:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 274. [2020-10-15 16:20:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-15 16:20:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 732 transitions. [2020-10-15 16:20:55,369 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 732 transitions. Word has length 14 [2020-10-15 16:20:55,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:55,370 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 732 transitions. [2020-10-15 16:20:55,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 732 transitions. [2020-10-15 16:20:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:55,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:55,370 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:55,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:55,572 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:55,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:55,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009023, now seen corresponding path program 203 times [2020-10-15 16:20:55,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:55,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207742595] [2020-10-15 16:20:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:55,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207742595] [2020-10-15 16:20:55,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324702706] [2020-10-15 16:20:55,782 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:55,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:20:55,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:55,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:56,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:56,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:56,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132184615] [2020-10-15 16:20:56,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:56,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:56,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:56,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:56,135 INFO L87 Difference]: Start difference. First operand 274 states and 732 transitions. Second operand 17 states. [2020-10-15 16:20:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:56,775 INFO L93 Difference]: Finished difference Result 391 states and 967 transitions. [2020-10-15 16:20:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:20:56,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:56,778 INFO L225 Difference]: With dead ends: 391 [2020-10-15 16:20:56,779 INFO L226 Difference]: Without dead ends: 373 [2020-10-15 16:20:56,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:20:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-15 16:20:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 274. [2020-10-15 16:20:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-15 16:20:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 728 transitions. [2020-10-15 16:20:56,790 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 728 transitions. Word has length 14 [2020-10-15 16:20:56,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:56,790 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 728 transitions. [2020-10-15 16:20:56,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:56,790 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 728 transitions. [2020-10-15 16:20:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:56,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:56,790 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:56,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:56,991 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2062713692, now seen corresponding path program 204 times [2020-10-15 16:20:56,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:56,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608470473] [2020-10-15 16:20:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:57,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608470473] [2020-10-15 16:20:57,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900717485] [2020-10-15 16:20:57,198 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:57,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:20:57,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:57,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:57,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:57,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:57,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:57,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104311724] [2020-10-15 16:20:57,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:57,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:57,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:57,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:57,562 INFO L87 Difference]: Start difference. First operand 274 states and 728 transitions. Second operand 17 states. [2020-10-15 16:20:58,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:58,248 INFO L93 Difference]: Finished difference Result 362 states and 910 transitions. [2020-10-15 16:20:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:20:58,250 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:58,251 INFO L225 Difference]: With dead ends: 362 [2020-10-15 16:20:58,251 INFO L226 Difference]: Without dead ends: 357 [2020-10-15 16:20:58,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:20:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-15 16:20:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 271. [2020-10-15 16:20:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-15 16:20:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 721 transitions. [2020-10-15 16:20:58,256 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 721 transitions. Word has length 14 [2020-10-15 16:20:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:58,256 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 721 transitions. [2020-10-15 16:20:58,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:58,256 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 721 transitions. [2020-10-15 16:20:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:58,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:58,257 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:58,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 16:20:58,462 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:58,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:58,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667004, now seen corresponding path program 205 times [2020-10-15 16:20:58,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:58,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095269731] [2020-10-15 16:20:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:58,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095269731] [2020-10-15 16:20:58,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97356150] [2020-10-15 16:20:58,711 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:58,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:58,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:59,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:59,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:59,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557162991] [2020-10-15 16:20:59,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:59,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:59,061 INFO L87 Difference]: Start difference. First operand 271 states and 721 transitions. Second operand 17 states. [2020-10-15 16:20:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:59,445 INFO L93 Difference]: Finished difference Result 339 states and 853 transitions. [2020-10-15 16:20:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:20:59,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:59,447 INFO L225 Difference]: With dead ends: 339 [2020-10-15 16:20:59,448 INFO L226 Difference]: Without dead ends: 326 [2020-10-15 16:20:59,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:20:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-15 16:20:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 265. [2020-10-15 16:20:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-15 16:20:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 709 transitions. [2020-10-15 16:20:59,452 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 709 transitions. Word has length 14 [2020-10-15 16:20:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:59,452 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 709 transitions. [2020-10-15 16:20:59,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 709 transitions. [2020-10-15 16:20:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:59,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:59,452 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:59,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 16:20:59,656 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:59,656 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 206 times [2020-10-15 16:20:59,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:59,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636133079] [2020-10-15 16:20:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:59,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636133079] [2020-10-15 16:20:59,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385076053] [2020-10-15 16:20:59,819 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:59,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:20:59,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:59,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:59,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:00,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:00,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:00,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049542956] [2020-10-15 16:21:00,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:00,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:00,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:00,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:00,188 INFO L87 Difference]: Start difference. First operand 265 states and 709 transitions. Second operand 17 states. [2020-10-15 16:21:00,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:00,776 INFO L93 Difference]: Finished difference Result 346 states and 872 transitions. [2020-10-15 16:21:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:00,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:00,778 INFO L225 Difference]: With dead ends: 346 [2020-10-15 16:21:00,778 INFO L226 Difference]: Without dead ends: 343 [2020-10-15 16:21:00,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:21:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-15 16:21:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 267. [2020-10-15 16:21:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-15 16:21:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 715 transitions. [2020-10-15 16:21:00,783 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 715 transitions. Word has length 14 [2020-10-15 16:21:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:00,783 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 715 transitions. [2020-10-15 16:21:00,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 715 transitions. [2020-10-15 16:21:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:00,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:00,784 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:00,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 16:21:00,985 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash 313363212, now seen corresponding path program 207 times [2020-10-15 16:21:00,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:00,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435938424] [2020-10-15 16:21:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:01,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435938424] [2020-10-15 16:21:01,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860376893] [2020-10-15 16:21:01,153 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:01,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:21:01,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:01,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:01,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:01,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:01,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:01,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838211923] [2020-10-15 16:21:01,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:01,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:01,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:01,535 INFO L87 Difference]: Start difference. First operand 267 states and 715 transitions. Second operand 17 states. [2020-10-15 16:21:02,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:02,192 INFO L93 Difference]: Finished difference Result 361 states and 905 transitions. [2020-10-15 16:21:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:02,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:02,195 INFO L225 Difference]: With dead ends: 361 [2020-10-15 16:21:02,195 INFO L226 Difference]: Without dead ends: 357 [2020-10-15 16:21:02,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:21:02,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-15 16:21:02,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 266. [2020-10-15 16:21:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-15 16:21:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 712 transitions. [2020-10-15 16:21:02,199 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 712 transitions. Word has length 14 [2020-10-15 16:21:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:02,199 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 712 transitions. [2020-10-15 16:21:02,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 712 transitions. [2020-10-15 16:21:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:02,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:02,200 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:02,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 16:21:02,401 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:02,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:02,401 INFO L82 PathProgramCache]: Analyzing trace with hash 313392042, now seen corresponding path program 208 times [2020-10-15 16:21:02,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:02,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085043992] [2020-10-15 16:21:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:02,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085043992] [2020-10-15 16:21:02,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353007297] [2020-10-15 16:21:02,571 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:02,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:21:02,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:02,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:03,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:03,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:03,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32179783] [2020-10-15 16:21:03,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:03,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:03,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:03,113 INFO L87 Difference]: Start difference. First operand 266 states and 712 transitions. Second operand 17 states. [2020-10-15 16:21:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:04,225 INFO L93 Difference]: Finished difference Result 401 states and 990 transitions. [2020-10-15 16:21:04,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:21:04,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:04,229 INFO L225 Difference]: With dead ends: 401 [2020-10-15 16:21:04,229 INFO L226 Difference]: Without dead ends: 388 [2020-10-15 16:21:04,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:21:04,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-15 16:21:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 271. [2020-10-15 16:21:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-15 16:21:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 725 transitions. [2020-10-15 16:21:04,233 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 725 transitions. Word has length 14 [2020-10-15 16:21:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:04,233 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 725 transitions. [2020-10-15 16:21:04,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 725 transitions. [2020-10-15 16:21:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:04,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:04,234 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:04,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 16:21:04,434 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:04,435 INFO L82 PathProgramCache]: Analyzing trace with hash 314286733, now seen corresponding path program 209 times [2020-10-15 16:21:04,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:04,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579945324] [2020-10-15 16:21:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:04,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579945324] [2020-10-15 16:21:04,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329697286] [2020-10-15 16:21:04,616 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:04,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:21:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:04,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:04,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:04,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:04,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854561263] [2020-10-15 16:21:04,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:04,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:04,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:04,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:04,963 INFO L87 Difference]: Start difference. First operand 271 states and 725 transitions. Second operand 17 states. [2020-10-15 16:21:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:05,771 INFO L93 Difference]: Finished difference Result 381 states and 946 transitions. [2020-10-15 16:21:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:21:05,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:05,774 INFO L225 Difference]: With dead ends: 381 [2020-10-15 16:21:05,774 INFO L226 Difference]: Without dead ends: 363 [2020-10-15 16:21:05,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-15 16:21:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 270. [2020-10-15 16:21:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-15 16:21:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 719 transitions. [2020-10-15 16:21:05,778 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 719 transitions. Word has length 14 [2020-10-15 16:21:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:05,778 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 719 transitions. [2020-10-15 16:21:05,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 719 transitions. [2020-10-15 16:21:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:05,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:05,779 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:05,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-15 16:21:05,980 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 210 times [2020-10-15 16:21:05,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:05,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149589051] [2020-10-15 16:21:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:06,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149589051] [2020-10-15 16:21:06,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17668758] [2020-10-15 16:21:06,149 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:06,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:21:06,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:06,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:06,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:06,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:06,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:06,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519338421] [2020-10-15 16:21:06,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:06,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:06,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:06,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:06,513 INFO L87 Difference]: Start difference. First operand 270 states and 719 transitions. Second operand 17 states. [2020-10-15 16:21:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:07,311 INFO L93 Difference]: Finished difference Result 354 states and 884 transitions. [2020-10-15 16:21:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:21:07,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:07,314 INFO L225 Difference]: With dead ends: 354 [2020-10-15 16:21:07,314 INFO L226 Difference]: Without dead ends: 351 [2020-10-15 16:21:07,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:21:07,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-15 16:21:07,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 271. [2020-10-15 16:21:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-15 16:21:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 722 transitions. [2020-10-15 16:21:07,318 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 722 transitions. Word has length 14 [2020-10-15 16:21:07,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:07,318 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 722 transitions. [2020-10-15 16:21:07,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:07,318 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 722 transitions. [2020-10-15 16:21:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:07,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:07,319 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:07,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 16:21:07,519 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:07,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:07,520 INFO L82 PathProgramCache]: Analyzing trace with hash 950592702, now seen corresponding path program 211 times [2020-10-15 16:21:07,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:07,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442032496] [2020-10-15 16:21:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:07,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442032496] [2020-10-15 16:21:07,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594129770] [2020-10-15 16:21:07,686 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:07,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:08,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:08,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:08,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113740109] [2020-10-15 16:21:08,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:08,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:08,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:08,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:08,070 INFO L87 Difference]: Start difference. First operand 271 states and 722 transitions. Second operand 17 states. [2020-10-15 16:21:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:08,846 INFO L93 Difference]: Finished difference Result 359 states and 897 transitions. [2020-10-15 16:21:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:21:08,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:08,850 INFO L225 Difference]: With dead ends: 359 [2020-10-15 16:21:08,850 INFO L226 Difference]: Without dead ends: 355 [2020-10-15 16:21:08,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-15 16:21:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 270. [2020-10-15 16:21:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-15 16:21:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 719 transitions. [2020-10-15 16:21:08,853 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 719 transitions. Word has length 14 [2020-10-15 16:21:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:08,853 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 719 transitions. [2020-10-15 16:21:08,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 719 transitions. [2020-10-15 16:21:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:08,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:08,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:09,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-15 16:21:09,055 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:09,055 INFO L82 PathProgramCache]: Analyzing trace with hash 950621532, now seen corresponding path program 212 times [2020-10-15 16:21:09,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:09,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906029510] [2020-10-15 16:21:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:09,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906029510] [2020-10-15 16:21:09,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351229081] [2020-10-15 16:21:09,236 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:09,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:21:09,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:09,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:09,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:09,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:09,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120220077] [2020-10-15 16:21:09,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:09,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:09,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:09,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:09,713 INFO L87 Difference]: Start difference. First operand 270 states and 719 transitions. Second operand 17 states. [2020-10-15 16:21:10,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:10,939 INFO L93 Difference]: Finished difference Result 386 states and 956 transitions. [2020-10-15 16:21:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:21:10,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:10,943 INFO L225 Difference]: With dead ends: 386 [2020-10-15 16:21:10,943 INFO L226 Difference]: Without dead ends: 381 [2020-10-15 16:21:10,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:21:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-15 16:21:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 269. [2020-10-15 16:21:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 16:21:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 715 transitions. [2020-10-15 16:21:10,946 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 715 transitions. Word has length 14 [2020-10-15 16:21:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:10,947 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 715 transitions. [2020-10-15 16:21:10,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 715 transitions. [2020-10-15 16:21:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:10,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:10,947 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:11,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:11,148 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 213 times [2020-10-15 16:21:11,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:11,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924733661] [2020-10-15 16:21:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:11,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924733661] [2020-10-15 16:21:11,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094795238] [2020-10-15 16:21:11,323 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:11,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:21:11,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:11,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:11,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:11,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:11,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:11,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738589622] [2020-10-15 16:21:11,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:11,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:11,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:11,681 INFO L87 Difference]: Start difference. First operand 269 states and 715 transitions. Second operand 17 states. [2020-10-15 16:21:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:12,658 INFO L93 Difference]: Finished difference Result 348 states and 872 transitions. [2020-10-15 16:21:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:21:12,660 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:12,661 INFO L225 Difference]: With dead ends: 348 [2020-10-15 16:21:12,661 INFO L226 Difference]: Without dead ends: 345 [2020-10-15 16:21:12,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:21:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-15 16:21:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 269. [2020-10-15 16:21:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 16:21:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 715 transitions. [2020-10-15 16:21:12,665 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 715 transitions. Word has length 14 [2020-10-15 16:21:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:12,665 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 715 transitions. [2020-10-15 16:21:12,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 715 transitions. [2020-10-15 16:21:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:12,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:12,666 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:12,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:12,867 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:12,867 INFO L82 PathProgramCache]: Analyzing trace with hash 971148492, now seen corresponding path program 214 times [2020-10-15 16:21:12,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:12,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95683358] [2020-10-15 16:21:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:13,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95683358] [2020-10-15 16:21:13,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875186633] [2020-10-15 16:21:13,043 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:13,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:21:13,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:13,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:13,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:13,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:13,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441833545] [2020-10-15 16:21:13,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:13,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:13,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:13,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:13,414 INFO L87 Difference]: Start difference. First operand 269 states and 715 transitions. Second operand 17 states. [2020-10-15 16:21:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:14,387 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2020-10-15 16:21:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:21:14,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:14,390 INFO L225 Difference]: With dead ends: 350 [2020-10-15 16:21:14,390 INFO L226 Difference]: Without dead ends: 346 [2020-10-15 16:21:14,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:21:14,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-15 16:21:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-15 16:21:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 16:21:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 714 transitions. [2020-10-15 16:21:14,396 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 714 transitions. Word has length 14 [2020-10-15 16:21:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:14,396 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 714 transitions. [2020-10-15 16:21:14,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 714 transitions. [2020-10-15 16:21:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:14,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:14,397 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:14,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:14,607 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:14,607 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 215 times [2020-10-15 16:21:14,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:14,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981342382] [2020-10-15 16:21:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:14,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981342382] [2020-10-15 16:21:14,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965851579] [2020-10-15 16:21:14,791 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:14,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:21:14,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:14,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:15,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:15,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:15,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419136039] [2020-10-15 16:21:15,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:15,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:15,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:15,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:15,135 INFO L87 Difference]: Start difference. First operand 269 states and 714 transitions. Second operand 17 states. [2020-10-15 16:21:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:16,222 INFO L93 Difference]: Finished difference Result 334 states and 840 transitions. [2020-10-15 16:21:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:21:16,224 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:16,225 INFO L225 Difference]: With dead ends: 334 [2020-10-15 16:21:16,225 INFO L226 Difference]: Without dead ends: 331 [2020-10-15 16:21:16,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:21:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-15 16:21:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 269. [2020-10-15 16:21:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 16:21:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 713 transitions. [2020-10-15 16:21:16,229 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 713 transitions. Word has length 14 [2020-10-15 16:21:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:16,230 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 713 transitions. [2020-10-15 16:21:16,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 713 transitions. [2020-10-15 16:21:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:16,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:16,230 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:16,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 16:21:16,431 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash 971831980, now seen corresponding path program 216 times [2020-10-15 16:21:16,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:16,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741776852] [2020-10-15 16:21:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741776852] [2020-10-15 16:21:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071398835] [2020-10-15 16:21:16,608 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:16,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:21:16,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:16,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:16,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:16,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:21:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:16,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:16,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:16,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208805527] [2020-10-15 16:21:16,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:16,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:16,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:16,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:16,916 INFO L87 Difference]: Start difference. First operand 269 states and 713 transitions. Second operand 17 states. [2020-10-15 16:21:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:17,632 INFO L93 Difference]: Finished difference Result 284 states and 731 transitions. [2020-10-15 16:21:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:21:17,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:17,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:17,634 INFO L225 Difference]: With dead ends: 284 [2020-10-15 16:21:17,634 INFO L226 Difference]: Without dead ends: 274 [2020-10-15 16:21:17,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-15 16:21:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 261. [2020-10-15 16:21:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-15 16:21:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 686 transitions. [2020-10-15 16:21:17,639 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 686 transitions. Word has length 14 [2020-10-15 16:21:17,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:17,639 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 686 transitions. [2020-10-15 16:21:17,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:17,639 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 686 transitions. [2020-10-15 16:21:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:17,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:17,639 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:17,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:17,840 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:17,840 INFO L82 PathProgramCache]: Analyzing trace with hash 971832941, now seen corresponding path program 217 times [2020-10-15 16:21:17,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:17,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750596117] [2020-10-15 16:21:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:18,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750596117] [2020-10-15 16:21:18,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967122631] [2020-10-15 16:21:18,027 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:18,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:18,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:18,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:21:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:18,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:18,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:18,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200029550] [2020-10-15 16:21:18,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:18,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:18,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:18,422 INFO L87 Difference]: Start difference. First operand 261 states and 686 transitions. Second operand 17 states. [2020-10-15 16:21:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:19,956 INFO L93 Difference]: Finished difference Result 365 states and 917 transitions. [2020-10-15 16:21:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:21:19,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:19,958 INFO L225 Difference]: With dead ends: 365 [2020-10-15 16:21:19,959 INFO L226 Difference]: Without dead ends: 360 [2020-10-15 16:21:19,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:21:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-15 16:21:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 259. [2020-10-15 16:21:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-15 16:21:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 680 transitions. [2020-10-15 16:21:19,963 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 680 transitions. Word has length 14 [2020-10-15 16:21:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:19,963 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 680 transitions. [2020-10-15 16:21:19,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 680 transitions. [2020-10-15 16:21:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:19,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:19,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:20,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 16:21:20,164 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash 971840412, now seen corresponding path program 218 times [2020-10-15 16:21:20,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:20,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342637643] [2020-10-15 16:21:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:20,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342637643] [2020-10-15 16:21:20,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109182343] [2020-10-15 16:21:20,343 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:20,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:21:20,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:20,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:20,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:20,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:20,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:20,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833715900] [2020-10-15 16:21:20,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:20,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:20,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:20,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:20,797 INFO L87 Difference]: Start difference. First operand 259 states and 680 transitions. Second operand 17 states. [2020-10-15 16:21:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:21,996 INFO L93 Difference]: Finished difference Result 357 states and 889 transitions. [2020-10-15 16:21:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:21:21,999 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:22,000 INFO L225 Difference]: With dead ends: 357 [2020-10-15 16:21:22,000 INFO L226 Difference]: Without dead ends: 353 [2020-10-15 16:21:22,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:21:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-15 16:21:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 261. [2020-10-15 16:21:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-15 16:21:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 687 transitions. [2020-10-15 16:21:22,004 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 687 transitions. Word has length 14 [2020-10-15 16:21:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:22,004 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 687 transitions. [2020-10-15 16:21:22,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:22,004 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 687 transitions. [2020-10-15 16:21:22,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:22,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:22,004 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:22,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 16:21:22,205 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:22,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 219 times [2020-10-15 16:21:22,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:22,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605550232] [2020-10-15 16:21:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:22,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605550232] [2020-10-15 16:21:22,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551129544] [2020-10-15 16:21:22,401 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:22,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:21:22,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:22,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:21:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:22,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:22,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:22,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007490132] [2020-10-15 16:21:22,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:22,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:22,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:22,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:22,820 INFO L87 Difference]: Start difference. First operand 261 states and 687 transitions. Second operand 17 states. [2020-10-15 16:21:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:24,655 INFO L93 Difference]: Finished difference Result 385 states and 962 transitions. [2020-10-15 16:21:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:21:24,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:24,658 INFO L225 Difference]: With dead ends: 385 [2020-10-15 16:21:24,658 INFO L226 Difference]: Without dead ends: 380 [2020-10-15 16:21:24,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:21:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-15 16:21:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 261. [2020-10-15 16:21:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-15 16:21:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 687 transitions. [2020-10-15 16:21:24,662 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 687 transitions. Word has length 14 [2020-10-15 16:21:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:24,663 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 687 transitions. [2020-10-15 16:21:24,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 687 transitions. [2020-10-15 16:21:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:24,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:24,663 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:24,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:24,864 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:24,865 INFO L82 PathProgramCache]: Analyzing trace with hash 971862732, now seen corresponding path program 220 times [2020-10-15 16:21:24,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:24,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561517881] [2020-10-15 16:21:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:25,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561517881] [2020-10-15 16:21:25,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934055390] [2020-10-15 16:21:25,052 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:25,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:21:25,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:25,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:21:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:25,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:25,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:25,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684356706] [2020-10-15 16:21:25,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:25,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:25,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:25,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:25,439 INFO L87 Difference]: Start difference. First operand 261 states and 687 transitions. Second operand 17 states. [2020-10-15 16:21:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:27,186 INFO L93 Difference]: Finished difference Result 385 states and 962 transitions. [2020-10-15 16:21:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:21:27,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:27,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:27,189 INFO L225 Difference]: With dead ends: 385 [2020-10-15 16:21:27,189 INFO L226 Difference]: Without dead ends: 379 [2020-10-15 16:21:27,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:21:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-15 16:21:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 257. [2020-10-15 16:21:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-15 16:21:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 674 transitions. [2020-10-15 16:21:27,194 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 674 transitions. Word has length 14 [2020-10-15 16:21:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:27,194 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 674 transitions. [2020-10-15 16:21:27,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 674 transitions. [2020-10-15 16:21:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:27,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:27,195 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:27,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:27,403 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:27,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:27,403 INFO L82 PathProgramCache]: Analyzing trace with hash 972071052, now seen corresponding path program 221 times [2020-10-15 16:21:27,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:27,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691293707] [2020-10-15 16:21:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:27,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691293707] [2020-10-15 16:21:27,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500246466] [2020-10-15 16:21:27,582 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:27,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:21:27,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:28,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:28,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:28,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540494466] [2020-10-15 16:21:28,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:28,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:28,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:28,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:28,094 INFO L87 Difference]: Start difference. First operand 257 states and 674 transitions. Second operand 17 states. [2020-10-15 16:21:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:29,773 INFO L93 Difference]: Finished difference Result 398 states and 973 transitions. [2020-10-15 16:21:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:21:29,776 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:29,777 INFO L225 Difference]: With dead ends: 398 [2020-10-15 16:21:29,777 INFO L226 Difference]: Without dead ends: 380 [2020-10-15 16:21:29,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:21:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-15 16:21:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 264. [2020-10-15 16:21:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-15 16:21:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 694 transitions. [2020-10-15 16:21:29,781 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 694 transitions. Word has length 14 [2020-10-15 16:21:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:29,781 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 694 transitions. [2020-10-15 16:21:29,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 694 transitions. [2020-10-15 16:21:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:29,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:29,782 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:29,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-15 16:21:29,982 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:29,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:29,983 INFO L82 PathProgramCache]: Analyzing trace with hash 972734142, now seen corresponding path program 222 times [2020-10-15 16:21:29,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:29,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314962540] [2020-10-15 16:21:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:30,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314962540] [2020-10-15 16:21:30,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464582087] [2020-10-15 16:21:30,174 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:30,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:21:30,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:30,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:30,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:30,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:30,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857112023] [2020-10-15 16:21:30,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:30,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:30,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:30,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:30,652 INFO L87 Difference]: Start difference. First operand 264 states and 694 transitions. Second operand 17 states. [2020-10-15 16:21:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:32,528 INFO L93 Difference]: Finished difference Result 380 states and 942 transitions. [2020-10-15 16:21:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:21:32,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:32,531 INFO L225 Difference]: With dead ends: 380 [2020-10-15 16:21:32,531 INFO L226 Difference]: Without dead ends: 375 [2020-10-15 16:21:32,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:21:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-15 16:21:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 268. [2020-10-15 16:21:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-15 16:21:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 708 transitions. [2020-10-15 16:21:32,535 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 708 transitions. Word has length 14 [2020-10-15 16:21:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:32,535 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 708 transitions. [2020-10-15 16:21:32,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 708 transitions. [2020-10-15 16:21:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:32,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:32,535 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:32,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:32,736 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 223 times [2020-10-15 16:21:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:32,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054554106] [2020-10-15 16:21:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:32,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054554106] [2020-10-15 16:21:32,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848279395] [2020-10-15 16:21:32,925 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:33,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:21:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:33,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:33,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:33,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013621663] [2020-10-15 16:21:33,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:33,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:33,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:33,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:33,380 INFO L87 Difference]: Start difference. First operand 268 states and 708 transitions. Second operand 17 states. [2020-10-15 16:21:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:35,839 INFO L93 Difference]: Finished difference Result 376 states and 942 transitions. [2020-10-15 16:21:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:21:35,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:35,842 INFO L225 Difference]: With dead ends: 376 [2020-10-15 16:21:35,842 INFO L226 Difference]: Without dead ends: 367 [2020-10-15 16:21:35,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:21:35,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-15 16:21:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 270. [2020-10-15 16:21:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-15 16:21:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 718 transitions. [2020-10-15 16:21:35,846 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 718 transitions. Word has length 14 [2020-10-15 16:21:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:35,847 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 718 transitions. [2020-10-15 16:21:35,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 718 transitions. [2020-10-15 16:21:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:35,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:35,847 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:36,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-15 16:21:36,048 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:36,049 INFO L82 PathProgramCache]: Analyzing trace with hash 972756462, now seen corresponding path program 224 times [2020-10-15 16:21:36,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:36,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779631440] [2020-10-15 16:21:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:36,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779631440] [2020-10-15 16:21:36,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355769645] [2020-10-15 16:21:36,243 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:36,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:21:36,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:36,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:36,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:40,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:21:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:40,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:40,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:40,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189809273] [2020-10-15 16:21:40,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:40,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:40,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:40,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-15 16:21:40,855 INFO L87 Difference]: Start difference. First operand 270 states and 718 transitions. Second operand 17 states. [2020-10-15 16:21:45,856 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-15 16:21:50,055 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 16:21:54,395 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-15 16:21:58,747 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-15 16:22:00,864 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 16:22:05,625 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-15 16:22:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:06,676 INFO L93 Difference]: Finished difference Result 424 states and 1059 transitions. [2020-10-15 16:22:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:22:06,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:06,680 INFO L225 Difference]: With dead ends: 424 [2020-10-15 16:22:06,680 INFO L226 Difference]: Without dead ends: 414 [2020-10-15 16:22:06,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-15 16:22:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-15 16:22:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 264. [2020-10-15 16:22:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-15 16:22:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 700 transitions. [2020-10-15 16:22:06,684 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 700 transitions. Word has length 14 [2020-10-15 16:22:06,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:06,684 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 700 transitions. [2020-10-15 16:22:06,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:06,684 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 700 transitions. [2020-10-15 16:22:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:06,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:06,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:06,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:06,886 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:06,886 INFO L82 PathProgramCache]: Analyzing trace with hash 972785292, now seen corresponding path program 225 times [2020-10-15 16:22:06,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:06,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743684268] [2020-10-15 16:22:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:07,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743684268] [2020-10-15 16:22:07,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459214185] [2020-10-15 16:22:07,090 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:07,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:22:07,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:07,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:07,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:07,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:07,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:07,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321137165] [2020-10-15 16:22:07,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:07,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:07,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:07,507 INFO L87 Difference]: Start difference. First operand 264 states and 700 transitions. Second operand 17 states. [2020-10-15 16:22:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:10,226 INFO L93 Difference]: Finished difference Result 424 states and 1057 transitions. [2020-10-15 16:22:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:22:10,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:10,230 INFO L225 Difference]: With dead ends: 424 [2020-10-15 16:22:10,230 INFO L226 Difference]: Without dead ends: 414 [2020-10-15 16:22:10,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:22:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-15 16:22:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 263. [2020-10-15 16:22:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-15 16:22:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 696 transitions. [2020-10-15 16:22:10,235 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 696 transitions. Word has length 14 [2020-10-15 16:22:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:10,235 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 696 transitions. [2020-10-15 16:22:10,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 696 transitions. [2020-10-15 16:22:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:10,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:10,236 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:10,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:10,436 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:10,437 INFO L82 PathProgramCache]: Analyzing trace with hash 979221853, now seen corresponding path program 226 times [2020-10-15 16:22:10,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:10,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890649236] [2020-10-15 16:22:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:10,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890649236] [2020-10-15 16:22:10,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803452853] [2020-10-15 16:22:10,620 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:10,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:22:10,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:10,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:10,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:10,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:10,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:10,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078855319] [2020-10-15 16:22:10,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:10,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:10,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:10,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:10,989 INFO L87 Difference]: Start difference. First operand 263 states and 696 transitions. Second operand 17 states. [2020-10-15 16:22:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:11,962 INFO L93 Difference]: Finished difference Result 374 states and 921 transitions. [2020-10-15 16:22:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:22:11,965 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:11,966 INFO L225 Difference]: With dead ends: 374 [2020-10-15 16:22:11,966 INFO L226 Difference]: Without dead ends: 360 [2020-10-15 16:22:11,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:22:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-15 16:22:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 263. [2020-10-15 16:22:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-15 16:22:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 696 transitions. [2020-10-15 16:22:11,970 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 696 transitions. Word has length 14 [2020-10-15 16:22:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:11,971 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 696 transitions. [2020-10-15 16:22:11,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 696 transitions. [2020-10-15 16:22:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:11,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:11,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:12,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:12,176 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:12,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash 999776682, now seen corresponding path program 227 times [2020-10-15 16:22:12,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:12,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303692136] [2020-10-15 16:22:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:12,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303692136] [2020-10-15 16:22:12,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438716016] [2020-10-15 16:22:12,369 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:12,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:22:12,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:12,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:12,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:12,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:12,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:12,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657593984] [2020-10-15 16:22:12,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:12,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:12,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:12,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:12,767 INFO L87 Difference]: Start difference. First operand 263 states and 696 transitions. Second operand 17 states. [2020-10-15 16:22:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:14,269 INFO L93 Difference]: Finished difference Result 399 states and 977 transitions. [2020-10-15 16:22:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:22:14,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:14,274 INFO L225 Difference]: With dead ends: 399 [2020-10-15 16:22:14,274 INFO L226 Difference]: Without dead ends: 394 [2020-10-15 16:22:14,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:22:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-15 16:22:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 256. [2020-10-15 16:22:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-15 16:22:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 681 transitions. [2020-10-15 16:22:14,279 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 681 transitions. Word has length 14 [2020-10-15 16:22:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:14,280 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 681 transitions. [2020-10-15 16:22:14,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 681 transitions. [2020-10-15 16:22:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:14,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:14,281 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:14,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 16:22:14,484 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash 999777643, now seen corresponding path program 228 times [2020-10-15 16:22:14,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:14,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836279450] [2020-10-15 16:22:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:14,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836279450] [2020-10-15 16:22:14,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524476636] [2020-10-15 16:22:14,687 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:14,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:22:14,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:14,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:14,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:15,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:15,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:15,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863840052] [2020-10-15 16:22:15,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:15,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:15,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:15,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:15,041 INFO L87 Difference]: Start difference. First operand 256 states and 681 transitions. Second operand 17 states. [2020-10-15 16:22:16,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:16,283 INFO L93 Difference]: Finished difference Result 396 states and 966 transitions. [2020-10-15 16:22:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:22:16,285 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:16,286 INFO L225 Difference]: With dead ends: 396 [2020-10-15 16:22:16,286 INFO L226 Difference]: Without dead ends: 382 [2020-10-15 16:22:16,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:22:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-15 16:22:16,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 254. [2020-10-15 16:22:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-15 16:22:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 675 transitions. [2020-10-15 16:22:16,291 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 675 transitions. Word has length 14 [2020-10-15 16:22:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:16,291 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 675 transitions. [2020-10-15 16:22:16,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 675 transitions. [2020-10-15 16:22:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:16,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:16,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:16,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 16:22:16,493 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1000439772, now seen corresponding path program 229 times [2020-10-15 16:22:16,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:16,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894327724] [2020-10-15 16:22:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:16,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894327724] [2020-10-15 16:22:16,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58218687] [2020-10-15 16:22:16,694 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:16,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:16,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:17,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:17,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:17,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001923032] [2020-10-15 16:22:17,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:17,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:17,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:17,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:17,069 INFO L87 Difference]: Start difference. First operand 254 states and 675 transitions. Second operand 17 states. [2020-10-15 16:22:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:18,680 INFO L93 Difference]: Finished difference Result 380 states and 942 transitions. [2020-10-15 16:22:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:22:18,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:18,683 INFO L225 Difference]: With dead ends: 380 [2020-10-15 16:22:18,683 INFO L226 Difference]: Without dead ends: 375 [2020-10-15 16:22:18,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:22:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-15 16:22:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 256. [2020-10-15 16:22:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-15 16:22:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 681 transitions. [2020-10-15 16:22:18,688 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 681 transitions. Word has length 14 [2020-10-15 16:22:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:18,688 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 681 transitions. [2020-10-15 16:22:18,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 681 transitions. [2020-10-15 16:22:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:18,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:18,688 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:18,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-15 16:22:18,889 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:18,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:18,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 230 times [2020-10-15 16:22:18,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:18,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848141483] [2020-10-15 16:22:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:19,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848141483] [2020-10-15 16:22:19,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96709564] [2020-10-15 16:22:19,094 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:19,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:22:19,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:19,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:19,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:19,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:19,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:19,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:19,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703878170] [2020-10-15 16:22:19,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:19,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:19,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:19,415 INFO L87 Difference]: Start difference. First operand 256 states and 681 transitions. Second operand 17 states. [2020-10-15 16:22:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:20,931 INFO L93 Difference]: Finished difference Result 352 states and 887 transitions. [2020-10-15 16:22:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:22:20,934 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:20,934 INFO L225 Difference]: With dead ends: 352 [2020-10-15 16:22:20,935 INFO L226 Difference]: Without dead ends: 342 [2020-10-15 16:22:20,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:22:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-15 16:22:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 253. [2020-10-15 16:22:20,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-15 16:22:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 667 transitions. [2020-10-15 16:22:20,938 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 667 transitions. Word has length 14 [2020-10-15 16:22:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:20,939 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 667 transitions. [2020-10-15 16:22:20,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 667 transitions. [2020-10-15 16:22:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:20,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:20,939 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:21,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-15 16:22:21,141 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:21,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1000462092, now seen corresponding path program 231 times [2020-10-15 16:22:21,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:21,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509298583] [2020-10-15 16:22:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:21,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509298583] [2020-10-15 16:22:21,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539683681] [2020-10-15 16:22:21,355 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:21,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:22:21,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:21,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:21,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:22:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:21,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:21,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:21,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884977943] [2020-10-15 16:22:21,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:21,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:21,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:21,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:21,798 INFO L87 Difference]: Start difference. First operand 253 states and 667 transitions. Second operand 17 states. [2020-10-15 16:22:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:23,816 INFO L93 Difference]: Finished difference Result 421 states and 1043 transitions. [2020-10-15 16:22:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:22:23,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:23,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:23,820 INFO L225 Difference]: With dead ends: 421 [2020-10-15 16:22:23,820 INFO L226 Difference]: Without dead ends: 410 [2020-10-15 16:22:23,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:22:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-15 16:22:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 249. [2020-10-15 16:22:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-15 16:22:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 653 transitions. [2020-10-15 16:22:23,824 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 653 transitions. Word has length 14 [2020-10-15 16:22:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:23,824 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 653 transitions. [2020-10-15 16:22:23,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 653 transitions. [2020-10-15 16:22:23,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:23,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:23,824 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:24,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-10-15 16:22:24,025 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:24,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:24,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1000469563, now seen corresponding path program 232 times [2020-10-15 16:22:24,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:24,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864364644] [2020-10-15 16:22:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:24,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864364644] [2020-10-15 16:22:24,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756112462] [2020-10-15 16:22:24,225 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:24,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:22:24,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:24,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:24,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:24,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:24,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069259447] [2020-10-15 16:22:24,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:24,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:24,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:24,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:24,589 INFO L87 Difference]: Start difference. First operand 249 states and 653 transitions. Second operand 17 states. [2020-10-15 16:22:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:26,061 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2020-10-15 16:22:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:22:26,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:26,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:26,064 INFO L225 Difference]: With dead ends: 402 [2020-10-15 16:22:26,065 INFO L226 Difference]: Without dead ends: 389 [2020-10-15 16:22:26,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:22:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-15 16:22:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 251. [2020-10-15 16:22:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-15 16:22:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2020-10-15 16:22:26,069 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 14 [2020-10-15 16:22:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:26,069 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2020-10-15 16:22:26,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2020-10-15 16:22:26,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:26,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:26,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:26,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:26,270 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:26,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:26,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1000490922, now seen corresponding path program 233 times [2020-10-15 16:22:26,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:26,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118105080] [2020-10-15 16:22:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:26,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118105080] [2020-10-15 16:22:26,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927904147] [2020-10-15 16:22:26,476 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:26,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:22:26,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:26,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:26,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:26,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:26,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:26,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:26,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337328385] [2020-10-15 16:22:26,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:26,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:26,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:26,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:26,829 INFO L87 Difference]: Start difference. First operand 251 states and 658 transitions. Second operand 17 states. [2020-10-15 16:22:28,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:28,547 INFO L93 Difference]: Finished difference Result 422 states and 1042 transitions. [2020-10-15 16:22:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:22:28,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:28,550 INFO L225 Difference]: With dead ends: 422 [2020-10-15 16:22:28,551 INFO L226 Difference]: Without dead ends: 411 [2020-10-15 16:22:28,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:22:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-15 16:22:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 249. [2020-10-15 16:22:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-15 16:22:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 648 transitions. [2020-10-15 16:22:28,555 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 648 transitions. Word has length 14 [2020-10-15 16:22:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:28,555 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 648 transitions. [2020-10-15 16:22:28,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 648 transitions. [2020-10-15 16:22:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:28,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:28,555 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:28,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:28,756 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1000491883, now seen corresponding path program 234 times [2020-10-15 16:22:28,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:28,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011839698] [2020-10-15 16:22:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:28,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011839698] [2020-10-15 16:22:28,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613916325] [2020-10-15 16:22:28,966 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:29,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:22:29,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:29,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:29,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:22:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:29,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:29,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:29,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002708802] [2020-10-15 16:22:29,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:29,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:29,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:29,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:29,404 INFO L87 Difference]: Start difference. First operand 249 states and 648 transitions. Second operand 17 states. [2020-10-15 16:22:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:31,388 INFO L93 Difference]: Finished difference Result 424 states and 1036 transitions. [2020-10-15 16:22:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:22:31,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:31,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:31,392 INFO L225 Difference]: With dead ends: 424 [2020-10-15 16:22:31,392 INFO L226 Difference]: Without dead ends: 396 [2020-10-15 16:22:31,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:22:31,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-15 16:22:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 238. [2020-10-15 16:22:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-15 16:22:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 612 transitions. [2020-10-15 16:22:31,397 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 612 transitions. Word has length 14 [2020-10-15 16:22:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:31,397 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 612 transitions. [2020-10-15 16:22:31,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 612 transitions. [2020-10-15 16:22:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:31,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:31,397 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:31,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:31,598 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:31,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1001384652, now seen corresponding path program 235 times [2020-10-15 16:22:31,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:31,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835061049] [2020-10-15 16:22:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:31,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835061049] [2020-10-15 16:22:31,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080786722] [2020-10-15 16:22:31,804 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:31,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:31,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:32,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:32,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:32,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:32,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574562752] [2020-10-15 16:22:32,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:32,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:32,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:32,197 INFO L87 Difference]: Start difference. First operand 238 states and 612 transitions. Second operand 17 states. [2020-10-15 16:22:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:34,484 INFO L93 Difference]: Finished difference Result 369 states and 896 transitions. [2020-10-15 16:22:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:22:34,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:34,488 INFO L225 Difference]: With dead ends: 369 [2020-10-15 16:22:34,488 INFO L226 Difference]: Without dead ends: 359 [2020-10-15 16:22:34,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:22:34,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-15 16:22:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 228. [2020-10-15 16:22:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-15 16:22:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 568 transitions. [2020-10-15 16:22:34,492 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 568 transitions. Word has length 14 [2020-10-15 16:22:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:34,492 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 568 transitions. [2020-10-15 16:22:34,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 568 transitions. [2020-10-15 16:22:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:34,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:34,492 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:34,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-10-15 16:22:34,696 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1866754364, now seen corresponding path program 236 times [2020-10-15 16:22:34,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:34,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855527677] [2020-10-15 16:22:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:34,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855527677] [2020-10-15 16:22:34,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623541749] [2020-10-15 16:22:34,924 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:34,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:22:34,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:34,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:34,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:35,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:35,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:35,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40201422] [2020-10-15 16:22:35,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:35,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:35,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:35,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:35,332 INFO L87 Difference]: Start difference. First operand 228 states and 568 transitions. Second operand 17 states. [2020-10-15 16:22:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:35,939 INFO L93 Difference]: Finished difference Result 304 states and 714 transitions. [2020-10-15 16:22:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:22:35,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:35,942 INFO L225 Difference]: With dead ends: 304 [2020-10-15 16:22:35,943 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 16:22:35,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:22:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 16:22:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 226. [2020-10-15 16:22:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-15 16:22:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 564 transitions. [2020-10-15 16:22:35,946 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 564 transitions. Word has length 14 [2020-10-15 16:22:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:35,946 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 564 transitions. [2020-10-15 16:22:35,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 564 transitions. [2020-10-15 16:22:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:35,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:35,947 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:36,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:36,148 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1888203884, now seen corresponding path program 237 times [2020-10-15 16:22:36,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:36,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626388302] [2020-10-15 16:22:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:36,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626388302] [2020-10-15 16:22:36,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681257009] [2020-10-15 16:22:36,361 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:36,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:22:36,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:36,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:36,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:36,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:36,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481388933] [2020-10-15 16:22:36,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:36,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:36,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:36,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:36,774 INFO L87 Difference]: Start difference. First operand 226 states and 564 transitions. Second operand 17 states. [2020-10-15 16:22:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:37,443 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2020-10-15 16:22:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:22:37,445 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:37,446 INFO L225 Difference]: With dead ends: 300 [2020-10-15 16:22:37,446 INFO L226 Difference]: Without dead ends: 287 [2020-10-15 16:22:37,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:22:37,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-15 16:22:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 224. [2020-10-15 16:22:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-15 16:22:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 562 transitions. [2020-10-15 16:22:37,449 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 562 transitions. Word has length 14 [2020-10-15 16:22:37,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:37,449 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 562 transitions. [2020-10-15 16:22:37,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:37,449 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 562 transitions. [2020-10-15 16:22:37,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:37,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:37,449 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:37,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-10-15 16:22:37,651 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:37,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1888866974, now seen corresponding path program 238 times [2020-10-15 16:22:37,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:37,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234657706] [2020-10-15 16:22:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:37,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234657706] [2020-10-15 16:22:37,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060639673] [2020-10-15 16:22:37,846 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:37,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:22:37,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:38,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:38,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:38,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984494497] [2020-10-15 16:22:38,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:38,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:38,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:38,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:38,301 INFO L87 Difference]: Start difference. First operand 224 states and 562 transitions. Second operand 17 states. [2020-10-15 16:22:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:39,098 INFO L93 Difference]: Finished difference Result 294 states and 701 transitions. [2020-10-15 16:22:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:22:39,101 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:39,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:39,101 INFO L225 Difference]: With dead ends: 294 [2020-10-15 16:22:39,101 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 16:22:39,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:22:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 16:22:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 224. [2020-10-15 16:22:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-15 16:22:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 560 transitions. [2020-10-15 16:22:39,105 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 560 transitions. Word has length 14 [2020-10-15 16:22:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:39,105 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 560 transitions. [2020-10-15 16:22:39,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 560 transitions. [2020-10-15 16:22:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:39,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:39,106 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:39,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:39,307 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:39,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1888889294, now seen corresponding path program 239 times [2020-10-15 16:22:39,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:39,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118265209] [2020-10-15 16:22:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:39,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118265209] [2020-10-15 16:22:39,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026957854] [2020-10-15 16:22:39,515 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:39,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:22:39,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:39,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:39,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:39,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:22:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:41,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:41,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:22:41,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454680599] [2020-10-15 16:22:41,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:22:41,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:41,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:22:41,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-15 16:22:41,383 INFO L87 Difference]: Start difference. First operand 224 states and 560 transitions. Second operand 18 states. [2020-10-15 16:22:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:44,828 INFO L93 Difference]: Finished difference Result 303 states and 720 transitions. [2020-10-15 16:22:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:22:44,830 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:22:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:44,831 INFO L225 Difference]: With dead ends: 303 [2020-10-15 16:22:44,831 INFO L226 Difference]: Without dead ends: 286 [2020-10-15 16:22:44,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=307, Invalid=622, Unknown=1, NotChecked=0, Total=930 [2020-10-15 16:22:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-15 16:22:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 222. [2020-10-15 16:22:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-15 16:22:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 554 transitions. [2020-10-15 16:22:44,835 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 554 transitions. Word has length 14 [2020-10-15 16:22:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:44,835 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 554 transitions. [2020-10-15 16:22:44,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:22:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 554 transitions. [2020-10-15 16:22:44,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:44,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:44,836 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:45,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-15 16:22:45,036 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:45,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1888918124, now seen corresponding path program 240 times [2020-10-15 16:22:45,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:45,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712330279] [2020-10-15 16:22:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:45,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712330279] [2020-10-15 16:22:45,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70579370] [2020-10-15 16:22:45,238 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:45,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:22:45,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:45,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:45,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:45,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:45,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:45,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728728658] [2020-10-15 16:22:45,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:45,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:45,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:45,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:45,656 INFO L87 Difference]: Start difference. First operand 222 states and 554 transitions. Second operand 17 states. [2020-10-15 16:22:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:46,566 INFO L93 Difference]: Finished difference Result 287 states and 679 transitions. [2020-10-15 16:22:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:22:46,568 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:46,569 INFO L225 Difference]: With dead ends: 287 [2020-10-15 16:22:46,569 INFO L226 Difference]: Without dead ends: 271 [2020-10-15 16:22:46,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:22:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-15 16:22:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 216. [2020-10-15 16:22:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-15 16:22:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 535 transitions. [2020-10-15 16:22:46,572 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 535 transitions. Word has length 14 [2020-10-15 16:22:46,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:46,572 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 535 transitions. [2020-10-15 16:22:46,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 535 transitions. [2020-10-15 16:22:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:22:46,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:46,573 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:46,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:46,774 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash 491278210, now seen corresponding path program 241 times [2020-10-15 16:22:46,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:46,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044884678] [2020-10-15 16:22:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:47,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044884678] [2020-10-15 16:22:47,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757588509] [2020-10-15 16:22:47,050 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:47,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:22:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:47,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:47,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:22:47,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898760554] [2020-10-15 16:22:47,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:22:47,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:47,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:22:47,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:22:47,554 INFO L87 Difference]: Start difference. First operand 216 states and 535 transitions. Second operand 19 states. [2020-10-15 16:22:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:48,077 INFO L93 Difference]: Finished difference Result 268 states and 633 transitions. [2020-10-15 16:22:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:22:48,079 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:22:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:48,080 INFO L225 Difference]: With dead ends: 268 [2020-10-15 16:22:48,080 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 16:22:48,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:22:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 16:22:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 227. [2020-10-15 16:22:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-15 16:22:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 563 transitions. [2020-10-15 16:22:48,084 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 563 transitions. Word has length 15 [2020-10-15 16:22:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:48,084 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 563 transitions. [2020-10-15 16:22:48,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:22:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 563 transitions. [2020-10-15 16:22:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:22:48,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:48,084 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:48,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-15 16:22:48,285 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:48,286 INFO L82 PathProgramCache]: Analyzing trace with hash 491307040, now seen corresponding path program 242 times [2020-10-15 16:22:48,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:48,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810702141] [2020-10-15 16:22:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:48,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810702141] [2020-10-15 16:22:48,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346515700] [2020-10-15 16:22:48,555 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:48,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:22:48,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:22:48,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:50,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:50,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:22:50,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752944753] [2020-10-15 16:22:50,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:22:50,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:50,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:22:50,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:22:50,686 INFO L87 Difference]: Start difference. First operand 227 states and 563 transitions. Second operand 19 states. [2020-10-15 16:22:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:51,447 INFO L93 Difference]: Finished difference Result 295 states and 691 transitions. [2020-10-15 16:22:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:22:51,450 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:22:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:51,450 INFO L225 Difference]: With dead ends: 295 [2020-10-15 16:22:51,450 INFO L226 Difference]: Without dead ends: 292 [2020-10-15 16:22:51,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:22:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-15 16:22:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 229. [2020-10-15 16:22:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-15 16:22:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 569 transitions. [2020-10-15 16:22:51,453 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 569 transitions. Word has length 15 [2020-10-15 16:22:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:51,453 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 569 transitions. [2020-10-15 16:22:51,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:22:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 569 transitions. [2020-10-15 16:22:51,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:22:51,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:51,454 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:51,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-10-15 16:22:51,655 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:51,655 INFO L82 PathProgramCache]: Analyzing trace with hash 492200770, now seen corresponding path program 243 times [2020-10-15 16:22:51,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:51,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415112000] [2020-10-15 16:22:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:51,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415112000] [2020-10-15 16:22:51,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904174845] [2020-10-15 16:22:51,931 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:51,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:22:51,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:51,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:22:51,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:00,525 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 16:23:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:00,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:00,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-10-15 16:23:00,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694818005] [2020-10-15 16:23:00,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:23:00,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:23:00,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=253, Unknown=3, NotChecked=0, Total=380 [2020-10-15 16:23:00,529 INFO L87 Difference]: Start difference. First operand 229 states and 569 transitions. Second operand 20 states. [2020-10-15 16:23:02,501 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 16:23:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:15,082 INFO L93 Difference]: Finished difference Result 303 states and 705 transitions. [2020-10-15 16:23:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:23:15,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-10-15 16:23:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:15,086 INFO L225 Difference]: With dead ends: 303 [2020-10-15 16:23:15,086 INFO L226 Difference]: Without dead ends: 301 [2020-10-15 16:23:15,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=266, Invalid=487, Unknown=3, NotChecked=0, Total=756 [2020-10-15 16:23:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-15 16:23:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 231. [2020-10-15 16:23:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-15 16:23:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 575 transitions. [2020-10-15 16:23:15,089 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 575 transitions. Word has length 15 [2020-10-15 16:23:15,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:15,090 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 575 transitions. [2020-10-15 16:23:15,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:23:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 575 transitions. [2020-10-15 16:23:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:15,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:15,090 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:15,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:15,291 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash 492201731, now seen corresponding path program 244 times [2020-10-15 16:23:15,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:15,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390490609] [2020-10-15 16:23:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:15,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390490609] [2020-10-15 16:23:15,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855424962] [2020-10-15 16:23:15,564 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:15,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:15,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:15,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:19,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:19,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:23:19,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567393902] [2020-10-15 16:23:19,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:23:19,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:19,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:23:19,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-10-15 16:23:19,826 INFO L87 Difference]: Start difference. First operand 231 states and 575 transitions. Second operand 19 states. [2020-10-15 16:23:24,208 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 16:23:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:24,913 INFO L93 Difference]: Finished difference Result 320 states and 746 transitions. [2020-10-15 16:23:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:23:24,916 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:23:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:24,917 INFO L225 Difference]: With dead ends: 320 [2020-10-15 16:23:24,917 INFO L226 Difference]: Without dead ends: 316 [2020-10-15 16:23:24,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:23:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-15 16:23:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 232. [2020-10-15 16:23:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-15 16:23:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 578 transitions. [2020-10-15 16:23:24,921 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 578 transitions. Word has length 15 [2020-10-15 16:23:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:24,921 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 578 transitions. [2020-10-15 16:23:24,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:23:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 578 transitions. [2020-10-15 16:23:24,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:24,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:24,921 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:25,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:25,122 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:25,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash 492230561, now seen corresponding path program 245 times [2020-10-15 16:23:25,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:25,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786971701] [2020-10-15 16:23:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:25,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786971701] [2020-10-15 16:23:25,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494055980] [2020-10-15 16:23:25,398 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:25,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:23:25,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:25,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:25,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:26,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:26,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:23:26,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583930472] [2020-10-15 16:23:26,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:23:26,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:23:26,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:23:26,017 INFO L87 Difference]: Start difference. First operand 232 states and 578 transitions. Second operand 19 states. [2020-10-15 16:23:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:26,897 INFO L93 Difference]: Finished difference Result 311 states and 727 transitions. [2020-10-15 16:23:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:23:26,900 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:23:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:26,901 INFO L225 Difference]: With dead ends: 311 [2020-10-15 16:23:26,901 INFO L226 Difference]: Without dead ends: 308 [2020-10-15 16:23:26,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:23:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-15 16:23:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 232. [2020-10-15 16:23:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-15 16:23:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 578 transitions. [2020-10-15 16:23:26,905 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 578 transitions. Word has length 15 [2020-10-15 16:23:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:26,905 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 578 transitions. [2020-10-15 16:23:26,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:23:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 578 transitions. [2020-10-15 16:23:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:26,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:26,905 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:27,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:27,106 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:27,107 INFO L82 PathProgramCache]: Analyzing trace with hash 519906400, now seen corresponding path program 246 times [2020-10-15 16:23:27,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:27,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015631458] [2020-10-15 16:23:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:27,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015631458] [2020-10-15 16:23:27,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767294162] [2020-10-15 16:23:27,383 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:27,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:23:27,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:27,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:28,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:28,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:23:28,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072829800] [2020-10-15 16:23:28,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:23:28,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:23:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:23:28,009 INFO L87 Difference]: Start difference. First operand 232 states and 578 transitions. Second operand 19 states. [2020-10-15 16:23:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:29,243 INFO L93 Difference]: Finished difference Result 299 states and 700 transitions. [2020-10-15 16:23:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:23:29,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:23:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:29,247 INFO L225 Difference]: With dead ends: 299 [2020-10-15 16:23:29,247 INFO L226 Difference]: Without dead ends: 297 [2020-10-15 16:23:29,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:23:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-15 16:23:29,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 235. [2020-10-15 16:23:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-15 16:23:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 587 transitions. [2020-10-15 16:23:29,251 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 587 transitions. Word has length 15 [2020-10-15 16:23:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:29,251 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 587 transitions. [2020-10-15 16:23:29,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:23:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 587 transitions. [2020-10-15 16:23:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:29,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:29,252 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:29,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:29,455 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:29,456 INFO L82 PathProgramCache]: Analyzing trace with hash 519907361, now seen corresponding path program 247 times [2020-10-15 16:23:29,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:29,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83557647] [2020-10-15 16:23:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:29,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83557647] [2020-10-15 16:23:29,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996951350] [2020-10-15 16:23:29,744 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:29,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:29,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:32,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:32,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:23:32,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330064173] [2020-10-15 16:23:32,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:23:32,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:32,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:23:32,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=238, Unknown=1, NotChecked=0, Total=342 [2020-10-15 16:23:32,404 INFO L87 Difference]: Start difference. First operand 235 states and 587 transitions. Second operand 19 states. [2020-10-15 16:23:32,786 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 20 [2020-10-15 16:23:33,488 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-15 16:23:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:33,829 INFO L93 Difference]: Finished difference Result 325 states and 758 transitions. [2020-10-15 16:23:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:23:33,832 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:23:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:33,833 INFO L225 Difference]: With dead ends: 325 [2020-10-15 16:23:33,833 INFO L226 Difference]: Without dead ends: 321 [2020-10-15 16:23:33,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=248, Invalid=507, Unknown=1, NotChecked=0, Total=756 [2020-10-15 16:23:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-15 16:23:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 235. [2020-10-15 16:23:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-15 16:23:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 587 transitions. [2020-10-15 16:23:33,836 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 587 transitions. Word has length 15 [2020-10-15 16:23:33,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:33,836 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 587 transitions. [2020-10-15 16:23:33,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:23:33,837 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 587 transitions. [2020-10-15 16:23:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:33,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:33,837 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:34,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-10-15 16:23:34,040 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:34,041 INFO L82 PathProgramCache]: Analyzing trace with hash 519936191, now seen corresponding path program 248 times [2020-10-15 16:23:34,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:34,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182354086] [2020-10-15 16:23:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:34,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182354086] [2020-10-15 16:23:34,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166100247] [2020-10-15 16:23:34,321 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:34,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:34,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:34,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:34,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:48,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:48,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:23:48,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430093515] [2020-10-15 16:23:48,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:23:48,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:48,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:23:48,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=233, Unknown=4, NotChecked=0, Total=342 [2020-10-15 16:23:48,969 INFO L87 Difference]: Start difference. First operand 235 states and 587 transitions. Second operand 19 states. [2020-10-15 16:23:53,366 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:24:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:05,072 INFO L93 Difference]: Finished difference Result 337 states and 786 transitions. [2020-10-15 16:24:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:24:05,075 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:05,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:05,076 INFO L225 Difference]: With dead ends: 337 [2020-10-15 16:24:05,076 INFO L226 Difference]: Without dead ends: 333 [2020-10-15 16:24:05,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=253, Invalid=499, Unknown=4, NotChecked=0, Total=756 [2020-10-15 16:24:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-15 16:24:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 236. [2020-10-15 16:24:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-15 16:24:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 590 transitions. [2020-10-15 16:24:05,080 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 590 transitions. Word has length 15 [2020-10-15 16:24:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:05,080 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 590 transitions. [2020-10-15 16:24:05,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 590 transitions. [2020-10-15 16:24:05,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:05,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:05,081 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:05,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:05,292 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash 520830882, now seen corresponding path program 249 times [2020-10-15 16:24:05,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:05,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919859887] [2020-10-15 16:24:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:05,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919859887] [2020-10-15 16:24:05,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892488002] [2020-10-15 16:24:05,576 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:05,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:05,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:05,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:05,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:07,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:07,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:07,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598314718] [2020-10-15 16:24:07,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:07,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:07,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:07,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:07,256 INFO L87 Difference]: Start difference. First operand 236 states and 590 transitions. Second operand 19 states. [2020-10-15 16:24:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:08,409 INFO L93 Difference]: Finished difference Result 335 states and 781 transitions. [2020-10-15 16:24:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:24:08,412 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:08,413 INFO L225 Difference]: With dead ends: 335 [2020-10-15 16:24:08,413 INFO L226 Difference]: Without dead ends: 319 [2020-10-15 16:24:08,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:24:08,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-15 16:24:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 236. [2020-10-15 16:24:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-15 16:24:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 583 transitions. [2020-10-15 16:24:08,420 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 583 transitions. Word has length 15 [2020-10-15 16:24:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:08,420 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 583 transitions. [2020-10-15 16:24:08,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 583 transitions. [2020-10-15 16:24:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:08,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:08,421 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:08,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-15 16:24:08,622 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1378780930, now seen corresponding path program 250 times [2020-10-15 16:24:08,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:08,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151420988] [2020-10-15 16:24:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:08,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151420988] [2020-10-15 16:24:08,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748559814] [2020-10-15 16:24:08,894 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:08,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:08,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:09,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:09,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:09,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601305926] [2020-10-15 16:24:09,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:09,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:09,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:09,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:09,432 INFO L87 Difference]: Start difference. First operand 236 states and 583 transitions. Second operand 19 states. [2020-10-15 16:24:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:10,459 INFO L93 Difference]: Finished difference Result 297 states and 694 transitions. [2020-10-15 16:24:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:24:10,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:10,463 INFO L225 Difference]: With dead ends: 297 [2020-10-15 16:24:10,463 INFO L226 Difference]: Without dead ends: 295 [2020-10-15 16:24:10,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:24:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-15 16:24:10,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 240. [2020-10-15 16:24:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-15 16:24:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 594 transitions. [2020-10-15 16:24:10,467 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 594 transitions. Word has length 15 [2020-10-15 16:24:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:10,467 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 594 transitions. [2020-10-15 16:24:10,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 594 transitions. [2020-10-15 16:24:10,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:10,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:10,468 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:10,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:10,668 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:10,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1378781891, now seen corresponding path program 251 times [2020-10-15 16:24:10,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:10,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540754999] [2020-10-15 16:24:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:10,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540754999] [2020-10-15 16:24:10,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755654938] [2020-10-15 16:24:10,949 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:10,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:24:10,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:10,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:10,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:11,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:11,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:11,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58186751] [2020-10-15 16:24:11,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:11,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:11,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:11,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:11,490 INFO L87 Difference]: Start difference. First operand 240 states and 594 transitions. Second operand 19 states. [2020-10-15 16:24:12,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:12,533 INFO L93 Difference]: Finished difference Result 321 states and 746 transitions. [2020-10-15 16:24:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:24:12,536 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:12,537 INFO L225 Difference]: With dead ends: 321 [2020-10-15 16:24:12,537 INFO L226 Difference]: Without dead ends: 318 [2020-10-15 16:24:12,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:24:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-15 16:24:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 239. [2020-10-15 16:24:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-15 16:24:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 591 transitions. [2020-10-15 16:24:12,540 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 591 transitions. Word has length 15 [2020-10-15 16:24:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:12,541 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 591 transitions. [2020-10-15 16:24:12,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 591 transitions. [2020-10-15 16:24:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:12,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:12,541 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:12,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-15 16:24:12,742 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:12,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:12,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1378810721, now seen corresponding path program 252 times [2020-10-15 16:24:12,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:12,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481559163] [2020-10-15 16:24:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:13,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481559163] [2020-10-15 16:24:13,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508965424] [2020-10-15 16:24:13,053 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:13,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:24:13,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:13,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:13,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:13,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:13,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336883928] [2020-10-15 16:24:13,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:13,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:13,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:13,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:13,861 INFO L87 Difference]: Start difference. First operand 239 states and 591 transitions. Second operand 19 states. [2020-10-15 16:24:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:14,973 INFO L93 Difference]: Finished difference Result 332 states and 772 transitions. [2020-10-15 16:24:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:24:14,976 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:14,977 INFO L225 Difference]: With dead ends: 332 [2020-10-15 16:24:14,977 INFO L226 Difference]: Without dead ends: 328 [2020-10-15 16:24:14,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:24:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-15 16:24:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 238. [2020-10-15 16:24:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-15 16:24:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 588 transitions. [2020-10-15 16:24:14,980 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 588 transitions. Word has length 15 [2020-10-15 16:24:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:14,980 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 588 transitions. [2020-10-15 16:24:14,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 588 transitions. [2020-10-15 16:24:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:14,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:14,980 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:15,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:15,181 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:15,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1379704451, now seen corresponding path program 253 times [2020-10-15 16:24:15,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:15,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26757198] [2020-10-15 16:24:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:15,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26757198] [2020-10-15 16:24:15,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809956114] [2020-10-15 16:24:15,465 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:15,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:15,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:15,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:15,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:15,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14376811] [2020-10-15 16:24:15,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:15,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:15,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:15,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:15,978 INFO L87 Difference]: Start difference. First operand 238 states and 588 transitions. Second operand 19 states. [2020-10-15 16:24:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:17,040 INFO L93 Difference]: Finished difference Result 341 states and 793 transitions. [2020-10-15 16:24:17,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:24:17,043 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:17,044 INFO L225 Difference]: With dead ends: 341 [2020-10-15 16:24:17,044 INFO L226 Difference]: Without dead ends: 337 [2020-10-15 16:24:17,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:24:17,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-15 16:24:17,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 243. [2020-10-15 16:24:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-15 16:24:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 601 transitions. [2020-10-15 16:24:17,048 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 601 transitions. Word has length 15 [2020-10-15 16:24:17,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:17,049 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 601 transitions. [2020-10-15 16:24:17,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 601 transitions. [2020-10-15 16:24:17,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:17,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:17,049 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:17,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:17,250 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:17,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:17,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1379705412, now seen corresponding path program 254 times [2020-10-15 16:24:17,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:17,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497815213] [2020-10-15 16:24:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:17,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497815213] [2020-10-15 16:24:17,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295401392] [2020-10-15 16:24:17,533 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:17,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:17,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:18,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:18,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:18,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685232477] [2020-10-15 16:24:18,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:18,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:18,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:18,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:18,023 INFO L87 Difference]: Start difference. First operand 243 states and 601 transitions. Second operand 19 states. [2020-10-15 16:24:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:18,949 INFO L93 Difference]: Finished difference Result 341 states and 794 transitions. [2020-10-15 16:24:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:24:18,952 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:18,953 INFO L225 Difference]: With dead ends: 341 [2020-10-15 16:24:18,953 INFO L226 Difference]: Without dead ends: 326 [2020-10-15 16:24:18,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:24:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-15 16:24:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 244. [2020-10-15 16:24:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-15 16:24:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 601 transitions. [2020-10-15 16:24:18,957 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 601 transitions. Word has length 15 [2020-10-15 16:24:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:18,957 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 601 transitions. [2020-10-15 16:24:18,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 601 transitions. [2020-10-15 16:24:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:18,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:18,958 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:19,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-10-15 16:24:19,158 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:19,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734242, now seen corresponding path program 255 times [2020-10-15 16:24:19,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:19,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774473263] [2020-10-15 16:24:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:19,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774473263] [2020-10-15 16:24:19,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991453302] [2020-10-15 16:24:19,437 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:19,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:19,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:19,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:19,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:19,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:19,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:19,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750467529] [2020-10-15 16:24:19,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:19,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:19,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:19,962 INFO L87 Difference]: Start difference. First operand 244 states and 601 transitions. Second operand 19 states. [2020-10-15 16:24:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:21,159 INFO L93 Difference]: Finished difference Result 339 states and 790 transitions. [2020-10-15 16:24:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:24:21,162 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:21,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:21,163 INFO L225 Difference]: With dead ends: 339 [2020-10-15 16:24:21,163 INFO L226 Difference]: Without dead ends: 328 [2020-10-15 16:24:21,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:24:21,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-15 16:24:21,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 242. [2020-10-15 16:24:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-15 16:24:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 596 transitions. [2020-10-15 16:24:21,168 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 596 transitions. Word has length 15 [2020-10-15 16:24:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:21,168 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 596 transitions. [2020-10-15 16:24:21,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 596 transitions. [2020-10-15 16:24:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:21,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:21,169 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:21,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:21,379 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:21,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:21,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1407411042, now seen corresponding path program 256 times [2020-10-15 16:24:21,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:21,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27933306] [2020-10-15 16:24:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:21,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27933306] [2020-10-15 16:24:21,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278982304] [2020-10-15 16:24:21,666 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:21,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:21,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:21,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:22,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:22,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:22,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821758882] [2020-10-15 16:24:22,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:22,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:22,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:22,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:22,318 INFO L87 Difference]: Start difference. First operand 242 states and 596 transitions. Second operand 19 states. [2020-10-15 16:24:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:23,862 INFO L93 Difference]: Finished difference Result 344 states and 797 transitions. [2020-10-15 16:24:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:24:23,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:23,866 INFO L225 Difference]: With dead ends: 344 [2020-10-15 16:24:23,867 INFO L226 Difference]: Without dead ends: 331 [2020-10-15 16:24:23,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:24:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-15 16:24:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 242. [2020-10-15 16:24:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-15 16:24:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 594 transitions. [2020-10-15 16:24:23,870 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 594 transitions. Word has length 15 [2020-10-15 16:24:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:23,870 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 594 transitions. [2020-10-15 16:24:23,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 594 transitions. [2020-10-15 16:24:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:23,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:23,871 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:24,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:24,072 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:24,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1407439872, now seen corresponding path program 257 times [2020-10-15 16:24:24,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:24,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808461430] [2020-10-15 16:24:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:24,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808461430] [2020-10-15 16:24:24,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167678110] [2020-10-15 16:24:24,351 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:24,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:24:24,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:24,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:30,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:30,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:30,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182010484] [2020-10-15 16:24:30,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:30,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:30,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:30,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-15 16:24:30,136 INFO L87 Difference]: Start difference. First operand 242 states and 594 transitions. Second operand 19 states. [2020-10-15 16:24:34,667 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 16:24:39,055 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 16:24:41,697 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 16:24:42,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:42,140 INFO L93 Difference]: Finished difference Result 327 states and 762 transitions. [2020-10-15 16:24:42,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:24:42,143 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:42,144 INFO L225 Difference]: With dead ends: 327 [2020-10-15 16:24:42,144 INFO L226 Difference]: Without dead ends: 323 [2020-10-15 16:24:42,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-15 16:24:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-15 16:24:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 240. [2020-10-15 16:24:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-15 16:24:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 590 transitions. [2020-10-15 16:24:42,147 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 590 transitions. Word has length 15 [2020-10-15 16:24:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:42,148 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 590 transitions. [2020-10-15 16:24:42,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 590 transitions. [2020-10-15 16:24:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:42,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:42,148 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:42,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:42,349 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:42,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:42,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2060879712, now seen corresponding path program 258 times [2020-10-15 16:24:42,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:42,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915973432] [2020-10-15 16:24:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:42,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915973432] [2020-10-15 16:24:42,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091890058] [2020-10-15 16:24:42,662 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:42,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:24:42,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:42,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:42,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:43,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:43,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:43,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830608271] [2020-10-15 16:24:43,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:43,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:43,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:43,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:43,150 INFO L87 Difference]: Start difference. First operand 240 states and 590 transitions. Second operand 19 states. [2020-10-15 16:24:43,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:43,978 INFO L93 Difference]: Finished difference Result 291 states and 682 transitions. [2020-10-15 16:24:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:24:43,981 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:43,982 INFO L225 Difference]: With dead ends: 291 [2020-10-15 16:24:43,982 INFO L226 Difference]: Without dead ends: 289 [2020-10-15 16:24:43,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:24:43,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-15 16:24:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 246. [2020-10-15 16:24:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-15 16:24:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 605 transitions. [2020-10-15 16:24:43,986 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 605 transitions. Word has length 15 [2020-10-15 16:24:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:43,986 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 605 transitions. [2020-10-15 16:24:43,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 605 transitions. [2020-10-15 16:24:43,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:43,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:43,986 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:44,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:44,187 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:44,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:44,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2060878751, now seen corresponding path program 259 times [2020-10-15 16:24:44,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:44,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097980204] [2020-10-15 16:24:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:44,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097980204] [2020-10-15 16:24:44,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88206503] [2020-10-15 16:24:44,494 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:44,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:45,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:45,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:45,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525726756] [2020-10-15 16:24:45,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:45,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:45,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:45,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:45,026 INFO L87 Difference]: Start difference. First operand 246 states and 605 transitions. Second operand 19 states. [2020-10-15 16:24:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:45,938 INFO L93 Difference]: Finished difference Result 316 states and 735 transitions. [2020-10-15 16:24:45,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:24:45,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:45,942 INFO L225 Difference]: With dead ends: 316 [2020-10-15 16:24:45,942 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 16:24:45,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:24:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 16:24:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 245. [2020-10-15 16:24:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-15 16:24:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 602 transitions. [2020-10-15 16:24:45,946 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 602 transitions. Word has length 15 [2020-10-15 16:24:45,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:45,946 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 602 transitions. [2020-10-15 16:24:45,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 602 transitions. [2020-10-15 16:24:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:45,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:45,947 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:46,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-15 16:24:46,148 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2060849921, now seen corresponding path program 260 times [2020-10-15 16:24:46,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:46,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315913958] [2020-10-15 16:24:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:46,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315913958] [2020-10-15 16:24:46,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420103281] [2020-10-15 16:24:46,458 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:46,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:46,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:46,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:49,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:49,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:49,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585649858] [2020-10-15 16:24:49,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:49,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:49,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:49,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:49,583 INFO L87 Difference]: Start difference. First operand 245 states and 602 transitions. Second operand 19 states. [2020-10-15 16:24:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:50,687 INFO L93 Difference]: Finished difference Result 330 states and 766 transitions. [2020-10-15 16:24:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:24:50,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:50,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:50,691 INFO L225 Difference]: With dead ends: 330 [2020-10-15 16:24:50,691 INFO L226 Difference]: Without dead ends: 326 [2020-10-15 16:24:50,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:24:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-15 16:24:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 244. [2020-10-15 16:24:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-15 16:24:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 599 transitions. [2020-10-15 16:24:50,695 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 599 transitions. Word has length 15 [2020-10-15 16:24:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:50,695 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 599 transitions. [2020-10-15 16:24:50,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:50,695 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 599 transitions. [2020-10-15 16:24:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:50,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:50,696 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:50,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-15 16:24:50,897 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2059956191, now seen corresponding path program 261 times [2020-10-15 16:24:50,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:50,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630865181] [2020-10-15 16:24:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:51,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630865181] [2020-10-15 16:24:51,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004730992] [2020-10-15 16:24:51,207 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:51,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:24:51,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:51,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:51,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:51,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:51,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546857494] [2020-10-15 16:24:51,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:51,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:51,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:51,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:51,807 INFO L87 Difference]: Start difference. First operand 244 states and 599 transitions. Second operand 19 states. [2020-10-15 16:24:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:53,164 INFO L93 Difference]: Finished difference Result 328 states and 761 transitions. [2020-10-15 16:24:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:24:53,167 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:53,168 INFO L225 Difference]: With dead ends: 328 [2020-10-15 16:24:53,168 INFO L226 Difference]: Without dead ends: 324 [2020-10-15 16:24:53,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:24:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-15 16:24:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 251. [2020-10-15 16:24:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-15 16:24:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 616 transitions. [2020-10-15 16:24:53,172 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 616 transitions. Word has length 15 [2020-10-15 16:24:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:53,173 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 616 transitions. [2020-10-15 16:24:53,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 616 transitions. [2020-10-15 16:24:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:53,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:53,173 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:53,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-15 16:24:53,374 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:53,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2059955230, now seen corresponding path program 262 times [2020-10-15 16:24:53,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:53,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616240060] [2020-10-15 16:24:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:53,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616240060] [2020-10-15 16:24:53,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658824303] [2020-10-15 16:24:53,799 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:53,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:53,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:53,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:02,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:02,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:02,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936732840] [2020-10-15 16:25:02,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:02,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:02,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:02,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-15 16:25:02,889 INFO L87 Difference]: Start difference. First operand 251 states and 616 transitions. Second operand 19 states. [2020-10-15 16:25:07,581 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 16:25:11,825 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 16:25:14,256 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 16:25:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:14,972 INFO L93 Difference]: Finished difference Result 348 states and 801 transitions. [2020-10-15 16:25:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:25:14,975 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:14,976 INFO L225 Difference]: With dead ends: 348 [2020-10-15 16:25:14,976 INFO L226 Difference]: Without dead ends: 332 [2020-10-15 16:25:14,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-15 16:25:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-15 16:25:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 254. [2020-10-15 16:25:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-15 16:25:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 619 transitions. [2020-10-15 16:25:14,980 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 619 transitions. Word has length 15 [2020-10-15 16:25:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:14,980 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 619 transitions. [2020-10-15 16:25:14,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 619 transitions. [2020-10-15 16:25:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:14,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:14,981 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:15,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:15,182 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:15,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2059926400, now seen corresponding path program 263 times [2020-10-15 16:25:15,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:15,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140735462] [2020-10-15 16:25:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:15,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140735462] [2020-10-15 16:25:15,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249422598] [2020-10-15 16:25:15,491 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:15,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:25:15,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:15,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:15,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:16,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:16,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:16,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108787999] [2020-10-15 16:25:16,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:16,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:16,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:16,145 INFO L87 Difference]: Start difference. First operand 254 states and 619 transitions. Second operand 19 states. [2020-10-15 16:25:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:17,765 INFO L93 Difference]: Finished difference Result 342 states and 787 transitions. [2020-10-15 16:25:17,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:25:17,769 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:17,769 INFO L225 Difference]: With dead ends: 342 [2020-10-15 16:25:17,770 INFO L226 Difference]: Without dead ends: 331 [2020-10-15 16:25:17,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:25:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-15 16:25:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 250. [2020-10-15 16:25:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-15 16:25:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 611 transitions. [2020-10-15 16:25:17,773 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 611 transitions. Word has length 15 [2020-10-15 16:25:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:17,773 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 611 transitions. [2020-10-15 16:25:17,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 611 transitions. [2020-10-15 16:25:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:17,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:17,774 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:17,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-10-15 16:25:17,975 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2032250561, now seen corresponding path program 264 times [2020-10-15 16:25:17,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:17,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116119486] [2020-10-15 16:25:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:18,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116119486] [2020-10-15 16:25:18,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916295342] [2020-10-15 16:25:18,292 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:18,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:25:18,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:18,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:18,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:18,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:18,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075527342] [2020-10-15 16:25:18,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:18,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:18,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:18,793 INFO L87 Difference]: Start difference. First operand 250 states and 611 transitions. Second operand 19 states. [2020-10-15 16:25:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:19,928 INFO L93 Difference]: Finished difference Result 326 states and 755 transitions. [2020-10-15 16:25:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:25:19,931 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:19,932 INFO L225 Difference]: With dead ends: 326 [2020-10-15 16:25:19,932 INFO L226 Difference]: Without dead ends: 322 [2020-10-15 16:25:19,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:25:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-15 16:25:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 255. [2020-10-15 16:25:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-15 16:25:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 623 transitions. [2020-10-15 16:25:19,936 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 623 transitions. Word has length 15 [2020-10-15 16:25:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:19,936 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 623 transitions. [2020-10-15 16:25:19,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 623 transitions. [2020-10-15 16:25:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:19,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:19,937 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:20,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-10-15 16:25:20,138 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:20,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2032220770, now seen corresponding path program 265 times [2020-10-15 16:25:20,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:20,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778711385] [2020-10-15 16:25:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:20,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778711385] [2020-10-15 16:25:20,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540643847] [2020-10-15 16:25:20,462 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:20,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:20,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:20,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:20,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885541720] [2020-10-15 16:25:20,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:20,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:20,929 INFO L87 Difference]: Start difference. First operand 255 states and 623 transitions. Second operand 19 states. [2020-10-15 16:25:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:21,871 INFO L93 Difference]: Finished difference Result 341 states and 782 transitions. [2020-10-15 16:25:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:25:21,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:21,875 INFO L225 Difference]: With dead ends: 341 [2020-10-15 16:25:21,875 INFO L226 Difference]: Without dead ends: 330 [2020-10-15 16:25:21,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:25:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-15 16:25:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 251. [2020-10-15 16:25:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-15 16:25:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 615 transitions. [2020-10-15 16:25:21,879 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 615 transitions. Word has length 15 [2020-10-15 16:25:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:21,880 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 615 transitions. [2020-10-15 16:25:21,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:21,880 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 615 transitions. [2020-10-15 16:25:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:21,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:21,880 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:22,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:22,081 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1173375070, now seen corresponding path program 266 times [2020-10-15 16:25:22,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:22,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255439565] [2020-10-15 16:25:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:22,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255439565] [2020-10-15 16:25:22,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692747437] [2020-10-15 16:25:22,420 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:22,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:25:22,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:22,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:22,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:23,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:23,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:23,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590963964] [2020-10-15 16:25:23,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:23,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:23,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:23,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:23,107 INFO L87 Difference]: Start difference. First operand 251 states and 615 transitions. Second operand 19 states. [2020-10-15 16:25:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:24,249 INFO L93 Difference]: Finished difference Result 325 states and 750 transitions. [2020-10-15 16:25:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:25:24,252 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:24,253 INFO L225 Difference]: With dead ends: 325 [2020-10-15 16:25:24,253 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 16:25:24,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:25:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 16:25:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 249. [2020-10-15 16:25:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-15 16:25:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 610 transitions. [2020-10-15 16:25:24,261 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 610 transitions. Word has length 15 [2020-10-15 16:25:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:24,261 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 610 transitions. [2020-10-15 16:25:24,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 610 transitions. [2020-10-15 16:25:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:24,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:24,262 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:24,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:24,463 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:24,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345279, now seen corresponding path program 267 times [2020-10-15 16:25:24,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:24,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215127321] [2020-10-15 16:25:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:24,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215127321] [2020-10-15 16:25:24,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351320529] [2020-10-15 16:25:24,804 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:24,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:25:24,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:24,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:27,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:27,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:27,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817112583] [2020-10-15 16:25:27,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:27,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:27,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:27,567 INFO L87 Difference]: Start difference. First operand 249 states and 610 transitions. Second operand 19 states. [2020-10-15 16:25:27,850 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 16:25:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:29,106 INFO L93 Difference]: Finished difference Result 320 states and 735 transitions. [2020-10-15 16:25:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:25:29,110 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:29,111 INFO L225 Difference]: With dead ends: 320 [2020-10-15 16:25:29,111 INFO L226 Difference]: Without dead ends: 307 [2020-10-15 16:25:29,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:25:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-15 16:25:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 246. [2020-10-15 16:25:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-15 16:25:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 602 transitions. [2020-10-15 16:25:29,114 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 602 transitions. Word has length 15 [2020-10-15 16:25:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:29,115 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 602 transitions. [2020-10-15 16:25:29,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 602 transitions. [2020-10-15 16:25:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:29,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:29,115 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:29,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:29,316 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:29,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1143823359, now seen corresponding path program 268 times [2020-10-15 16:25:29,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:29,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823409364] [2020-10-15 16:25:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:29,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823409364] [2020-10-15 16:25:29,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655017218] [2020-10-15 16:25:29,725 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:29,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:25:29,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:30,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:30,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304951380] [2020-10-15 16:25:30,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:30,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:30,309 INFO L87 Difference]: Start difference. First operand 246 states and 602 transitions. Second operand 19 states. [2020-10-15 16:25:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:30,910 INFO L93 Difference]: Finished difference Result 300 states and 697 transitions. [2020-10-15 16:25:30,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:25:30,913 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:30,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:30,914 INFO L225 Difference]: With dead ends: 300 [2020-10-15 16:25:30,914 INFO L226 Difference]: Without dead ends: 289 [2020-10-15 16:25:30,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:25:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-15 16:25:30,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 248. [2020-10-15 16:25:30,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-15 16:25:30,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 604 transitions. [2020-10-15 16:25:30,918 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 604 transitions. Word has length 15 [2020-10-15 16:25:30,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:30,919 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 604 transitions. [2020-10-15 16:25:30,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:30,919 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 604 transitions. [2020-10-15 16:25:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:30,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:30,919 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:31,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-10-15 16:25:31,120 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:31,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:31,120 INFO L82 PathProgramCache]: Analyzing trace with hash 439566480, now seen corresponding path program 269 times [2020-10-15 16:25:31,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:31,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952632576] [2020-10-15 16:25:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:31,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952632576] [2020-10-15 16:25:31,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596295574] [2020-10-15 16:25:31,577 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:31,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:25:31,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:31,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:31,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:32,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:32,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:32,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174197382] [2020-10-15 16:25:32,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:32,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:32,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:32,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:32,125 INFO L87 Difference]: Start difference. First operand 248 states and 604 transitions. Second operand 19 states. [2020-10-15 16:25:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:32,771 INFO L93 Difference]: Finished difference Result 308 states and 716 transitions. [2020-10-15 16:25:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:25:32,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:32,775 INFO L225 Difference]: With dead ends: 308 [2020-10-15 16:25:32,775 INFO L226 Difference]: Without dead ends: 306 [2020-10-15 16:25:32,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:25:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-15 16:25:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 254. [2020-10-15 16:25:32,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-15 16:25:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-15 16:25:32,783 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-15 16:25:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:32,783 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-15 16:25:32,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-15 16:25:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:32,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:32,784 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:32,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:32,984 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash 439595310, now seen corresponding path program 270 times [2020-10-15 16:25:32,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:32,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359797481] [2020-10-15 16:25:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:33,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359797481] [2020-10-15 16:25:33,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313729357] [2020-10-15 16:25:33,404 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:33,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:25:33,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:33,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:33,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:36,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:36,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:36,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236008278] [2020-10-15 16:25:36,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:36,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:36,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:36,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:36,336 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-15 16:25:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:37,352 INFO L93 Difference]: Finished difference Result 335 states and 780 transitions. [2020-10-15 16:25:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:25:37,355 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:37,356 INFO L225 Difference]: With dead ends: 335 [2020-10-15 16:25:37,356 INFO L226 Difference]: Without dead ends: 332 [2020-10-15 16:25:37,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:25:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-15 16:25:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 252. [2020-10-15 16:25:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-15 16:25:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 616 transitions. [2020-10-15 16:25:37,360 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 616 transitions. Word has length 15 [2020-10-15 16:25:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:37,360 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 616 transitions. [2020-10-15 16:25:37,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 616 transitions. [2020-10-15 16:25:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:37,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:37,361 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:37,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-10-15 16:25:37,562 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:37,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:37,563 INFO L82 PathProgramCache]: Analyzing trace with hash 440489040, now seen corresponding path program 271 times [2020-10-15 16:25:37,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:37,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441389255] [2020-10-15 16:25:37,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:37,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441389255] [2020-10-15 16:25:37,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424414459] [2020-10-15 16:25:37,949 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:37,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:42,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:42,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:42,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965975178] [2020-10-15 16:25:42,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:42,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:42,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:42,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:42,700 INFO L87 Difference]: Start difference. First operand 252 states and 616 transitions. Second operand 19 states. [2020-10-15 16:25:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:44,023 INFO L93 Difference]: Finished difference Result 329 states and 762 transitions. [2020-10-15 16:25:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:25:44,027 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:44,027 INFO L225 Difference]: With dead ends: 329 [2020-10-15 16:25:44,028 INFO L226 Difference]: Without dead ends: 327 [2020-10-15 16:25:44,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:25:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-15 16:25:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 254. [2020-10-15 16:25:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-15 16:25:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-15 16:25:44,032 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-15 16:25:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:44,032 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-15 16:25:44,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-15 16:25:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:44,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:44,032 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:44,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-15 16:25:44,233 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:44,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:44,233 INFO L82 PathProgramCache]: Analyzing trace with hash 440490001, now seen corresponding path program 272 times [2020-10-15 16:25:44,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:44,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90276952] [2020-10-15 16:25:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:44,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90276952] [2020-10-15 16:25:44,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50399677] [2020-10-15 16:25:44,616 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:44,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:25:44,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:44,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:44,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:47,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:47,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:47,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854568561] [2020-10-15 16:25:47,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:47,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2020-10-15 16:25:47,741 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-15 16:25:52,263 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 16:25:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:53,231 INFO L93 Difference]: Finished difference Result 362 states and 839 transitions. [2020-10-15 16:25:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:25:53,235 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:53,236 INFO L225 Difference]: With dead ends: 362 [2020-10-15 16:25:53,236 INFO L226 Difference]: Without dead ends: 358 [2020-10-15 16:25:53,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=256, Invalid=555, Unknown=1, NotChecked=0, Total=812 [2020-10-15 16:25:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-15 16:25:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 254. [2020-10-15 16:25:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-15 16:25:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-15 16:25:53,244 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-15 16:25:53,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:53,244 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-15 16:25:53,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-15 16:25:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:53,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:53,245 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:53,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-15 16:25:53,445 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:53,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:53,446 INFO L82 PathProgramCache]: Analyzing trace with hash 440518831, now seen corresponding path program 273 times [2020-10-15 16:25:53,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:53,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502405012] [2020-10-15 16:25:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:53,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502405012] [2020-10-15 16:25:53,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938979377] [2020-10-15 16:25:53,828 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:53,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:25:53,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:53,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:53,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:54,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:54,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:54,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78763438] [2020-10-15 16:25:54,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:54,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:54,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:54,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:54,529 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-15 16:25:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:55,812 INFO L93 Difference]: Finished difference Result 348 states and 807 transitions. [2020-10-15 16:25:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:25:55,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:55,816 INFO L225 Difference]: With dead ends: 348 [2020-10-15 16:25:55,817 INFO L226 Difference]: Without dead ends: 345 [2020-10-15 16:25:55,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:25:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-15 16:25:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 250. [2020-10-15 16:25:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-15 16:25:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 610 transitions. [2020-10-15 16:25:55,821 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 610 transitions. Word has length 15 [2020-10-15 16:25:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:55,821 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 610 transitions. [2020-10-15 16:25:55,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 610 transitions. [2020-10-15 16:25:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:55,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:55,821 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:56,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-15 16:25:56,022 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:56,023 INFO L82 PathProgramCache]: Analyzing trace with hash 468194670, now seen corresponding path program 274 times [2020-10-15 16:25:56,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:56,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662431652] [2020-10-15 16:25:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:56,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662431652] [2020-10-15 16:25:56,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066037316] [2020-10-15 16:25:56,361 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:56,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:25:56,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:56,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:56,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:57,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:57,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:57,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740278725] [2020-10-15 16:25:57,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:57,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:57,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:57,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:57,073 INFO L87 Difference]: Start difference. First operand 250 states and 610 transitions. Second operand 19 states. [2020-10-15 16:25:58,162 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-10-15 16:25:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:58,785 INFO L93 Difference]: Finished difference Result 322 states and 743 transitions. [2020-10-15 16:25:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:25:58,788 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:58,789 INFO L225 Difference]: With dead ends: 322 [2020-10-15 16:25:58,789 INFO L226 Difference]: Without dead ends: 320 [2020-10-15 16:25:58,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:25:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-15 16:25:58,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 253. [2020-10-15 16:25:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-15 16:25:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 619 transitions. [2020-10-15 16:25:58,793 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 619 transitions. Word has length 15 [2020-10-15 16:25:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:58,793 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 619 transitions. [2020-10-15 16:25:58,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 619 transitions. [2020-10-15 16:25:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:58,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:58,794 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:58,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-10-15 16:25:58,995 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:58,995 INFO L82 PathProgramCache]: Analyzing trace with hash 468195631, now seen corresponding path program 275 times [2020-10-15 16:25:58,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:58,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205283262] [2020-10-15 16:25:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:59,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205283262] [2020-10-15 16:25:59,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778548557] [2020-10-15 16:25:59,355 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:59,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:25:59,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:59,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:59,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:00,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:00,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:00,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780725020] [2020-10-15 16:26:00,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:00,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:00,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:00,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:00,043 INFO L87 Difference]: Start difference. First operand 253 states and 619 transitions. Second operand 19 states. [2020-10-15 16:26:01,152 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-15 16:26:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:01,704 INFO L93 Difference]: Finished difference Result 356 states and 822 transitions. [2020-10-15 16:26:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:26:01,708 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:01,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:01,709 INFO L225 Difference]: With dead ends: 356 [2020-10-15 16:26:01,709 INFO L226 Difference]: Without dead ends: 352 [2020-10-15 16:26:01,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:26:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-15 16:26:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 253. [2020-10-15 16:26:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-15 16:26:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 619 transitions. [2020-10-15 16:26:01,712 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 619 transitions. Word has length 15 [2020-10-15 16:26:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:01,713 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 619 transitions. [2020-10-15 16:26:01,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 619 transitions. [2020-10-15 16:26:01,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:01,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:01,713 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:01,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-15 16:26:01,914 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:01,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash 468224461, now seen corresponding path program 276 times [2020-10-15 16:26:01,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:01,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610262205] [2020-10-15 16:26:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:02,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610262205] [2020-10-15 16:26:02,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473472881] [2020-10-15 16:26:02,275 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:02,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:26:02,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:13,282 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 16:26:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:14,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:14,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:14,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015426420] [2020-10-15 16:26:14,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:14,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:14,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:14,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=252, Unknown=1, NotChecked=0, Total=342 [2020-10-15 16:26:14,966 INFO L87 Difference]: Start difference. First operand 253 states and 619 transitions. Second operand 19 states. [2020-10-15 16:26:19,464 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:26:30,072 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-15 16:26:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:36,300 INFO L93 Difference]: Finished difference Result 372 states and 857 transitions. [2020-10-15 16:26:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:26:36,304 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:36,305 INFO L225 Difference]: With dead ends: 372 [2020-10-15 16:26:36,305 INFO L226 Difference]: Without dead ends: 368 [2020-10-15 16:26:36,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=278, Invalid=589, Unknown=3, NotChecked=0, Total=870 [2020-10-15 16:26:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-15 16:26:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 254. [2020-10-15 16:26:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-15 16:26:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-15 16:26:36,310 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-15 16:26:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:36,310 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-15 16:26:36,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-15 16:26:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:36,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:36,311 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:36,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-10-15 16:26:36,520 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:36,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:36,520 INFO L82 PathProgramCache]: Analyzing trace with hash 469119152, now seen corresponding path program 277 times [2020-10-15 16:26:36,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:36,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958841206] [2020-10-15 16:26:36,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:36,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958841206] [2020-10-15 16:26:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018775474] [2020-10-15 16:26:36,878 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:36,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:36,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:38,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:38,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:38,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103122267] [2020-10-15 16:26:38,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:38,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:38,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:38,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:38,651 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-15 16:26:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:40,442 INFO L93 Difference]: Finished difference Result 370 states and 850 transitions. [2020-10-15 16:26:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:26:40,446 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:40,447 INFO L225 Difference]: With dead ends: 370 [2020-10-15 16:26:40,447 INFO L226 Difference]: Without dead ends: 354 [2020-10-15 16:26:40,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:26:40,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-15 16:26:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 248. [2020-10-15 16:26:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-15 16:26:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 604 transitions. [2020-10-15 16:26:40,451 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 604 transitions. Word has length 15 [2020-10-15 16:26:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:40,451 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 604 transitions. [2020-10-15 16:26:40,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 604 transitions. [2020-10-15 16:26:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:40,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:40,452 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:40,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:40,652 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:40,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:40,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1327069200, now seen corresponding path program 278 times [2020-10-15 16:26:40,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:40,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588255443] [2020-10-15 16:26:40,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:40,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588255443] [2020-10-15 16:26:40,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368830676] [2020-10-15 16:26:40,966 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:41,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:26:41,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:41,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:41,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:41,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:41,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:41,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413308107] [2020-10-15 16:26:41,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:41,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:41,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:41,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:41,558 INFO L87 Difference]: Start difference. First operand 248 states and 604 transitions. Second operand 19 states. [2020-10-15 16:26:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:43,126 INFO L93 Difference]: Finished difference Result 311 states and 720 transitions. [2020-10-15 16:26:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:26:43,130 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:43,131 INFO L225 Difference]: With dead ends: 311 [2020-10-15 16:26:43,131 INFO L226 Difference]: Without dead ends: 309 [2020-10-15 16:26:43,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=361, Invalid=829, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:26:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-15 16:26:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 252. [2020-10-15 16:26:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-15 16:26:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 615 transitions. [2020-10-15 16:26:43,136 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 615 transitions. Word has length 15 [2020-10-15 16:26:43,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:43,136 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 615 transitions. [2020-10-15 16:26:43,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 615 transitions. [2020-10-15 16:26:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:43,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:43,137 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:43,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2020-10-15 16:26:43,349 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:43,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1327070161, now seen corresponding path program 279 times [2020-10-15 16:26:43,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:43,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971771232] [2020-10-15 16:26:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:43,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971771232] [2020-10-15 16:26:43,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132332701] [2020-10-15 16:26:43,679 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:43,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:26:43,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:44,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:44,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:44,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736087245] [2020-10-15 16:26:44,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:44,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:44,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:44,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:44,299 INFO L87 Difference]: Start difference. First operand 252 states and 615 transitions. Second operand 19 states. [2020-10-15 16:26:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:45,899 INFO L93 Difference]: Finished difference Result 338 states and 777 transitions. [2020-10-15 16:26:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:26:45,903 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:45,904 INFO L225 Difference]: With dead ends: 338 [2020-10-15 16:26:45,904 INFO L226 Difference]: Without dead ends: 335 [2020-10-15 16:26:45,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:26:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-15 16:26:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 251. [2020-10-15 16:26:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-15 16:26:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 612 transitions. [2020-10-15 16:26:45,908 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 612 transitions. Word has length 15 [2020-10-15 16:26:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:45,909 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 612 transitions. [2020-10-15 16:26:45,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 612 transitions. [2020-10-15 16:26:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:45,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:45,909 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:46,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:46,113 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:46,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1327098991, now seen corresponding path program 280 times [2020-10-15 16:26:46,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:46,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051597280] [2020-10-15 16:26:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:46,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051597280] [2020-10-15 16:26:46,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774813065] [2020-10-15 16:26:46,444 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:46,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:26:46,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:46,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:47,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:47,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:47,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200717317] [2020-10-15 16:26:47,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:47,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:47,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:47,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:47,322 INFO L87 Difference]: Start difference. First operand 251 states and 612 transitions. Second operand 19 states. [2020-10-15 16:26:48,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:48,907 INFO L93 Difference]: Finished difference Result 345 states and 795 transitions. [2020-10-15 16:26:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:26:48,911 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:48,912 INFO L225 Difference]: With dead ends: 345 [2020-10-15 16:26:48,912 INFO L226 Difference]: Without dead ends: 341 [2020-10-15 16:26:48,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:26:48,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-15 16:26:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 250. [2020-10-15 16:26:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-15 16:26:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 609 transitions. [2020-10-15 16:26:48,919 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 609 transitions. Word has length 15 [2020-10-15 16:26:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:48,919 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 609 transitions. [2020-10-15 16:26:48,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 609 transitions. [2020-10-15 16:26:48,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:48,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:48,920 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:49,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:49,121 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:49,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:49,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1327992721, now seen corresponding path program 281 times [2020-10-15 16:26:49,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:49,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518668447] [2020-10-15 16:26:49,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:49,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518668447] [2020-10-15 16:26:49,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119261756] [2020-10-15 16:26:49,441 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:49,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:26:49,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:49,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:49,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:50,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:50,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:50,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787962695] [2020-10-15 16:26:50,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:50,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:50,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:50,041 INFO L87 Difference]: Start difference. First operand 250 states and 609 transitions. Second operand 19 states. [2020-10-15 16:26:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:51,559 INFO L93 Difference]: Finished difference Result 354 states and 811 transitions. [2020-10-15 16:26:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:26:51,563 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:51,564 INFO L225 Difference]: With dead ends: 354 [2020-10-15 16:26:51,564 INFO L226 Difference]: Without dead ends: 350 [2020-10-15 16:26:51,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:26:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-15 16:26:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 255. [2020-10-15 16:26:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-15 16:26:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2020-10-15 16:26:51,569 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 15 [2020-10-15 16:26:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:51,569 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2020-10-15 16:26:51,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2020-10-15 16:26:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:51,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:51,570 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:51,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:51,780 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:51,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:51,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1327993682, now seen corresponding path program 282 times [2020-10-15 16:26:51,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:51,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013883799] [2020-10-15 16:26:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:52,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013883799] [2020-10-15 16:26:52,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322634084] [2020-10-15 16:26:52,105 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:52,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:26:52,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:52,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:52,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:52,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:52,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:52,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45110279] [2020-10-15 16:26:52,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:52,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:52,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:52,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:52,679 INFO L87 Difference]: Start difference. First operand 255 states and 622 transitions. Second operand 19 states. [2020-10-15 16:26:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:53,883 INFO L93 Difference]: Finished difference Result 356 states and 815 transitions. [2020-10-15 16:26:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:26:53,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:53,888 INFO L225 Difference]: With dead ends: 356 [2020-10-15 16:26:53,888 INFO L226 Difference]: Without dead ends: 341 [2020-10-15 16:26:53,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:26:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-15 16:26:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 256. [2020-10-15 16:26:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-15 16:26:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 622 transitions. [2020-10-15 16:26:53,892 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 622 transitions. Word has length 15 [2020-10-15 16:26:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:53,892 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 622 transitions. [2020-10-15 16:26:53,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 622 transitions. [2020-10-15 16:26:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:53,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:53,893 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:54,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-15 16:26:54,093 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:54,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:54,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1328022512, now seen corresponding path program 283 times [2020-10-15 16:26:54,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:54,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558664029] [2020-10-15 16:26:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:54,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558664029] [2020-10-15 16:26:54,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078411814] [2020-10-15 16:26:54,416 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:55,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:55,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:55,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993874034] [2020-10-15 16:26:55,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:55,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:55,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:55,019 INFO L87 Difference]: Start difference. First operand 256 states and 622 transitions. Second operand 19 states. [2020-10-15 16:26:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:56,689 INFO L93 Difference]: Finished difference Result 348 states and 796 transitions. [2020-10-15 16:26:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:26:56,693 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:56,694 INFO L225 Difference]: With dead ends: 348 [2020-10-15 16:26:56,694 INFO L226 Difference]: Without dead ends: 337 [2020-10-15 16:26:56,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:26:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-15 16:26:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 252. [2020-10-15 16:26:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-15 16:26:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 614 transitions. [2020-10-15 16:26:56,698 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 614 transitions. Word has length 15 [2020-10-15 16:26:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:56,698 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 614 transitions. [2020-10-15 16:26:56,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 614 transitions. [2020-10-15 16:26:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:56,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:56,699 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:56,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-15 16:26:56,899 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:56,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1355699312, now seen corresponding path program 284 times [2020-10-15 16:26:56,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:56,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625288648] [2020-10-15 16:26:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:57,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625288648] [2020-10-15 16:26:57,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107284492] [2020-10-15 16:26:57,224 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:57,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:26:57,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:57,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:57,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:57,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:57,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731064970] [2020-10-15 16:26:57,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:57,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:57,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:57,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:57,940 INFO L87 Difference]: Start difference. First operand 252 states and 614 transitions. Second operand 19 states. [2020-10-15 16:27:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:00,188 INFO L93 Difference]: Finished difference Result 344 states and 788 transitions. [2020-10-15 16:27:00,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:27:00,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:00,193 INFO L225 Difference]: With dead ends: 344 [2020-10-15 16:27:00,193 INFO L226 Difference]: Without dead ends: 331 [2020-10-15 16:27:00,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=378, Invalid=882, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:27:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-15 16:27:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 252. [2020-10-15 16:27:00,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-15 16:27:00,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 612 transitions. [2020-10-15 16:27:00,200 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 612 transitions. Word has length 15 [2020-10-15 16:27:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:00,201 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 612 transitions. [2020-10-15 16:27:00,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:00,201 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 612 transitions. [2020-10-15 16:27:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:00,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:00,201 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:00,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-15 16:27:00,402 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1355728142, now seen corresponding path program 285 times [2020-10-15 16:27:00,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:00,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327476165] [2020-10-15 16:27:00,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:00,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327476165] [2020-10-15 16:27:00,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904714054] [2020-10-15 16:27:00,731 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:00,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:27:00,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:00,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:08,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:08,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:08,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391108926] [2020-10-15 16:27:08,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:08,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:08,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:08,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=260, Unknown=2, NotChecked=0, Total=342 [2020-10-15 16:27:08,746 INFO L87 Difference]: Start difference. First operand 252 states and 612 transitions. Second operand 19 states. [2020-10-15 16:27:13,467 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 16:27:17,692 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-15 16:27:22,115 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 16:27:39,128 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 16:27:43,330 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 41 [2020-10-15 16:27:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:45,862 INFO L93 Difference]: Finished difference Result 330 states and 756 transitions. [2020-10-15 16:27:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:27:45,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:45,867 INFO L225 Difference]: With dead ends: 330 [2020-10-15 16:27:45,867 INFO L226 Difference]: Without dead ends: 326 [2020-10-15 16:27:45,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=353, Invalid=827, Unknown=10, NotChecked=0, Total=1190 [2020-10-15 16:27:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-15 16:27:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 246. [2020-10-15 16:27:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-15 16:27:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2020-10-15 16:27:45,871 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 15 [2020-10-15 16:27:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:45,871 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2020-10-15 16:27:45,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2020-10-15 16:27:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:45,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:45,871 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:46,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-15 16:27:46,072 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1363216958, now seen corresponding path program 286 times [2020-10-15 16:27:46,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:46,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399466741] [2020-10-15 16:27:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:46,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399466741] [2020-10-15 16:27:46,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399214820] [2020-10-15 16:27:46,530 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:46,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:27:46,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:46,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:46,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:47,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:47,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:47,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618337298] [2020-10-15 16:27:47,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:47,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:47,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:47,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:47,137 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand 19 states. [2020-10-15 16:27:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:47,964 INFO L93 Difference]: Finished difference Result 315 states and 727 transitions. [2020-10-15 16:27:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:27:47,968 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:47,969 INFO L225 Difference]: With dead ends: 315 [2020-10-15 16:27:47,969 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 16:27:47,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:27:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 16:27:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 250. [2020-10-15 16:27:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-15 16:27:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 612 transitions. [2020-10-15 16:27:47,973 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 612 transitions. Word has length 15 [2020-10-15 16:27:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:47,973 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 612 transitions. [2020-10-15 16:27:47,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 612 transitions. [2020-10-15 16:27:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:47,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:47,974 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:48,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:48,175 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1363188128, now seen corresponding path program 287 times [2020-10-15 16:27:48,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:48,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489458097] [2020-10-15 16:27:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:48,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489458097] [2020-10-15 16:27:48,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833955351] [2020-10-15 16:27:48,586 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:48,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:27:48,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:48,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:48,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:51,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:51,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:51,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93891484] [2020-10-15 16:27:51,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:51,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:51,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:51,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:51,584 INFO L87 Difference]: Start difference. First operand 250 states and 612 transitions. Second operand 19 states. [2020-10-15 16:27:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:52,757 INFO L93 Difference]: Finished difference Result 335 states and 777 transitions. [2020-10-15 16:27:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:27:52,761 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:52,762 INFO L225 Difference]: With dead ends: 335 [2020-10-15 16:27:52,762 INFO L226 Difference]: Without dead ends: 332 [2020-10-15 16:27:52,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=235, Invalid=521, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:27:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-15 16:27:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 248. [2020-10-15 16:27:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-15 16:27:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 606 transitions. [2020-10-15 16:27:52,765 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 606 transitions. Word has length 15 [2020-10-15 16:27:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:52,766 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 606 transitions. [2020-10-15 16:27:52,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 606 transitions. [2020-10-15 16:27:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:52,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:52,766 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:52,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-15 16:27:52,967 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1362294398, now seen corresponding path program 288 times [2020-10-15 16:27:52,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:52,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488186072] [2020-10-15 16:27:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:53,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488186072] [2020-10-15 16:27:53,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000667499] [2020-10-15 16:27:53,336 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:53,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:27:53,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:53,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:53,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:54,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:54,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:54,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978386963] [2020-10-15 16:27:54,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:54,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:54,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:54,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:54,039 INFO L87 Difference]: Start difference. First operand 248 states and 606 transitions. Second operand 19 states. [2020-10-15 16:27:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:55,617 INFO L93 Difference]: Finished difference Result 327 states and 755 transitions. [2020-10-15 16:27:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:27:55,620 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:55,621 INFO L225 Difference]: With dead ends: 327 [2020-10-15 16:27:55,621 INFO L226 Difference]: Without dead ends: 325 [2020-10-15 16:27:55,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:27:55,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-15 16:27:55,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 250. [2020-10-15 16:27:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-15 16:27:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 612 transitions. [2020-10-15 16:27:55,625 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 612 transitions. Word has length 15 [2020-10-15 16:27:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:55,625 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 612 transitions. [2020-10-15 16:27:55,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 612 transitions. [2020-10-15 16:27:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:55,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:55,626 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:55,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-15 16:27:55,827 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:55,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:55,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1362293437, now seen corresponding path program 289 times [2020-10-15 16:27:55,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:55,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905789449] [2020-10-15 16:27:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:56,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905789449] [2020-10-15 16:27:56,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840034279] [2020-10-15 16:27:56,188 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:56,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:56,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:58,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:58,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:58,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950687566] [2020-10-15 16:27:58,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:58,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:58,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=261, Unknown=1, NotChecked=0, Total=342 [2020-10-15 16:27:58,977 INFO L87 Difference]: Start difference. First operand 250 states and 612 transitions. Second operand 19 states. Received shutdown request... [2020-10-15 16:27:59,469 WARN L210 SmtUtils]: Removed 2 from assertion stack [2020-10-15 16:27:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:27:59,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:59,670 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 16:27:59,674 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 16:27:59,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 04:27:59 BasicIcfg [2020-10-15 16:27:59,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 16:27:59,676 INFO L168 Benchmark]: Toolchain (without parser) took 877509.49 ms. Allocated memory was 247.5 MB in the beginning and 211.3 MB in the end (delta: -36.2 MB). Free memory was 200.3 MB in the beginning and 138.7 MB in the end (delta: 61.6 MB). Peak memory consumption was 25.4 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:59,676 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 247.5 MB. Free memory is still 221.3 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:27:59,676 INFO L168 Benchmark]: CACSL2BoogieTranslator took 725.42 ms. Allocated memory was 247.5 MB in the beginning and 300.9 MB in the end (delta: 53.5 MB). Free memory was 200.3 MB in the beginning and 254.5 MB in the end (delta: -54.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:59,677 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.17 ms. Allocated memory is still 300.9 MB. Free memory was 254.5 MB in the beginning and 252.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:59,677 INFO L168 Benchmark]: Boogie Preprocessor took 24.51 ms. Allocated memory is still 300.9 MB. Free memory was 252.0 MB in the beginning and 249.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:59,677 INFO L168 Benchmark]: RCFGBuilder took 486.09 ms. Allocated memory is still 300.9 MB. Free memory was 249.5 MB in the beginning and 230.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:59,677 INFO L168 Benchmark]: TraceAbstraction took 876222.41 ms. Allocated memory was 300.9 MB in the beginning and 211.3 MB in the end (delta: -89.7 MB). Free memory was 230.1 MB in the beginning and 138.7 MB in the end (delta: 91.4 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:59,680 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 247.5 MB. Free memory is still 221.3 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 725.42 ms. Allocated memory was 247.5 MB in the beginning and 300.9 MB in the end (delta: 53.5 MB). Free memory was 200.3 MB in the beginning and 254.5 MB in the end (delta: -54.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 42.17 ms. Allocated memory is still 300.9 MB. Free memory was 254.5 MB in the beginning and 252.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 24.51 ms. Allocated memory is still 300.9 MB. Free memory was 252.0 MB in the beginning and 249.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 486.09 ms. Allocated memory is still 300.9 MB. Free memory was 249.5 MB in the beginning and 230.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 876222.41 ms. Allocated memory was 300.9 MB in the beginning and 211.3 MB in the end (delta: -89.7 MB). Free memory was 230.1 MB in the beginning and 138.7 MB in the end (delta: 91.4 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.0s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (250states) and FLOYD_HOARE automaton (currently 8 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 54ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 876.1s, OverallIterations: 318, TraceHistogramMax: 6, AutomataDifference: 534.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.1s, HoareTripleCheckerStatistics: 4356 SDtfs, 33580 SDslu, 32659 SDs, 0 SdLazy, 23903 SolverSat, 10302 SolverUnsat, 51 SolverUnknown, 0 SolverNotchecked, 137.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9474 GetRequests, 1563 SyntacticMatches, 285 SemanticMatches, 7625 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52927 ImplicationChecksByTransitivity, 624.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=282occurred in iteration=215, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 317 MinimizatonAttempts, 21207 StatesRemovedByMinimization, 316 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 4.5s SatisfiabilityAnalysisTime, 260.2s InterpolantComputationTime, 8362 NumberOfCodeBlocks, 8360 NumberOfCodeBlocksAsserted, 1007 NumberOfCheckSat, 7734 ConstructedInterpolants, 57 QuantifiedInterpolants, 907126 SizeOfPredicates, 308 NumberOfNonLiveVariables, 28142 ConjunctsInSsa, 3256 ConjunctsInUnsatCore, 628 InterpolantComputations, 10 PerfectInterpolantSequences, 30/3832 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