/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-nondet/nondet-loop-bound-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 22:50:54,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 22:50:54,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 22:50:54,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 22:50:54,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 22:50:54,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 22:50:54,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 22:50:54,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 22:50:54,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 22:50:54,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 22:50:54,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 22:50:54,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 22:50:54,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 22:50:54,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 22:50:54,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 22:50:54,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 22:50:54,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 22:50:54,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 22:50:54,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 22:50:54,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 22:50:54,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 22:50:54,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 22:50:54,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 22:50:54,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 22:50:54,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 22:50:54,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 22:50:54,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 22:50:54,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 22:50:54,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 22:50:54,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 22:50:54,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 22:50:54,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 22:50:54,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 22:50:54,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 22:50:54,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 22:50:54,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 22:50:54,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 22:50:54,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 22:50:54,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 22:50:54,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 22:50:54,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 22:50:54,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-04-17 22:50:54,965 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 22:50:54,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 22:50:54,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 22:50:54,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 22:50:54,967 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 22:50:54,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 22:50:54,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 22:50:54,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 22:50:54,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 22:50:54,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 22:50:54,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 22:50:54,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 22:50:54,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 22:50:54,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 22:50:54,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 22:50:54,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 22:50:54,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 22:50:54,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 22:50:54,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 22:50:54,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 22:50:54,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 22:50:54,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:50:54,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 22:50:54,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 22:50:54,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 22:50:54,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 22:50:54,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 22:50:54,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 22:50:54,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 22:50:55,265 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 22:50:55,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 22:50:55,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 22:50:55,283 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 22:50:55,284 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 22:50:55,285 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-loop-bound-1.i [2020-04-17 22:50:55,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae502f74f/ca3f448ed49145699dd9d083c2118aed/FLAGfece3ecf8 [2020-04-17 22:50:55,840 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 22:50:55,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-loop-bound-1.i [2020-04-17 22:50:55,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae502f74f/ca3f448ed49145699dd9d083c2118aed/FLAGfece3ecf8 [2020-04-17 22:50:56,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae502f74f/ca3f448ed49145699dd9d083c2118aed [2020-04-17 22:50:56,156 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 22:50:56,179 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 22:50:56,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 22:50:56,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 22:50:56,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 22:50:56,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:56,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@484e6d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56, skipping insertion in model container [2020-04-17 22:50:56,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:56,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 22:50:56,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 22:50:56,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:50:56,834 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 22:50:56,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:50:56,963 INFO L208 MainTranslator]: Completed translation [2020-04-17 22:50:56,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56 WrapperNode [2020-04-17 22:50:56,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 22:50:56,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 22:50:56,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 22:50:56,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 22:50:56,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:56,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:57,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 22:50:57,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 22:50:57,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 22:50:57,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 22:50:57,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:57,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:57,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:57,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:57,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:57,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:57,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (1/1) ... [2020-04-17 22:50:57,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 22:50:57,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 22:50:57,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 22:50:57,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 22:50:57,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (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 [2020-04-17 22:50:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-04-17 22:50:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-04-17 22:50:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-04-17 22:50:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-04-17 22:50:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 22:50:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 22:50:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 22:50:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 22:50:57,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 22:50:57,104 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 22:50:57,447 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 22:50:57,447 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-04-17 22:50:57,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:50:57 BoogieIcfgContainer [2020-04-17 22:50:57,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 22:50:57,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 22:50:57,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 22:50:57,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 22:50:57,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 10:50:56" (1/3) ... [2020-04-17 22:50:57,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d7d12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:50:57, skipping insertion in model container [2020-04-17 22:50:57,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:50:56" (2/3) ... [2020-04-17 22:50:57,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d7d12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:50:57, skipping insertion in model container [2020-04-17 22:50:57,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:50:57" (3/3) ... [2020-04-17 22:50:57,462 INFO L109 eAbstractionObserver]: Analyzing ICFG nondet-loop-bound-1.i [2020-04-17 22:50:57,473 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 22:50:57,474 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 22:50:57,482 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 22:50:57,485 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 22:50:57,512 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,513 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,513 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,514 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,514 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,515 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,515 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,516 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,516 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,516 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,517 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,517 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,517 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,518 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,518 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,518 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,519 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,523 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,523 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,524 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,524 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,524 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,539 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,540 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,540 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,541 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,541 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,541 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:50:57,558 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-04-17 22:50:57,579 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:50:57,579 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:50:57,579 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:50:57,579 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:50:57,580 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:50:57,580 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:50:57,580 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:50:57,580 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:50:57,596 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 58 transitions, 126 flow [2020-04-17 22:50:57,598 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 58 transitions, 126 flow [2020-04-17 22:50:57,644 INFO L129 PetriNetUnfolder]: 4/68 cut-off events. [2020-04-17 22:50:57,644 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:50:57,650 INFO L80 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 4/68 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. 0/61 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2020-04-17 22:50:57,653 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 58 transitions, 126 flow [2020-04-17 22:50:57,676 INFO L129 PetriNetUnfolder]: 4/68 cut-off events. [2020-04-17 22:50:57,676 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:50:57,677 INFO L80 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 4/68 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. 0/61 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2020-04-17 22:50:57,680 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 592 [2020-04-17 22:50:57,681 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:50:59,156 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-04-17 22:50:59,507 WARN L192 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-04-17 22:50:59,739 WARN L192 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-04-17 22:50:59,981 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-04-17 22:51:00,085 INFO L206 etLargeBlockEncoding]: Checked pairs total: 486 [2020-04-17 22:51:00,085 INFO L214 etLargeBlockEncoding]: Total number of compositions: 51 [2020-04-17 22:51:00,091 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 12 transitions, 34 flow [2020-04-17 22:51:00,111 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 22:51:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 22:51:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:51:00,125 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:00,126 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:51:00,126 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:00,133 INFO L82 PathProgramCache]: Analyzing trace with hash 229686, now seen corresponding path program 1 times [2020-04-17 22:51:00,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:00,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36278827] [2020-04-17 22:51:00,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:00,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36278827] [2020-04-17 22:51:00,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:00,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:51:00,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106043982] [2020-04-17 22:51:00,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:51:00,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:00,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:51:00,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:00,399 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-04-17 22:51:00,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:00,458 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2020-04-17 22:51:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:51:00,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:51:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:00,481 INFO L225 Difference]: With dead ends: 35 [2020-04-17 22:51:00,481 INFO L226 Difference]: Without dead ends: 31 [2020-04-17 22:51:00,482 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-04-17 22:51:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-04-17 22:51:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-04-17 22:51:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 51 transitions. [2020-04-17 22:51:00,530 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 51 transitions. Word has length 3 [2020-04-17 22:51:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:00,530 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 51 transitions. [2020-04-17 22:51:00,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:51:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 51 transitions. [2020-04-17 22:51:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-17 22:51:00,531 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:00,531 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:00,532 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1647647331, now seen corresponding path program 1 times [2020-04-17 22:51:00,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:00,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248907086] [2020-04-17 22:51:00,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:00,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248907086] [2020-04-17 22:51:00,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:00,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:51:00,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497299493] [2020-04-17 22:51:00,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:51:00,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:00,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:51:00,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:51:00,643 INFO L87 Difference]: Start difference. First operand 31 states and 51 transitions. Second operand 4 states. [2020-04-17 22:51:00,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:00,668 INFO L93 Difference]: Finished difference Result 26 states and 42 transitions. [2020-04-17 22:51:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:51:00,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-04-17 22:51:00,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:00,670 INFO L225 Difference]: With dead ends: 26 [2020-04-17 22:51:00,670 INFO L226 Difference]: Without dead ends: 24 [2020-04-17 22:51:00,671 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:51:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-04-17 22:51:00,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-04-17 22:51:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-04-17 22:51:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 39 transitions. [2020-04-17 22:51:00,677 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 39 transitions. Word has length 7 [2020-04-17 22:51:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:00,677 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 39 transitions. [2020-04-17 22:51:00,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:51:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 39 transitions. [2020-04-17 22:51:00,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:51:00,678 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:00,678 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:00,678 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:00,679 INFO L82 PathProgramCache]: Analyzing trace with hash -462538936, now seen corresponding path program 1 times [2020-04-17 22:51:00,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:00,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446293447] [2020-04-17 22:51:00,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:00,786 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:51:00,787 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:51:00,787 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:51:00,788 WARN L363 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:51:00,788 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-04-17 22:51:00,797 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,797 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,797 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,797 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,798 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,798 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,798 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,798 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,799 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,799 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,799 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,799 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,799 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,800 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,800 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,800 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,800 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,801 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,801 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,801 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,801 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,801 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,802 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,802 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,802 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,802 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,803 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,803 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,803 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,803 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,803 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,804 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,804 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,804 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,804 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,805 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,805 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,805 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,805 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,807 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,808 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,808 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,808 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,808 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,810 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,811 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,811 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,811 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,811 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,811 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,813 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,814 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,814 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,814 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,814 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,814 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:00,816 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-04-17 22:51:00,817 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:51:00,817 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:51:00,817 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:51:00,817 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:51:00,817 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:51:00,817 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:51:00,817 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:51:00,818 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:51:00,820 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 74 transitions, 172 flow [2020-04-17 22:51:00,820 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 80 places, 74 transitions, 172 flow [2020-04-17 22:51:00,841 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2020-04-17 22:51:00,841 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-04-17 22:51:00,843 INFO L80 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2020-04-17 22:51:00,845 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 80 places, 74 transitions, 172 flow [2020-04-17 22:51:00,880 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2020-04-17 22:51:00,881 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-04-17 22:51:00,883 INFO L80 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2020-04-17 22:51:00,885 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 920 [2020-04-17 22:51:00,886 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:51:02,480 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-04-17 22:51:02,568 INFO L206 etLargeBlockEncoding]: Checked pairs total: 942 [2020-04-17 22:51:02,568 INFO L214 etLargeBlockEncoding]: Total number of compositions: 62 [2020-04-17 22:51:02,568 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 21 transitions, 66 flow [2020-04-17 22:51:02,582 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 224 states. [2020-04-17 22:51:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states. [2020-04-17 22:51:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:51:02,582 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:02,583 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:51:02,583 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:02,583 INFO L82 PathProgramCache]: Analyzing trace with hash 384194, now seen corresponding path program 1 times [2020-04-17 22:51:02,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:02,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725116018] [2020-04-17 22:51:02,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:02,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725116018] [2020-04-17 22:51:02,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:02,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:51:02,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094448606] [2020-04-17 22:51:02,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:51:02,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:02,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:51:02,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:02,625 INFO L87 Difference]: Start difference. First operand 224 states. Second operand 3 states. [2020-04-17 22:51:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:02,665 INFO L93 Difference]: Finished difference Result 185 states and 459 transitions. [2020-04-17 22:51:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:51:02,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:51:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:02,675 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:51:02,676 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 22:51:02,679 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 22:51:02,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-04-17 22:51:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-04-17 22:51:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 418 transitions. [2020-04-17 22:51:02,710 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 418 transitions. Word has length 3 [2020-04-17 22:51:02,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:02,711 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 418 transitions. [2020-04-17 22:51:02,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:51:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 418 transitions. [2020-04-17 22:51:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:51:02,712 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:02,712 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:02,712 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:02,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1694917346, now seen corresponding path program 1 times [2020-04-17 22:51:02,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:02,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857946150] [2020-04-17 22:51:02,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:02,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857946150] [2020-04-17 22:51:02,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:02,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:02,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907088672] [2020-04-17 22:51:02,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:02,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:02,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:02,808 INFO L87 Difference]: Start difference. First operand 171 states and 418 transitions. Second operand 5 states. [2020-04-17 22:51:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:02,949 INFO L93 Difference]: Finished difference Result 205 states and 460 transitions. [2020-04-17 22:51:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:02,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 22:51:02,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:02,952 INFO L225 Difference]: With dead ends: 205 [2020-04-17 22:51:02,952 INFO L226 Difference]: Without dead ends: 201 [2020-04-17 22:51:02,953 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-04-17 22:51:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 162. [2020-04-17 22:51:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 22:51:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-04-17 22:51:02,974 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 9 [2020-04-17 22:51:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:02,975 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-04-17 22:51:02,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-04-17 22:51:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:51:02,976 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:02,977 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:02,977 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1027741454, now seen corresponding path program 1 times [2020-04-17 22:51:02,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:02,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283686184] [2020-04-17 22:51:02,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:03,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283686184] [2020-04-17 22:51:03,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:03,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:03,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154405401] [2020-04-17 22:51:03,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:03,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:03,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:03,056 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 5 states. [2020-04-17 22:51:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:03,139 INFO L93 Difference]: Finished difference Result 189 states and 423 transitions. [2020-04-17 22:51:03,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:03,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-17 22:51:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:03,141 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:51:03,141 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 22:51:03,142 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 22:51:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 153. [2020-04-17 22:51:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-04-17 22:51:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 367 transitions. [2020-04-17 22:51:03,154 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 367 transitions. Word has length 13 [2020-04-17 22:51:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:03,155 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 367 transitions. [2020-04-17 22:51:03,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 367 transitions. [2020-04-17 22:51:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:51:03,157 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:03,157 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:03,157 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:03,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1792799235, now seen corresponding path program 1 times [2020-04-17 22:51:03,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:03,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449237837] [2020-04-17 22:51:03,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:03,191 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:51:03,192 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:51:03,192 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:51:03,192 WARN L363 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:51:03,193 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-04-17 22:51:03,203 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,203 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,203 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,204 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,204 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,204 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,204 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,205 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,205 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,205 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,205 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,205 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,205 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,206 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,206 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,206 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,206 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,206 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,207 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,207 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,207 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,207 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,207 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,208 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,208 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,208 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,208 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,208 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,208 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,209 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,209 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,209 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,209 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,209 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,210 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,210 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,210 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,210 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,210 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,210 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,211 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,211 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,211 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,211 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,211 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,212 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,212 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,212 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,212 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,212 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,212 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,213 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,213 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,213 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,213 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,214 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,215 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,215 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,216 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,216 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,216 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,217 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,217 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,217 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,218 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,218 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,219 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,219 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,219 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,219 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,219 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,219 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,220 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,221 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,221 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,221 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,221 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,221 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,222 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,222 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,222 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,223 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,223 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,223 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:03,224 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-04-17 22:51:03,224 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:51:03,225 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:51:03,225 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:51:03,225 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:51:03,225 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:51:03,225 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:51:03,225 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:51:03,225 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:51:03,228 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 90 transitions, 222 flow [2020-04-17 22:51:03,228 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 90 transitions, 222 flow [2020-04-17 22:51:03,244 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2020-04-17 22:51:03,245 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-04-17 22:51:03,246 INFO L80 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 110 events. 6/110 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 163 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 124. Up to 8 conditions per place. [2020-04-17 22:51:03,248 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 90 transitions, 222 flow [2020-04-17 22:51:03,262 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2020-04-17 22:51:03,263 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-04-17 22:51:03,264 INFO L80 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 110 events. 6/110 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 163 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 124. Up to 8 conditions per place. [2020-04-17 22:51:03,266 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1308 [2020-04-17 22:51:03,266 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:51:04,733 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-04-17 22:51:04,989 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-04-17 22:51:05,069 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1426 [2020-04-17 22:51:05,070 INFO L214 etLargeBlockEncoding]: Total number of compositions: 74 [2020-04-17 22:51:05,070 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 27 transitions, 96 flow [2020-04-17 22:51:05,096 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 683 states. [2020-04-17 22:51:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states. [2020-04-17 22:51:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:51:05,097 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:05,098 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:51:05,098 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:05,098 INFO L82 PathProgramCache]: Analyzing trace with hash 567457, now seen corresponding path program 1 times [2020-04-17 22:51:05,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:05,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151692452] [2020-04-17 22:51:05,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:05,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151692452] [2020-04-17 22:51:05,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:05,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:51:05,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884541276] [2020-04-17 22:51:05,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:51:05,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:05,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:51:05,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:05,147 INFO L87 Difference]: Start difference. First operand 683 states. Second operand 3 states. [2020-04-17 22:51:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:05,185 INFO L93 Difference]: Finished difference Result 600 states and 1886 transitions. [2020-04-17 22:51:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:51:05,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:51:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:05,201 INFO L225 Difference]: With dead ends: 600 [2020-04-17 22:51:05,201 INFO L226 Difference]: Without dead ends: 559 [2020-04-17 22:51:05,202 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-04-17 22:51:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2020-04-17 22:51:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-04-17 22:51:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1737 transitions. [2020-04-17 22:51:05,268 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1737 transitions. Word has length 3 [2020-04-17 22:51:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:05,269 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 1737 transitions. [2020-04-17 22:51:05,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:51:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1737 transitions. [2020-04-17 22:51:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:51:05,270 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:05,270 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:05,270 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:05,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1052273544, now seen corresponding path program 1 times [2020-04-17 22:51:05,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:05,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775616059] [2020-04-17 22:51:05,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:05,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775616059] [2020-04-17 22:51:05,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:05,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:05,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629907083] [2020-04-17 22:51:05,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:05,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:05,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:05,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:05,325 INFO L87 Difference]: Start difference. First operand 559 states and 1737 transitions. Second operand 5 states. [2020-04-17 22:51:05,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:05,429 INFO L93 Difference]: Finished difference Result 817 states and 2317 transitions. [2020-04-17 22:51:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:05,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 22:51:05,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:05,436 INFO L225 Difference]: With dead ends: 817 [2020-04-17 22:51:05,437 INFO L226 Difference]: Without dead ends: 812 [2020-04-17 22:51:05,437 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-04-17 22:51:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 585. [2020-04-17 22:51:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-04-17 22:51:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1832 transitions. [2020-04-17 22:51:05,494 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1832 transitions. Word has length 9 [2020-04-17 22:51:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:05,495 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 1832 transitions. [2020-04-17 22:51:05,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1832 transitions. [2020-04-17 22:51:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:51:05,496 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:05,496 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:05,496 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1096280394, now seen corresponding path program 1 times [2020-04-17 22:51:05,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:05,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556326445] [2020-04-17 22:51:05,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:05,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556326445] [2020-04-17 22:51:05,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:05,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:05,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801247018] [2020-04-17 22:51:05,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:05,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:05,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:05,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:05,545 INFO L87 Difference]: Start difference. First operand 585 states and 1832 transitions. Second operand 5 states. [2020-04-17 22:51:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:05,645 INFO L93 Difference]: Finished difference Result 843 states and 2406 transitions. [2020-04-17 22:51:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:05,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-17 22:51:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:05,652 INFO L225 Difference]: With dead ends: 843 [2020-04-17 22:51:05,652 INFO L226 Difference]: Without dead ends: 836 [2020-04-17 22:51:05,653 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2020-04-17 22:51:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 611. [2020-04-17 22:51:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-04-17 22:51:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1906 transitions. [2020-04-17 22:51:05,681 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1906 transitions. Word has length 13 [2020-04-17 22:51:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:05,682 INFO L479 AbstractCegarLoop]: Abstraction has 611 states and 1906 transitions. [2020-04-17 22:51:05,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1906 transitions. [2020-04-17 22:51:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:05,687 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:05,687 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:05,687 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:05,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2044985054, now seen corresponding path program 1 times [2020-04-17 22:51:05,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:05,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636394091] [2020-04-17 22:51:05,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:05,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636394091] [2020-04-17 22:51:05,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418807072] [2020-04-17 22:51:05,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:05,851 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:05,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:05,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:05,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:05,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133111165] [2020-04-17 22:51:05,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:05,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:05,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:05,957 INFO L87 Difference]: Start difference. First operand 611 states and 1906 transitions. Second operand 12 states. [2020-04-17 22:51:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:06,267 INFO L93 Difference]: Finished difference Result 1059 states and 2818 transitions. [2020-04-17 22:51:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:06,268 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 22:51:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:06,276 INFO L225 Difference]: With dead ends: 1059 [2020-04-17 22:51:06,276 INFO L226 Difference]: Without dead ends: 1052 [2020-04-17 22:51:06,278 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:51:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2020-04-17 22:51:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 591. [2020-04-17 22:51:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-04-17 22:51:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1840 transitions. [2020-04-17 22:51:06,312 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1840 transitions. Word has length 15 [2020-04-17 22:51:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:06,312 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 1840 transitions. [2020-04-17 22:51:06,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1840 transitions. [2020-04-17 22:51:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:06,316 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:06,319 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:06,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:06,525 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1258473782, now seen corresponding path program 2 times [2020-04-17 22:51:06,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:06,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94029590] [2020-04-17 22:51:06,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:06,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94029590] [2020-04-17 22:51:06,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:06,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:06,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233529501] [2020-04-17 22:51:06,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:06,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:06,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:06,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:06,589 INFO L87 Difference]: Start difference. First operand 591 states and 1840 transitions. Second operand 7 states. [2020-04-17 22:51:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:06,832 INFO L93 Difference]: Finished difference Result 1053 states and 2807 transitions. [2020-04-17 22:51:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:06,832 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-04-17 22:51:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:06,841 INFO L225 Difference]: With dead ends: 1053 [2020-04-17 22:51:06,841 INFO L226 Difference]: Without dead ends: 1045 [2020-04-17 22:51:06,842 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:51:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-04-17 22:51:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 536. [2020-04-17 22:51:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 536 states. [2020-04-17 22:51:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1688 transitions. [2020-04-17 22:51:06,873 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1688 transitions. Word has length 15 [2020-04-17 22:51:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:06,874 INFO L479 AbstractCegarLoop]: Abstraction has 536 states and 1688 transitions. [2020-04-17 22:51:06,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1688 transitions. [2020-04-17 22:51:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:51:06,875 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:06,876 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:06,876 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:06,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:06,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1734594488, now seen corresponding path program 1 times [2020-04-17 22:51:06,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:06,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119293424] [2020-04-17 22:51:06,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:06,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119293424] [2020-04-17 22:51:06,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:06,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:06,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808874198] [2020-04-17 22:51:06,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:06,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:06,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:06,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:06,939 INFO L87 Difference]: Start difference. First operand 536 states and 1688 transitions. Second operand 5 states. [2020-04-17 22:51:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:07,067 INFO L93 Difference]: Finished difference Result 736 states and 2123 transitions. [2020-04-17 22:51:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:07,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-04-17 22:51:07,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:07,072 INFO L225 Difference]: With dead ends: 736 [2020-04-17 22:51:07,073 INFO L226 Difference]: Without dead ends: 728 [2020-04-17 22:51:07,073 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-04-17 22:51:07,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 549. [2020-04-17 22:51:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-04-17 22:51:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1684 transitions. [2020-04-17 22:51:07,094 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1684 transitions. Word has length 17 [2020-04-17 22:51:07,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:07,095 INFO L479 AbstractCegarLoop]: Abstraction has 549 states and 1684 transitions. [2020-04-17 22:51:07,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1684 transitions. [2020-04-17 22:51:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 22:51:07,096 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:07,096 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:07,097 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2065233823, now seen corresponding path program 1 times [2020-04-17 22:51:07,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:07,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799384818] [2020-04-17 22:51:07,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:07,149 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:51:07,149 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:51:07,150 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:51:07,150 WARN L363 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:51:07,151 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-04-17 22:51:07,166 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,167 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,167 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,167 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,167 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,167 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,167 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,168 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,168 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,168 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,168 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,168 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,168 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,169 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,169 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,169 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,169 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,169 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,169 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,169 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,170 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,170 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,170 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,170 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,170 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,170 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,171 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,171 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,171 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,171 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,171 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,171 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,172 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,172 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,172 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,172 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,172 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,172 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,173 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,173 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,173 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,173 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,173 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,173 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,173 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,174 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,174 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,174 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,174 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,174 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,174 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,175 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,175 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,175 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,175 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,175 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,175 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,175 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,176 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,176 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,176 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,176 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,176 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,176 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,176 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,177 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,177 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,177 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,177 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,177 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,178 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,178 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,178 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,180 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,181 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,181 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,181 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,181 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,182 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,182 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,183 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,183 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,183 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,185 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,186 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,186 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,186 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,186 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,188 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,189 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,189 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,189 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,189 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,189 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,191 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,192 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,192 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,192 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,192 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,192 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,194 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,195 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,195 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,195 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,195 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,195 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,198 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,199 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,199 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,199 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,199 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,199 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:07,201 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-04-17 22:51:07,202 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:51:07,202 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:51:07,202 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:51:07,202 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:51:07,202 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:51:07,202 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:51:07,202 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:51:07,202 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:51:07,204 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 106 transitions, 276 flow [2020-04-17 22:51:07,204 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 118 places, 106 transitions, 276 flow [2020-04-17 22:51:07,220 INFO L129 PetriNetUnfolder]: 7/131 cut-off events. [2020-04-17 22:51:07,220 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-04-17 22:51:07,221 INFO L80 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 131 events. 7/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 151. Up to 10 conditions per place. [2020-04-17 22:51:07,224 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 118 places, 106 transitions, 276 flow [2020-04-17 22:51:07,238 INFO L129 PetriNetUnfolder]: 7/131 cut-off events. [2020-04-17 22:51:07,238 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-04-17 22:51:07,239 INFO L80 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 131 events. 7/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 151. Up to 10 conditions per place. [2020-04-17 22:51:07,242 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1756 [2020-04-17 22:51:07,242 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:51:09,490 WARN L192 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-04-17 22:51:09,675 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-04-17 22:51:09,773 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2033 [2020-04-17 22:51:09,773 INFO L214 etLargeBlockEncoding]: Total number of compositions: 86 [2020-04-17 22:51:09,774 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 33 transitions, 130 flow [2020-04-17 22:51:09,884 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2060 states. [2020-04-17 22:51:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states. [2020-04-17 22:51:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:51:09,885 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:09,885 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:51:09,886 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:09,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:09,886 INFO L82 PathProgramCache]: Analyzing trace with hash 779528, now seen corresponding path program 1 times [2020-04-17 22:51:09,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:09,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387220482] [2020-04-17 22:51:09,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:09,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387220482] [2020-04-17 22:51:09,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:09,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:51:09,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861070622] [2020-04-17 22:51:09,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:51:09,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:09,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:51:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:09,905 INFO L87 Difference]: Start difference. First operand 2060 states. Second operand 3 states. [2020-04-17 22:51:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:10,000 INFO L93 Difference]: Finished difference Result 1889 states and 7217 transitions. [2020-04-17 22:51:10,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:51:10,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:51:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:10,017 INFO L225 Difference]: With dead ends: 1889 [2020-04-17 22:51:10,017 INFO L226 Difference]: Without dead ends: 1767 [2020-04-17 22:51:10,017 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2020-04-17 22:51:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1767. [2020-04-17 22:51:10,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1767 states. [2020-04-17 22:51:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 6690 transitions. [2020-04-17 22:51:10,110 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 6690 transitions. Word has length 3 [2020-04-17 22:51:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:10,110 INFO L479 AbstractCegarLoop]: Abstraction has 1767 states and 6690 transitions. [2020-04-17 22:51:10,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:51:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 6690 transitions. [2020-04-17 22:51:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:51:10,111 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:10,111 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:10,112 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash -666106918, now seen corresponding path program 1 times [2020-04-17 22:51:10,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:10,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709178161] [2020-04-17 22:51:10,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:10,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709178161] [2020-04-17 22:51:10,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:10,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:10,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161071148] [2020-04-17 22:51:10,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:10,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:10,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:10,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:10,179 INFO L87 Difference]: Start difference. First operand 1767 states and 6690 transitions. Second operand 5 states. [2020-04-17 22:51:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:10,309 INFO L93 Difference]: Finished difference Result 2905 states and 10138 transitions. [2020-04-17 22:51:10,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:10,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 22:51:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:10,332 INFO L225 Difference]: With dead ends: 2905 [2020-04-17 22:51:10,333 INFO L226 Difference]: Without dead ends: 2899 [2020-04-17 22:51:10,333 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:10,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2020-04-17 22:51:10,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 1966. [2020-04-17 22:51:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1966 states. [2020-04-17 22:51:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7503 transitions. [2020-04-17 22:51:10,444 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7503 transitions. Word has length 9 [2020-04-17 22:51:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:10,444 INFO L479 AbstractCegarLoop]: Abstraction has 1966 states and 7503 transitions. [2020-04-17 22:51:10,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:10,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7503 transitions. [2020-04-17 22:51:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:51:10,445 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:10,445 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:10,445 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1766896000, now seen corresponding path program 1 times [2020-04-17 22:51:10,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:10,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212763204] [2020-04-17 22:51:10,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:10,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212763204] [2020-04-17 22:51:10,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:10,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:10,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493802471] [2020-04-17 22:51:10,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:10,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:10,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:10,481 INFO L87 Difference]: Start difference. First operand 1966 states and 7503 transitions. Second operand 5 states. [2020-04-17 22:51:10,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:10,587 INFO L93 Difference]: Finished difference Result 3204 states and 11312 transitions. [2020-04-17 22:51:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:10,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-17 22:51:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:10,615 INFO L225 Difference]: With dead ends: 3204 [2020-04-17 22:51:10,615 INFO L226 Difference]: Without dead ends: 3194 [2020-04-17 22:51:10,615 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-04-17 22:51:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 2200. [2020-04-17 22:51:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2200 states. [2020-04-17 22:51:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 8453 transitions. [2020-04-17 22:51:10,729 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 8453 transitions. Word has length 13 [2020-04-17 22:51:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:10,730 INFO L479 AbstractCegarLoop]: Abstraction has 2200 states and 8453 transitions. [2020-04-17 22:51:10,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 8453 transitions. [2020-04-17 22:51:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:10,730 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:10,731 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:10,731 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1022394712, now seen corresponding path program 1 times [2020-04-17 22:51:10,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:10,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941313790] [2020-04-17 22:51:10,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:10,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941313790] [2020-04-17 22:51:10,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112108137] [2020-04-17 22:51:10,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:10,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:10,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:10,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:10,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:10,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782776136] [2020-04-17 22:51:10,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:10,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:10,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:10,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:10,937 INFO L87 Difference]: Start difference. First operand 2200 states and 8453 transitions. Second operand 12 states. [2020-04-17 22:51:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:11,287 INFO L93 Difference]: Finished difference Result 4556 states and 14911 transitions. [2020-04-17 22:51:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:11,287 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 22:51:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:11,326 INFO L225 Difference]: With dead ends: 4556 [2020-04-17 22:51:11,326 INFO L226 Difference]: Without dead ends: 4546 [2020-04-17 22:51:11,327 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:51:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2020-04-17 22:51:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 2157. [2020-04-17 22:51:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2157 states. [2020-04-17 22:51:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 8278 transitions. [2020-04-17 22:51:11,449 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 8278 transitions. Word has length 15 [2020-04-17 22:51:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:11,450 INFO L479 AbstractCegarLoop]: Abstraction has 2157 states and 8278 transitions. [2020-04-17 22:51:11,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 8278 transitions. [2020-04-17 22:51:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:11,451 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:11,451 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:11,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:11,655 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:11,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1474969304, now seen corresponding path program 2 times [2020-04-17 22:51:11,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:11,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662196321] [2020-04-17 22:51:11,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:11,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662196321] [2020-04-17 22:51:11,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:11,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:11,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663680414] [2020-04-17 22:51:11,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:11,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:11,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:11,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:11,724 INFO L87 Difference]: Start difference. First operand 2157 states and 8278 transitions. Second operand 7 states. [2020-04-17 22:51:12,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:12,020 INFO L93 Difference]: Finished difference Result 4612 states and 15111 transitions. [2020-04-17 22:51:12,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:12,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-04-17 22:51:12,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:12,040 INFO L225 Difference]: With dead ends: 4612 [2020-04-17 22:51:12,040 INFO L226 Difference]: Without dead ends: 4601 [2020-04-17 22:51:12,041 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:51:12,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2020-04-17 22:51:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 2035. [2020-04-17 22:51:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2035 states. [2020-04-17 22:51:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 7845 transitions. [2020-04-17 22:51:12,149 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 7845 transitions. Word has length 15 [2020-04-17 22:51:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:12,149 INFO L479 AbstractCegarLoop]: Abstraction has 2035 states and 7845 transitions. [2020-04-17 22:51:12,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 7845 transitions. [2020-04-17 22:51:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:51:12,150 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:12,151 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:12,151 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:12,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:12,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1278978660, now seen corresponding path program 1 times [2020-04-17 22:51:12,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:12,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871600971] [2020-04-17 22:51:12,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:12,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871600971] [2020-04-17 22:51:12,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:12,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:12,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740436511] [2020-04-17 22:51:12,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:12,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:12,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:12,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:12,198 INFO L87 Difference]: Start difference. First operand 2035 states and 7845 transitions. Second operand 5 states. [2020-04-17 22:51:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:12,294 INFO L93 Difference]: Finished difference Result 3265 states and 11681 transitions. [2020-04-17 22:51:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:12,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-04-17 22:51:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:12,308 INFO L225 Difference]: With dead ends: 3265 [2020-04-17 22:51:12,308 INFO L226 Difference]: Without dead ends: 3250 [2020-04-17 22:51:12,309 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-04-17 22:51:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2281. [2020-04-17 22:51:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2281 states. [2020-04-17 22:51:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 8755 transitions. [2020-04-17 22:51:12,408 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 8755 transitions. Word has length 17 [2020-04-17 22:51:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:12,409 INFO L479 AbstractCegarLoop]: Abstraction has 2281 states and 8755 transitions. [2020-04-17 22:51:12,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 8755 transitions. [2020-04-17 22:51:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:12,410 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:12,410 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:12,411 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1455436228, now seen corresponding path program 1 times [2020-04-17 22:51:12,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:12,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113685743] [2020-04-17 22:51:12,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:51:12,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113685743] [2020-04-17 22:51:12,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854371790] [2020-04-17 22:51:12,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:51:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:12,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:12,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:51:12,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:12,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:12,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101241772] [2020-04-17 22:51:12,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:12,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:12,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:12,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:12,732 INFO L87 Difference]: Start difference. First operand 2281 states and 8755 transitions. Second operand 12 states. [2020-04-17 22:51:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:13,151 INFO L93 Difference]: Finished difference Result 4825 states and 15986 transitions. [2020-04-17 22:51:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:13,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:51:13,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:13,168 INFO L225 Difference]: With dead ends: 4825 [2020-04-17 22:51:13,168 INFO L226 Difference]: Without dead ends: 4813 [2020-04-17 22:51:13,169 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:51:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4813 states. [2020-04-17 22:51:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4813 to 2305. [2020-04-17 22:51:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2305 states. [2020-04-17 22:51:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 8815 transitions. [2020-04-17 22:51:13,291 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 8815 transitions. Word has length 19 [2020-04-17 22:51:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:13,291 INFO L479 AbstractCegarLoop]: Abstraction has 2305 states and 8815 transitions. [2020-04-17 22:51:13,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 8815 transitions. [2020-04-17 22:51:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:13,293 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:13,293 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:13,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:13,498 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:13,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:13,498 INFO L82 PathProgramCache]: Analyzing trace with hash -979473248, now seen corresponding path program 1 times [2020-04-17 22:51:13,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:13,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328992894] [2020-04-17 22:51:13,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:13,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328992894] [2020-04-17 22:51:13,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394330446] [2020-04-17 22:51:13,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:13,632 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:13,634 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:13,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:13,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:13,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962000961] [2020-04-17 22:51:13,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:13,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:13,754 INFO L87 Difference]: Start difference. First operand 2305 states and 8815 transitions. Second operand 12 states. [2020-04-17 22:51:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:14,239 INFO L93 Difference]: Finished difference Result 4942 states and 16410 transitions. [2020-04-17 22:51:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:14,240 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:51:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:14,255 INFO L225 Difference]: With dead ends: 4942 [2020-04-17 22:51:14,255 INFO L226 Difference]: Without dead ends: 4925 [2020-04-17 22:51:14,255 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:51:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2020-04-17 22:51:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 2299. [2020-04-17 22:51:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-04-17 22:51:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 8782 transitions. [2020-04-17 22:51:14,509 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 8782 transitions. Word has length 19 [2020-04-17 22:51:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:14,509 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 8782 transitions. [2020-04-17 22:51:14,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 8782 transitions. [2020-04-17 22:51:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:14,511 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:14,511 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:14,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:14,712 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash -737855584, now seen corresponding path program 2 times [2020-04-17 22:51:14,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:14,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912008529] [2020-04-17 22:51:14,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:14,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912008529] [2020-04-17 22:51:14,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:14,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:14,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69617183] [2020-04-17 22:51:14,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:14,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:14,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:14,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:14,788 INFO L87 Difference]: Start difference. First operand 2299 states and 8782 transitions. Second operand 7 states. [2020-04-17 22:51:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:15,078 INFO L93 Difference]: Finished difference Result 4934 states and 16393 transitions. [2020-04-17 22:51:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:15,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:51:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:15,092 INFO L225 Difference]: With dead ends: 4934 [2020-04-17 22:51:15,093 INFO L226 Difference]: Without dead ends: 4917 [2020-04-17 22:51:15,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:51:15,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4917 states. [2020-04-17 22:51:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4917 to 2216. [2020-04-17 22:51:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2216 states. [2020-04-17 22:51:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 8477 transitions. [2020-04-17 22:51:15,195 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 8477 transitions. Word has length 19 [2020-04-17 22:51:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:15,196 INFO L479 AbstractCegarLoop]: Abstraction has 2216 states and 8477 transitions. [2020-04-17 22:51:15,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 8477 transitions. [2020-04-17 22:51:15,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:15,197 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:15,197 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:15,197 INFO L427 AbstractCegarLoop]: === Iteration 10 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash -737840828, now seen corresponding path program 2 times [2020-04-17 22:51:15,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:15,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350615107] [2020-04-17 22:51:15,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:15,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350615107] [2020-04-17 22:51:15,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:15,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:15,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015881818] [2020-04-17 22:51:15,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:15,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:15,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:15,250 INFO L87 Difference]: Start difference. First operand 2216 states and 8477 transitions. Second operand 7 states. [2020-04-17 22:51:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:15,545 INFO L93 Difference]: Finished difference Result 4774 states and 15828 transitions. [2020-04-17 22:51:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:15,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:51:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:15,558 INFO L225 Difference]: With dead ends: 4774 [2020-04-17 22:51:15,559 INFO L226 Difference]: Without dead ends: 4757 [2020-04-17 22:51:15,559 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:51:15,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4757 states. [2020-04-17 22:51:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4757 to 2150. [2020-04-17 22:51:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2150 states. [2020-04-17 22:51:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 8243 transitions. [2020-04-17 22:51:15,653 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 8243 transitions. Word has length 19 [2020-04-17 22:51:15,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:15,653 INFO L479 AbstractCegarLoop]: Abstraction has 2150 states and 8243 transitions. [2020-04-17 22:51:15,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:15,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 8243 transitions. [2020-04-17 22:51:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:15,655 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:15,655 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:15,655 INFO L427 AbstractCegarLoop]: === Iteration 11 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:15,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1726751032, now seen corresponding path program 1 times [2020-04-17 22:51:15,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:15,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098834793] [2020-04-17 22:51:15,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:15,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098834793] [2020-04-17 22:51:15,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887782560] [2020-04-17 22:51:15,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:15,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:15,827 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:15,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:15,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:15,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828754670] [2020-04-17 22:51:15,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:15,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:15,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:15,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:15,932 INFO L87 Difference]: Start difference. First operand 2150 states and 8243 transitions. Second operand 16 states. [2020-04-17 22:51:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:16,818 INFO L93 Difference]: Finished difference Result 6025 states and 18746 transitions. [2020-04-17 22:51:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:16,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:16,828 INFO L225 Difference]: With dead ends: 6025 [2020-04-17 22:51:16,829 INFO L226 Difference]: Without dead ends: 6017 [2020-04-17 22:51:16,829 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2020-04-17 22:51:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 2117. [2020-04-17 22:51:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2117 states. [2020-04-17 22:51:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 8106 transitions. [2020-04-17 22:51:16,920 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 8106 transitions. Word has length 21 [2020-04-17 22:51:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:16,920 INFO L479 AbstractCegarLoop]: Abstraction has 2117 states and 8106 transitions. [2020-04-17 22:51:16,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 8106 transitions. [2020-04-17 22:51:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:16,922 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:16,922 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:17,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:17,130 INFO L427 AbstractCegarLoop]: === Iteration 12 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1485133368, now seen corresponding path program 2 times [2020-04-17 22:51:17,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:17,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131262708] [2020-04-17 22:51:17,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:51:17,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131262708] [2020-04-17 22:51:17,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954848267] [2020-04-17 22:51:17,211 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:17,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:51:17,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:17,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:17,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:51:17,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:17,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:17,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519945807] [2020-04-17 22:51:17,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:17,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:17,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:17,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:17,422 INFO L87 Difference]: Start difference. First operand 2117 states and 8106 transitions. Second operand 16 states. [2020-04-17 22:51:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:18,250 INFO L93 Difference]: Finished difference Result 5914 states and 18384 transitions. [2020-04-17 22:51:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:18,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:18,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:18,260 INFO L225 Difference]: With dead ends: 5914 [2020-04-17 22:51:18,260 INFO L226 Difference]: Without dead ends: 5903 [2020-04-17 22:51:18,261 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5903 states. [2020-04-17 22:51:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5903 to 2085. [2020-04-17 22:51:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2085 states. [2020-04-17 22:51:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 7975 transitions. [2020-04-17 22:51:18,424 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 7975 transitions. Word has length 21 [2020-04-17 22:51:18,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:18,424 INFO L479 AbstractCegarLoop]: Abstraction has 2085 states and 7975 transitions. [2020-04-17 22:51:18,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:18,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 7975 transitions. [2020-04-17 22:51:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:18,431 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:18,431 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:18,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:18,636 INFO L427 AbstractCegarLoop]: === Iteration 13 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:18,637 INFO L82 PathProgramCache]: Analyzing trace with hash -268549816, now seen corresponding path program 3 times [2020-04-17 22:51:18,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:18,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076170057] [2020-04-17 22:51:18,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:18,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076170057] [2020-04-17 22:51:18,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683878703] [2020-04-17 22:51:18,735 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:18,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:51:18,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:18,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:18,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:18,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:18,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:18,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108668723] [2020-04-17 22:51:18,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:18,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:18,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:18,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:18,961 INFO L87 Difference]: Start difference. First operand 2085 states and 7975 transitions. Second operand 16 states. [2020-04-17 22:51:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:19,750 INFO L93 Difference]: Finished difference Result 5907 states and 18375 transitions. [2020-04-17 22:51:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:19,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:19,760 INFO L225 Difference]: With dead ends: 5907 [2020-04-17 22:51:19,760 INFO L226 Difference]: Without dead ends: 5899 [2020-04-17 22:51:19,761 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5899 states. [2020-04-17 22:51:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5899 to 2008. [2020-04-17 22:51:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2008 states. [2020-04-17 22:51:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7698 transitions. [2020-04-17 22:51:19,842 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7698 transitions. Word has length 21 [2020-04-17 22:51:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:19,843 INFO L479 AbstractCegarLoop]: Abstraction has 2008 states and 7698 transitions. [2020-04-17 22:51:19,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7698 transitions. [2020-04-17 22:51:19,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:19,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:19,845 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:20,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:20,050 INFO L427 AbstractCegarLoop]: === Iteration 14 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:20,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash -675948728, now seen corresponding path program 4 times [2020-04-17 22:51:20,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:20,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661655039] [2020-04-17 22:51:20,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:20,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661655039] [2020-04-17 22:51:20,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512570843] [2020-04-17 22:51:20,121 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:20,208 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:51:20,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:20,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:20,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:20,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:20,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:20,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184156963] [2020-04-17 22:51:20,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:20,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:20,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:20,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:20,334 INFO L87 Difference]: Start difference. First operand 2008 states and 7698 transitions. Second operand 16 states. [2020-04-17 22:51:21,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:21,291 INFO L93 Difference]: Finished difference Result 5835 states and 18155 transitions. [2020-04-17 22:51:21,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:21,291 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:21,306 INFO L225 Difference]: With dead ends: 5835 [2020-04-17 22:51:21,306 INFO L226 Difference]: Without dead ends: 5824 [2020-04-17 22:51:21,307 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5824 states. [2020-04-17 22:51:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5824 to 1976. [2020-04-17 22:51:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1976 states. [2020-04-17 22:51:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 7567 transitions. [2020-04-17 22:51:21,398 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 7567 transitions. Word has length 21 [2020-04-17 22:51:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:21,398 INFO L479 AbstractCegarLoop]: Abstraction has 1976 states and 7567 transitions. [2020-04-17 22:51:21,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 7567 transitions. [2020-04-17 22:51:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:21,402 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:21,402 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:21,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:21,616 INFO L427 AbstractCegarLoop]: === Iteration 15 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash -409607608, now seen corresponding path program 5 times [2020-04-17 22:51:21,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:21,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217903003] [2020-04-17 22:51:21,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:21,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217903003] [2020-04-17 22:51:21,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:21,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:51:21,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439906819] [2020-04-17 22:51:21,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:51:21,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:21,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:51:21,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:51:21,690 INFO L87 Difference]: Start difference. First operand 1976 states and 7567 transitions. Second operand 9 states. [2020-04-17 22:51:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:22,376 INFO L93 Difference]: Finished difference Result 5820 states and 18126 transitions. [2020-04-17 22:51:22,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:22,377 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:51:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:22,389 INFO L225 Difference]: With dead ends: 5820 [2020-04-17 22:51:22,389 INFO L226 Difference]: Without dead ends: 5812 [2020-04-17 22:51:22,390 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:51:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2020-04-17 22:51:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 1907. [2020-04-17 22:51:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1907 states. [2020-04-17 22:51:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 7310 transitions. [2020-04-17 22:51:22,460 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 7310 transitions. Word has length 21 [2020-04-17 22:51:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:22,460 INFO L479 AbstractCegarLoop]: Abstraction has 1907 states and 7310 transitions. [2020-04-17 22:51:22,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:51:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 7310 transitions. [2020-04-17 22:51:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:22,462 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:22,462 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:22,462 INFO L427 AbstractCegarLoop]: === Iteration 16 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:22,462 INFO L82 PathProgramCache]: Analyzing trace with hash -395441848, now seen corresponding path program 6 times [2020-04-17 22:51:22,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:22,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501472127] [2020-04-17 22:51:22,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:22,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501472127] [2020-04-17 22:51:22,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:22,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:51:22,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390713121] [2020-04-17 22:51:22,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:51:22,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:22,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:51:22,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:51:22,523 INFO L87 Difference]: Start difference. First operand 1907 states and 7310 transitions. Second operand 9 states. [2020-04-17 22:51:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:23,297 INFO L93 Difference]: Finished difference Result 5717 states and 17784 transitions. [2020-04-17 22:51:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:23,302 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:51:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:23,313 INFO L225 Difference]: With dead ends: 5717 [2020-04-17 22:51:23,313 INFO L226 Difference]: Without dead ends: 5705 [2020-04-17 22:51:23,314 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:51:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2020-04-17 22:51:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 1800. [2020-04-17 22:51:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-04-17 22:51:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 6961 transitions. [2020-04-17 22:51:23,400 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 6961 transitions. Word has length 21 [2020-04-17 22:51:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:23,401 INFO L479 AbstractCegarLoop]: Abstraction has 1800 states and 6961 transitions. [2020-04-17 22:51:23,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:51:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 6961 transitions. [2020-04-17 22:51:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:23,403 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:23,403 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:23,403 INFO L427 AbstractCegarLoop]: === Iteration 17 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:23,403 INFO L82 PathProgramCache]: Analyzing trace with hash -334654421, now seen corresponding path program 1 times [2020-04-17 22:51:23,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:23,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898509660] [2020-04-17 22:51:23,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:51:23,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898509660] [2020-04-17 22:51:23,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:23,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:23,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668127578] [2020-04-17 22:51:23,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:23,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:23,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:23,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:23,461 INFO L87 Difference]: Start difference. First operand 1800 states and 6961 transitions. Second operand 5 states. [2020-04-17 22:51:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:23,633 INFO L93 Difference]: Finished difference Result 2762 states and 9976 transitions. [2020-04-17 22:51:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:23,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-04-17 22:51:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:23,643 INFO L225 Difference]: With dead ends: 2762 [2020-04-17 22:51:23,644 INFO L226 Difference]: Without dead ends: 2746 [2020-04-17 22:51:23,644 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2020-04-17 22:51:23,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1965. [2020-04-17 22:51:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1965 states. [2020-04-17 22:51:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 7429 transitions. [2020-04-17 22:51:23,716 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 7429 transitions. Word has length 21 [2020-04-17 22:51:23,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:23,716 INFO L479 AbstractCegarLoop]: Abstraction has 1965 states and 7429 transitions. [2020-04-17 22:51:23,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:23,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 7429 transitions. [2020-04-17 22:51:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 22:51:23,719 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:23,719 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:23,720 INFO L427 AbstractCegarLoop]: === Iteration 18 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1788555247, now seen corresponding path program 1 times [2020-04-17 22:51:23,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:23,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045013561] [2020-04-17 22:51:23,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:23,783 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:51:23,783 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:51:23,783 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:51:23,784 WARN L363 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:51:23,785 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-04-17 22:51:23,802 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,803 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,803 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,803 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,803 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,803 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,803 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,804 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,805 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,805 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,805 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,806 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,806 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,806 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,806 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,806 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,806 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,806 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,807 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,807 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,807 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,807 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,807 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,807 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,807 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,808 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,808 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,808 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,808 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,808 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,808 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,808 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,809 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,809 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,809 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,809 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,809 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,809 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,809 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,810 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,810 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,810 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,810 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,810 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,810 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,811 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,811 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,811 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,811 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,811 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,811 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,811 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,812 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,812 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,812 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,812 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,812 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,812 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,812 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,813 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,813 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,813 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,813 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,813 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,813 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,814 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,814 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,814 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,814 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,814 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,814 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,814 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,814 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,815 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,815 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,815 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,815 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,815 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,815 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,816 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,816 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,816 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,816 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,816 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,816 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,817 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,817 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,818 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,818 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,818 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,820 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,821 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,821 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,821 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,821 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,823 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,824 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,824 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,824 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,824 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,826 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,827 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,827 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,827 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,827 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,829 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,830 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,830 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,830 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,830 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,832 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,833 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,833 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,833 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,833 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,833 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,835 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,836 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,836 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,836 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,836 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,836 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,838 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,839 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,839 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,839 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,839 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,839 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,841 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,842 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,842 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,842 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,842 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,842 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,843 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,844 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,844 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,844 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,844 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,844 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:23,845 INFO L251 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-04-17 22:51:23,846 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:51:23,846 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:51:23,846 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:51:23,846 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:51:23,846 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:51:23,846 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:51:23,846 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:51:23,847 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:51:23,848 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 122 transitions, 334 flow [2020-04-17 22:51:23,848 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 137 places, 122 transitions, 334 flow [2020-04-17 22:51:23,870 INFO L129 PetriNetUnfolder]: 8/152 cut-off events. [2020-04-17 22:51:23,871 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2020-04-17 22:51:23,872 INFO L80 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 152 events. 8/152 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 251 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 179. Up to 12 conditions per place. [2020-04-17 22:51:23,876 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 137 places, 122 transitions, 334 flow [2020-04-17 22:51:23,897 INFO L129 PetriNetUnfolder]: 8/152 cut-off events. [2020-04-17 22:51:23,898 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2020-04-17 22:51:23,899 INFO L80 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 152 events. 8/152 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 251 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 179. Up to 12 conditions per place. [2020-04-17 22:51:23,903 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2264 [2020-04-17 22:51:23,903 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:51:26,054 WARN L192 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-04-17 22:51:26,350 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-04-17 22:51:26,610 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-04-17 22:51:26,692 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2999 [2020-04-17 22:51:26,692 INFO L214 etLargeBlockEncoding]: Total number of compositions: 104 [2020-04-17 22:51:26,693 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 39 transitions, 168 flow [2020-04-17 22:51:27,169 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6191 states. [2020-04-17 22:51:27,170 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states. [2020-04-17 22:51:27,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:51:27,170 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:27,170 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:51:27,170 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:27,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:27,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1026170, now seen corresponding path program 1 times [2020-04-17 22:51:27,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:27,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718241493] [2020-04-17 22:51:27,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:27,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718241493] [2020-04-17 22:51:27,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:27,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:51:27,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967769362] [2020-04-17 22:51:27,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:51:27,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:27,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:51:27,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:27,212 INFO L87 Difference]: Start difference. First operand 6191 states. Second operand 3 states. [2020-04-17 22:51:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:27,292 INFO L93 Difference]: Finished difference Result 5844 states and 26316 transitions. [2020-04-17 22:51:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:51:27,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:51:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:27,312 INFO L225 Difference]: With dead ends: 5844 [2020-04-17 22:51:27,312 INFO L226 Difference]: Without dead ends: 5479 [2020-04-17 22:51:27,314 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5479 states. [2020-04-17 22:51:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5479 to 5479. [2020-04-17 22:51:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5479 states. [2020-04-17 22:51:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 24493 transitions. [2020-04-17 22:51:27,474 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 24493 transitions. Word has length 3 [2020-04-17 22:51:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:27,474 INFO L479 AbstractCegarLoop]: Abstraction has 5479 states and 24493 transitions. [2020-04-17 22:51:27,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:51:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 24493 transitions. [2020-04-17 22:51:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:51:27,474 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:27,475 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:27,475 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:27,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1344335463, now seen corresponding path program 1 times [2020-04-17 22:51:27,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:27,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699190388] [2020-04-17 22:51:27,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:27,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699190388] [2020-04-17 22:51:27,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:27,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:27,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640768881] [2020-04-17 22:51:27,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:27,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:27,513 INFO L87 Difference]: Start difference. First operand 5479 states and 24493 transitions. Second operand 5 states. [2020-04-17 22:51:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:27,795 INFO L93 Difference]: Finished difference Result 9673 states and 40333 transitions. [2020-04-17 22:51:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:27,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 22:51:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:27,826 INFO L225 Difference]: With dead ends: 9673 [2020-04-17 22:51:27,827 INFO L226 Difference]: Without dead ends: 9666 [2020-04-17 22:51:27,828 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2020-04-17 22:51:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 6331. [2020-04-17 22:51:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6331 states. [2020-04-17 22:51:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 28544 transitions. [2020-04-17 22:51:28,052 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 28544 transitions. Word has length 9 [2020-04-17 22:51:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:28,052 INFO L479 AbstractCegarLoop]: Abstraction has 6331 states and 28544 transitions. [2020-04-17 22:51:28,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 28544 transitions. [2020-04-17 22:51:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:51:28,053 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:28,053 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:28,053 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:28,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1513378118, now seen corresponding path program 1 times [2020-04-17 22:51:28,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:28,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350701539] [2020-04-17 22:51:28,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:28,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350701539] [2020-04-17 22:51:28,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:28,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:28,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652721301] [2020-04-17 22:51:28,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:28,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:28,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:28,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:28,086 INFO L87 Difference]: Start difference. First operand 6331 states and 28544 transitions. Second operand 5 states. [2020-04-17 22:51:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:28,244 INFO L93 Difference]: Finished difference Result 11081 states and 46826 transitions. [2020-04-17 22:51:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:28,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-17 22:51:28,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:28,281 INFO L225 Difference]: With dead ends: 11081 [2020-04-17 22:51:28,281 INFO L226 Difference]: Without dead ends: 11068 [2020-04-17 22:51:28,282 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11068 states. [2020-04-17 22:51:28,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11068 to 7391. [2020-04-17 22:51:28,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7391 states. [2020-04-17 22:51:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7391 states to 7391 states and 33694 transitions. [2020-04-17 22:51:28,597 INFO L78 Accepts]: Start accepts. Automaton has 7391 states and 33694 transitions. Word has length 13 [2020-04-17 22:51:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:28,597 INFO L479 AbstractCegarLoop]: Abstraction has 7391 states and 33694 transitions. [2020-04-17 22:51:28,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 7391 states and 33694 transitions. [2020-04-17 22:51:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:28,598 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:28,598 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:28,598 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:28,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1678648171, now seen corresponding path program 1 times [2020-04-17 22:51:28,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:28,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799740680] [2020-04-17 22:51:28,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:28,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799740680] [2020-04-17 22:51:28,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272172495] [2020-04-17 22:51:28,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:28,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:28,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:28,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:28,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:28,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010662510] [2020-04-17 22:51:28,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:28,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:28,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:28,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:28,788 INFO L87 Difference]: Start difference. First operand 7391 states and 33694 transitions. Second operand 12 states. [2020-04-17 22:51:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:29,687 INFO L93 Difference]: Finished difference Result 16749 states and 66010 transitions. [2020-04-17 22:51:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:29,688 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 22:51:29,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:29,725 INFO L225 Difference]: With dead ends: 16749 [2020-04-17 22:51:29,725 INFO L226 Difference]: Without dead ends: 16736 [2020-04-17 22:51:29,726 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:51:29,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16736 states. [2020-04-17 22:51:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16736 to 7303. [2020-04-17 22:51:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7303 states. [2020-04-17 22:51:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 33260 transitions. [2020-04-17 22:51:30,009 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 33260 transitions. Word has length 15 [2020-04-17 22:51:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:30,009 INFO L479 AbstractCegarLoop]: Abstraction has 7303 states and 33260 transitions. [2020-04-17 22:51:30,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 33260 transitions. [2020-04-17 22:51:30,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:30,010 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:30,010 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:30,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:30,211 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:30,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1637555113, now seen corresponding path program 2 times [2020-04-17 22:51:30,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:30,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949157676] [2020-04-17 22:51:30,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:30,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949157676] [2020-04-17 22:51:30,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:30,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:30,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084388700] [2020-04-17 22:51:30,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:30,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:30,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:30,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:30,254 INFO L87 Difference]: Start difference. First operand 7303 states and 33260 transitions. Second operand 7 states. [2020-04-17 22:51:30,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:30,615 INFO L93 Difference]: Finished difference Result 17085 states and 67393 transitions. [2020-04-17 22:51:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:30,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-04-17 22:51:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:30,653 INFO L225 Difference]: With dead ends: 17085 [2020-04-17 22:51:30,654 INFO L226 Difference]: Without dead ends: 17071 [2020-04-17 22:51:30,654 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:51:30,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17071 states. [2020-04-17 22:51:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17071 to 7048. [2020-04-17 22:51:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7048 states. [2020-04-17 22:51:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 32136 transitions. [2020-04-17 22:51:30,922 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 32136 transitions. Word has length 15 [2020-04-17 22:51:30,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:30,922 INFO L479 AbstractCegarLoop]: Abstraction has 7048 states and 32136 transitions. [2020-04-17 22:51:30,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 32136 transitions. [2020-04-17 22:51:30,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:51:30,923 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:30,923 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:30,923 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:30,924 INFO L82 PathProgramCache]: Analyzing trace with hash -288445665, now seen corresponding path program 1 times [2020-04-17 22:51:30,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:30,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942538497] [2020-04-17 22:51:30,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:30,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942538497] [2020-04-17 22:51:30,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:30,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:30,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606313318] [2020-04-17 22:51:30,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:30,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:30,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:30,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:30,968 INFO L87 Difference]: Start difference. First operand 7048 states and 32136 transitions. Second operand 5 states. [2020-04-17 22:51:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:31,233 INFO L93 Difference]: Finished difference Result 12234 states and 52488 transitions. [2020-04-17 22:51:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:31,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-04-17 22:51:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:31,264 INFO L225 Difference]: With dead ends: 12234 [2020-04-17 22:51:31,264 INFO L226 Difference]: Without dead ends: 12212 [2020-04-17 22:51:31,264 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12212 states. [2020-04-17 22:51:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12212 to 8342. [2020-04-17 22:51:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8342 states. [2020-04-17 22:51:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8342 states to 8342 states and 38278 transitions. [2020-04-17 22:51:31,520 INFO L78 Accepts]: Start accepts. Automaton has 8342 states and 38278 transitions. Word has length 17 [2020-04-17 22:51:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:31,520 INFO L479 AbstractCegarLoop]: Abstraction has 8342 states and 38278 transitions. [2020-04-17 22:51:31,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 8342 states and 38278 transitions. [2020-04-17 22:51:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:31,521 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:31,521 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:31,522 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:31,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1255672082, now seen corresponding path program 1 times [2020-04-17 22:51:31,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:31,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942090731] [2020-04-17 22:51:31,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-04-17 22:51:31,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942090731] [2020-04-17 22:51:31,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666771759] [2020-04-17 22:51:31,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:51:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:31,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:31,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-04-17 22:51:31,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:31,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:31,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714273364] [2020-04-17 22:51:31,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:31,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:31,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:31,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:31,728 INFO L87 Difference]: Start difference. First operand 8342 states and 38278 transitions. Second operand 12 states. [2020-04-17 22:51:32,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:32,075 INFO L93 Difference]: Finished difference Result 19016 states and 76191 transitions. [2020-04-17 22:51:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:32,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:51:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:32,121 INFO L225 Difference]: With dead ends: 19016 [2020-04-17 22:51:32,121 INFO L226 Difference]: Without dead ends: 18998 [2020-04-17 22:51:32,122 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:51:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18998 states. [2020-04-17 22:51:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18998 to 8452. [2020-04-17 22:51:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8452 states. [2020-04-17 22:51:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8452 states to 8452 states and 38704 transitions. [2020-04-17 22:51:32,664 INFO L78 Accepts]: Start accepts. Automaton has 8452 states and 38704 transitions. Word has length 19 [2020-04-17 22:51:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:32,664 INFO L479 AbstractCegarLoop]: Abstraction has 8452 states and 38704 transitions. [2020-04-17 22:51:32,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 8452 states and 38704 transitions. [2020-04-17 22:51:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:32,665 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:32,665 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:32,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:32,869 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 402059005, now seen corresponding path program 1 times [2020-04-17 22:51:32,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:32,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706125196] [2020-04-17 22:51:32,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:32,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706125196] [2020-04-17 22:51:32,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669542508] [2020-04-17 22:51:32,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:33,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:33,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:33,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:33,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:33,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831080916] [2020-04-17 22:51:33,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:33,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:33,084 INFO L87 Difference]: Start difference. First operand 8452 states and 38704 transitions. Second operand 12 states. [2020-04-17 22:51:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:33,539 INFO L93 Difference]: Finished difference Result 19670 states and 79028 transitions. [2020-04-17 22:51:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:33,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:51:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:33,628 INFO L225 Difference]: With dead ends: 19670 [2020-04-17 22:51:33,629 INFO L226 Difference]: Without dead ends: 19645 [2020-04-17 22:51:33,629 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:51:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2020-04-17 22:51:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 8480. [2020-04-17 22:51:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8480 states. [2020-04-17 22:51:34,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8480 states to 8480 states and 38825 transitions. [2020-04-17 22:51:34,158 INFO L78 Accepts]: Start accepts. Automaton has 8480 states and 38825 transitions. Word has length 19 [2020-04-17 22:51:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:34,158 INFO L479 AbstractCegarLoop]: Abstraction has 8480 states and 38825 transitions. [2020-04-17 22:51:34,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:34,158 INFO L276 IsEmpty]: Start isEmpty. Operand 8480 states and 38825 transitions. [2020-04-17 22:51:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:34,160 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:34,160 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:34,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:34,373 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1976597437, now seen corresponding path program 2 times [2020-04-17 22:51:34,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:34,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654785802] [2020-04-17 22:51:34,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:34,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654785802] [2020-04-17 22:51:34,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:34,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:34,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956058126] [2020-04-17 22:51:34,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:34,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:34,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:34,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:34,421 INFO L87 Difference]: Start difference. First operand 8480 states and 38825 transitions. Second operand 7 states. [2020-04-17 22:51:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:34,786 INFO L93 Difference]: Finished difference Result 19852 states and 79846 transitions. [2020-04-17 22:51:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:34,787 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:51:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:34,829 INFO L225 Difference]: With dead ends: 19852 [2020-04-17 22:51:34,829 INFO L226 Difference]: Without dead ends: 19827 [2020-04-17 22:51:34,830 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:51:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19827 states. [2020-04-17 22:51:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19827 to 8379. [2020-04-17 22:51:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8379 states. [2020-04-17 22:51:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8379 states to 8379 states and 38406 transitions. [2020-04-17 22:51:35,367 INFO L78 Accepts]: Start accepts. Automaton has 8379 states and 38406 transitions. Word has length 19 [2020-04-17 22:51:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:35,367 INFO L479 AbstractCegarLoop]: Abstraction has 8379 states and 38406 transitions. [2020-04-17 22:51:35,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8379 states and 38406 transitions. [2020-04-17 22:51:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:35,369 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:35,369 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:35,369 INFO L427 AbstractCegarLoop]: === Iteration 10 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:35,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:35,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1976577008, now seen corresponding path program 2 times [2020-04-17 22:51:35,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:35,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598753754] [2020-04-17 22:51:35,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:35,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598753754] [2020-04-17 22:51:35,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:35,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:35,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297750791] [2020-04-17 22:51:35,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:35,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:35,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:35,418 INFO L87 Difference]: Start difference. First operand 8379 states and 38406 transitions. Second operand 7 states. [2020-04-17 22:51:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:35,854 INFO L93 Difference]: Finished difference Result 19555 states and 78564 transitions. [2020-04-17 22:51:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:35,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:51:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:35,895 INFO L225 Difference]: With dead ends: 19555 [2020-04-17 22:51:35,895 INFO L226 Difference]: Without dead ends: 19530 [2020-04-17 22:51:35,897 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:51:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19530 states. [2020-04-17 22:51:36,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19530 to 8317. [2020-04-17 22:51:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8317 states. [2020-04-17 22:51:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 38184 transitions. [2020-04-17 22:51:36,209 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 38184 transitions. Word has length 19 [2020-04-17 22:51:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:36,209 INFO L479 AbstractCegarLoop]: Abstraction has 8317 states and 38184 transitions. [2020-04-17 22:51:36,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 38184 transitions. [2020-04-17 22:51:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:36,210 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:36,210 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:36,211 INFO L427 AbstractCegarLoop]: === Iteration 11 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:36,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1389591796, now seen corresponding path program 1 times [2020-04-17 22:51:36,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:36,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194086129] [2020-04-17 22:51:36,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:36,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194086129] [2020-04-17 22:51:36,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384182721] [2020-04-17 22:51:36,269 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2020-04-17 22:51:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:36,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:36,357 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:51:36,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:36,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:36,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046037051] [2020-04-17 22:51:36,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:36,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:36,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:36,475 INFO L87 Difference]: Start difference. First operand 8317 states and 38184 transitions. Second operand 16 states. [2020-04-17 22:51:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:37,724 INFO L93 Difference]: Finished difference Result 26969 states and 101544 transitions. [2020-04-17 22:51:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:37,725 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:37,808 INFO L225 Difference]: With dead ends: 26969 [2020-04-17 22:51:37,809 INFO L226 Difference]: Without dead ends: 26957 [2020-04-17 22:51:37,810 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26957 states. [2020-04-17 22:51:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26957 to 8204. [2020-04-17 22:51:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8204 states. [2020-04-17 22:51:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 37628 transitions. [2020-04-17 22:51:38,225 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 37628 transitions. Word has length 21 [2020-04-17 22:51:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:38,225 INFO L479 AbstractCegarLoop]: Abstraction has 8204 states and 37628 transitions. [2020-04-17 22:51:38,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 37628 transitions. [2020-04-17 22:51:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:38,226 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:38,226 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:38,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:38,429 INFO L427 AbstractCegarLoop]: === Iteration 12 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:38,430 INFO L82 PathProgramCache]: Analyzing trace with hash 184946636, now seen corresponding path program 2 times [2020-04-17 22:51:38,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:38,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42693000] [2020-04-17 22:51:38,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-04-17 22:51:38,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42693000] [2020-04-17 22:51:38,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220870555] [2020-04-17 22:51:38,497 INFO L92 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 [2020-04-17 22:51:38,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:51:38,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:38,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:38,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-04-17 22:51:38,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:38,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:38,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443557216] [2020-04-17 22:51:38,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:38,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:38,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:38,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:38,672 INFO L87 Difference]: Start difference. First operand 8204 states and 37628 transitions. Second operand 16 states. [2020-04-17 22:51:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:39,595 INFO L93 Difference]: Finished difference Result 26661 states and 100277 transitions. [2020-04-17 22:51:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:39,595 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:39,652 INFO L225 Difference]: With dead ends: 26661 [2020-04-17 22:51:39,652 INFO L226 Difference]: Without dead ends: 26645 [2020-04-17 22:51:39,653 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26645 states. [2020-04-17 22:51:40,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26645 to 8091. [2020-04-17 22:51:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8091 states. [2020-04-17 22:51:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8091 states to 8091 states and 37076 transitions. [2020-04-17 22:51:40,918 INFO L78 Accepts]: Start accepts. Automaton has 8091 states and 37076 transitions. Word has length 21 [2020-04-17 22:51:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:40,918 INFO L479 AbstractCegarLoop]: Abstraction has 8091 states and 37076 transitions. [2020-04-17 22:51:40,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:40,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8091 states and 37076 transitions. [2020-04-17 22:51:40,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:40,919 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:40,919 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:41,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:41,120 INFO L427 AbstractCegarLoop]: === Iteration 13 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:41,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:41,121 INFO L82 PathProgramCache]: Analyzing trace with hash -231570740, now seen corresponding path program 3 times [2020-04-17 22:51:41,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:41,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381808439] [2020-04-17 22:51:41,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:41,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381808439] [2020-04-17 22:51:41,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040764830] [2020-04-17 22:51:41,207 INFO L92 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 [2020-04-17 22:51:41,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:51:41,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:41,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:41,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:41,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:41,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:41,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55300298] [2020-04-17 22:51:41,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:41,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:41,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:41,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:41,402 INFO L87 Difference]: Start difference. First operand 8091 states and 37076 transitions. Second operand 16 states. [2020-04-17 22:51:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:42,376 INFO L93 Difference]: Finished difference Result 26686 states and 100402 transitions. [2020-04-17 22:51:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:42,377 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:42,461 INFO L225 Difference]: With dead ends: 26686 [2020-04-17 22:51:42,461 INFO L226 Difference]: Without dead ends: 26674 [2020-04-17 22:51:42,462 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:42,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26674 states. [2020-04-17 22:51:42,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26674 to 7861. [2020-04-17 22:51:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7861 states. [2020-04-17 22:51:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 36066 transitions. [2020-04-17 22:51:42,877 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 36066 transitions. Word has length 21 [2020-04-17 22:51:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:42,878 INFO L479 AbstractCegarLoop]: Abstraction has 7861 states and 36066 transitions. [2020-04-17 22:51:42,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 36066 transitions. [2020-04-17 22:51:42,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:42,879 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:42,879 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:43,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:43,080 INFO L427 AbstractCegarLoop]: === Iteration 14 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:43,080 INFO L82 PathProgramCache]: Analyzing trace with hash -168366002, now seen corresponding path program 4 times [2020-04-17 22:51:43,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:43,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623609875] [2020-04-17 22:51:43,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:43,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623609875] [2020-04-17 22:51:43,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227079584] [2020-04-17 22:51:43,161 INFO L92 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 [2020-04-17 22:51:43,241 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:51:43,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:43,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:43,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:51:43,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:43,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:43,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071271647] [2020-04-17 22:51:43,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:43,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:43,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:43,337 INFO L87 Difference]: Start difference. First operand 7861 states and 36066 transitions. Second operand 16 states. [2020-04-17 22:51:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:44,579 INFO L93 Difference]: Finished difference Result 26489 states and 99650 transitions. [2020-04-17 22:51:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:44,579 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:44,650 INFO L225 Difference]: With dead ends: 26489 [2020-04-17 22:51:44,651 INFO L226 Difference]: Without dead ends: 26473 [2020-04-17 22:51:44,651 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26473 states. [2020-04-17 22:51:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26473 to 7748. [2020-04-17 22:51:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7748 states. [2020-04-17 22:51:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7748 states to 7748 states and 35514 transitions. [2020-04-17 22:51:45,046 INFO L78 Accepts]: Start accepts. Automaton has 7748 states and 35514 transitions. Word has length 21 [2020-04-17 22:51:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:45,046 INFO L479 AbstractCegarLoop]: Abstraction has 7748 states and 35514 transitions. [2020-04-17 22:51:45,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 7748 states and 35514 transitions. [2020-04-17 22:51:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:45,047 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:45,047 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:45,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:45,248 INFO L427 AbstractCegarLoop]: === Iteration 15 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash 210203517, now seen corresponding path program 1 times [2020-04-17 22:51:45,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:45,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495662712] [2020-04-17 22:51:45,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:51:45,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495662712] [2020-04-17 22:51:45,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:45,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:45,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940554975] [2020-04-17 22:51:45,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:45,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:45,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:45,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:45,283 INFO L87 Difference]: Start difference. First operand 7748 states and 35514 transitions. Second operand 5 states. [2020-04-17 22:51:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:45,482 INFO L93 Difference]: Finished difference Result 13251 states and 57501 transitions. [2020-04-17 22:51:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:45,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-04-17 22:51:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:45,532 INFO L225 Difference]: With dead ends: 13251 [2020-04-17 22:51:45,533 INFO L226 Difference]: Without dead ends: 13220 [2020-04-17 22:51:45,533 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13220 states. [2020-04-17 22:51:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13220 to 9255. [2020-04-17 22:51:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9255 states. [2020-04-17 22:51:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9255 states to 9255 states and 42368 transitions. [2020-04-17 22:51:45,832 INFO L78 Accepts]: Start accepts. Automaton has 9255 states and 42368 transitions. Word has length 21 [2020-04-17 22:51:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:45,832 INFO L479 AbstractCegarLoop]: Abstraction has 9255 states and 42368 transitions. [2020-04-17 22:51:45,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:45,832 INFO L276 IsEmpty]: Start isEmpty. Operand 9255 states and 42368 transitions. [2020-04-17 22:51:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:45,833 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:45,833 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:45,834 INFO L427 AbstractCegarLoop]: === Iteration 16 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:45,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1134578958, now seen corresponding path program 5 times [2020-04-17 22:51:45,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:45,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583372334] [2020-04-17 22:51:45,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:45,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583372334] [2020-04-17 22:51:45,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:45,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:51:45,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932371046] [2020-04-17 22:51:45,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:51:45,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:45,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:51:45,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:51:45,910 INFO L87 Difference]: Start difference. First operand 9255 states and 42368 transitions. Second operand 9 states. [2020-04-17 22:51:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:46,724 INFO L93 Difference]: Finished difference Result 29788 states and 113841 transitions. [2020-04-17 22:51:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:46,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:51:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:46,969 INFO L225 Difference]: With dead ends: 29788 [2020-04-17 22:51:46,970 INFO L226 Difference]: Without dead ends: 29770 [2020-04-17 22:51:46,970 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:51:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29770 states. [2020-04-17 22:51:47,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29770 to 8964. [2020-04-17 22:51:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8964 states. [2020-04-17 22:51:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8964 states to 8964 states and 41031 transitions. [2020-04-17 22:51:47,370 INFO L78 Accepts]: Start accepts. Automaton has 8964 states and 41031 transitions. Word has length 21 [2020-04-17 22:51:47,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:47,371 INFO L479 AbstractCegarLoop]: Abstraction has 8964 states and 41031 transitions. [2020-04-17 22:51:47,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:51:47,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8964 states and 41031 transitions. [2020-04-17 22:51:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:47,372 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:47,372 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:47,373 INFO L427 AbstractCegarLoop]: === Iteration 17 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:47,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:47,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1114967118, now seen corresponding path program 6 times [2020-04-17 22:51:47,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:47,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836865075] [2020-04-17 22:51:47,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:51:47,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836865075] [2020-04-17 22:51:47,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:47,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:51:47,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866131929] [2020-04-17 22:51:47,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:51:47,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:47,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:51:47,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:51:47,445 INFO L87 Difference]: Start difference. First operand 8964 states and 41031 transitions. Second operand 9 states. [2020-04-17 22:51:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:48,286 INFO L93 Difference]: Finished difference Result 29379 states and 112099 transitions. [2020-04-17 22:51:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:48,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:51:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:48,348 INFO L225 Difference]: With dead ends: 29379 [2020-04-17 22:51:48,348 INFO L226 Difference]: Without dead ends: 29356 [2020-04-17 22:51:48,349 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:51:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29356 states. [2020-04-17 22:51:48,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29356 to 8573. [2020-04-17 22:51:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8573 states. [2020-04-17 22:51:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8573 states to 8573 states and 39353 transitions. [2020-04-17 22:51:48,773 INFO L78 Accepts]: Start accepts. Automaton has 8573 states and 39353 transitions. Word has length 21 [2020-04-17 22:51:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:48,773 INFO L479 AbstractCegarLoop]: Abstraction has 8573 states and 39353 transitions. [2020-04-17 22:51:48,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:51:48,773 INFO L276 IsEmpty]: Start isEmpty. Operand 8573 states and 39353 transitions. [2020-04-17 22:51:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:51:48,775 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:48,775 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:48,775 INFO L427 AbstractCegarLoop]: === Iteration 18 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:48,775 INFO L82 PathProgramCache]: Analyzing trace with hash 715669452, now seen corresponding path program 1 times [2020-04-17 22:51:48,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:48,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126053975] [2020-04-17 22:51:48,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:51:48,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126053975] [2020-04-17 22:51:48,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200062059] [2020-04-17 22:51:48,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:48,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:48,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:51:49,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:49,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:49,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247810108] [2020-04-17 22:51:49,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:49,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:49,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:49,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:49,049 INFO L87 Difference]: Start difference. First operand 8573 states and 39353 transitions. Second operand 12 states. [2020-04-17 22:51:49,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:49,586 INFO L93 Difference]: Finished difference Result 19727 states and 80274 transitions. [2020-04-17 22:51:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:49,587 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:51:49,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:49,629 INFO L225 Difference]: With dead ends: 19727 [2020-04-17 22:51:49,629 INFO L226 Difference]: Without dead ends: 19703 [2020-04-17 22:51:49,629 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:51:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19703 states. [2020-04-17 22:51:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19703 to 8847. [2020-04-17 22:51:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8847 states. [2020-04-17 22:51:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 40495 transitions. [2020-04-17 22:51:49,931 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 40495 transitions. Word has length 23 [2020-04-17 22:51:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:49,932 INFO L479 AbstractCegarLoop]: Abstraction has 8847 states and 40495 transitions. [2020-04-17 22:51:49,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 40495 transitions. [2020-04-17 22:51:49,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:51:49,933 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:49,934 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:50,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:50,139 INFO L427 AbstractCegarLoop]: === Iteration 19 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:50,139 INFO L82 PathProgramCache]: Analyzing trace with hash 504272987, now seen corresponding path program 1 times [2020-04-17 22:51:50,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:50,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810609868] [2020-04-17 22:51:50,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:51:50,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810609868] [2020-04-17 22:51:50,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741650261] [2020-04-17 22:51:50,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:50,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:50,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:51:50,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:50,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:50,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063644344] [2020-04-17 22:51:50,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:50,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:50,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:50,328 INFO L87 Difference]: Start difference. First operand 8847 states and 40495 transitions. Second operand 12 states. [2020-04-17 22:51:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:50,706 INFO L93 Difference]: Finished difference Result 20694 states and 84261 transitions. [2020-04-17 22:51:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:50,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:51:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:50,750 INFO L225 Difference]: With dead ends: 20694 [2020-04-17 22:51:50,751 INFO L226 Difference]: Without dead ends: 20666 [2020-04-17 22:51:50,751 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:51:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20666 states. [2020-04-17 22:51:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20666 to 9115. [2020-04-17 22:51:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9115 states. [2020-04-17 22:51:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 41679 transitions. [2020-04-17 22:51:51,069 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 41679 transitions. Word has length 23 [2020-04-17 22:51:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:51,069 INFO L479 AbstractCegarLoop]: Abstraction has 9115 states and 41679 transitions. [2020-04-17 22:51:51,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 41679 transitions. [2020-04-17 22:51:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:51:51,071 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:51,071 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:51,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:51,275 INFO L427 AbstractCegarLoop]: === Iteration 20 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:51,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:51,276 INFO L82 PathProgramCache]: Analyzing trace with hash 591685125, now seen corresponding path program 1 times [2020-04-17 22:51:51,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:51,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310433879] [2020-04-17 22:51:51,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:51:51,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310433879] [2020-04-17 22:51:51,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263088834] [2020-04-17 22:51:51,330 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2020-04-17 22:51:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:51,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:51,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:51:51,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:51,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:51,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267042547] [2020-04-17 22:51:51,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:51,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:51,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:51,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:51,486 INFO L87 Difference]: Start difference. First operand 9115 states and 41679 transitions. Second operand 12 states. [2020-04-17 22:51:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:51,864 INFO L93 Difference]: Finished difference Result 21396 states and 87360 transitions. [2020-04-17 22:51:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:51,865 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:51:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:51,910 INFO L225 Difference]: With dead ends: 21396 [2020-04-17 22:51:51,911 INFO L226 Difference]: Without dead ends: 21359 [2020-04-17 22:51:51,911 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:51:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21359 states. [2020-04-17 22:51:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21359 to 9320. [2020-04-17 22:51:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9320 states. [2020-04-17 22:51:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9320 states to 9320 states and 42648 transitions. [2020-04-17 22:51:52,259 INFO L78 Accepts]: Start accepts. Automaton has 9320 states and 42648 transitions. Word has length 23 [2020-04-17 22:51:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:52,259 INFO L479 AbstractCegarLoop]: Abstraction has 9320 states and 42648 transitions. [2020-04-17 22:51:52,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 9320 states and 42648 transitions. [2020-04-17 22:51:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:51:52,262 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:52,262 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:52,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:52,463 INFO L427 AbstractCegarLoop]: === Iteration 21 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash 142124187, now seen corresponding path program 2 times [2020-04-17 22:51:52,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:52,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452525266] [2020-04-17 22:51:52,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:52,667 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-04-17 22:51:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:51:52,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452525266] [2020-04-17 22:51:52,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:52,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:52,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180009200] [2020-04-17 22:51:52,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:52,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:52,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:52,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:52,688 INFO L87 Difference]: Start difference. First operand 9320 states and 42648 transitions. Second operand 7 states. [2020-04-17 22:51:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:53,065 INFO L93 Difference]: Finished difference Result 21489 states and 87752 transitions. [2020-04-17 22:51:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:53,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:51:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:53,112 INFO L225 Difference]: With dead ends: 21489 [2020-04-17 22:51:53,112 INFO L226 Difference]: Without dead ends: 21452 [2020-04-17 22:51:53,112 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:51:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21452 states. [2020-04-17 22:51:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21452 to 9401. [2020-04-17 22:51:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9401 states. [2020-04-17 22:51:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9401 states to 9401 states and 43010 transitions. [2020-04-17 22:51:53,457 INFO L78 Accepts]: Start accepts. Automaton has 9401 states and 43010 transitions. Word has length 23 [2020-04-17 22:51:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:53,458 INFO L479 AbstractCegarLoop]: Abstraction has 9401 states and 43010 transitions. [2020-04-17 22:51:53,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 9401 states and 43010 transitions. [2020-04-17 22:51:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:51:53,460 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:53,460 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:53,460 INFO L427 AbstractCegarLoop]: === Iteration 22 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:53,460 INFO L82 PathProgramCache]: Analyzing trace with hash 142117429, now seen corresponding path program 2 times [2020-04-17 22:51:53,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:53,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38393527] [2020-04-17 22:51:53,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:51:53,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38393527] [2020-04-17 22:51:53,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:53,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:53,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335484245] [2020-04-17 22:51:53,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:53,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:53,521 INFO L87 Difference]: Start difference. First operand 9401 states and 43010 transitions. Second operand 7 states. [2020-04-17 22:51:53,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:53,956 INFO L93 Difference]: Finished difference Result 21198 states and 86437 transitions. [2020-04-17 22:51:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:53,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:51:53,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:54,022 INFO L225 Difference]: With dead ends: 21198 [2020-04-17 22:51:54,022 INFO L226 Difference]: Without dead ends: 21161 [2020-04-17 22:51:54,022 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:51:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21161 states. [2020-04-17 22:51:54,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21161 to 9396. [2020-04-17 22:51:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9396 states. [2020-04-17 22:51:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9396 states to 9396 states and 42985 transitions. [2020-04-17 22:51:54,353 INFO L78 Accepts]: Start accepts. Automaton has 9396 states and 42985 transitions. Word has length 23 [2020-04-17 22:51:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:54,353 INFO L479 AbstractCegarLoop]: Abstraction has 9396 states and 42985 transitions. [2020-04-17 22:51:54,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9396 states and 42985 transitions. [2020-04-17 22:51:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:51:54,355 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:54,355 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:54,355 INFO L427 AbstractCegarLoop]: === Iteration 23 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:54,355 INFO L82 PathProgramCache]: Analyzing trace with hash 142103758, now seen corresponding path program 2 times [2020-04-17 22:51:54,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:54,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734378621] [2020-04-17 22:51:54,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:51:54,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734378621] [2020-04-17 22:51:54,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:54,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:54,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014443595] [2020-04-17 22:51:54,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:54,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:54,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:54,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:54,411 INFO L87 Difference]: Start difference. First operand 9396 states and 42985 transitions. Second operand 7 states. [2020-04-17 22:51:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:54,785 INFO L93 Difference]: Finished difference Result 21067 states and 85734 transitions. [2020-04-17 22:51:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:54,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:51:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:54,845 INFO L225 Difference]: With dead ends: 21067 [2020-04-17 22:51:54,845 INFO L226 Difference]: Without dead ends: 21030 [2020-04-17 22:51:54,846 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:51:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-04-17 22:51:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 9426. [2020-04-17 22:51:55,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9426 states. [2020-04-17 22:51:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9426 states to 9426 states and 43057 transitions. [2020-04-17 22:51:55,229 INFO L78 Accepts]: Start accepts. Automaton has 9426 states and 43057 transitions. Word has length 23 [2020-04-17 22:51:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:55,229 INFO L479 AbstractCegarLoop]: Abstraction has 9426 states and 43057 transitions. [2020-04-17 22:51:55,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 9426 states and 43057 transitions. [2020-04-17 22:51:55,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:51:55,232 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:55,232 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:55,232 INFO L427 AbstractCegarLoop]: === Iteration 24 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash 925732074, now seen corresponding path program 1 times [2020-04-17 22:51:55,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:55,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096479373] [2020-04-17 22:51:55,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:51:55,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096479373] [2020-04-17 22:51:55,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370586278] [2020-04-17 22:51:55,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:51:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:55,598 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:55,599 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:51:55,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:55,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:55,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650819223] [2020-04-17 22:51:55,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:55,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:55,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:55,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:55,730 INFO L87 Difference]: Start difference. First operand 9426 states and 43057 transitions. Second operand 16 states. [2020-04-17 22:51:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:56,843 INFO L93 Difference]: Finished difference Result 30145 states and 115754 transitions. [2020-04-17 22:51:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:56,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:51:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:56,912 INFO L225 Difference]: With dead ends: 30145 [2020-04-17 22:51:56,912 INFO L226 Difference]: Without dead ends: 30125 [2020-04-17 22:51:56,914 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30125 states. [2020-04-17 22:51:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30125 to 9338. [2020-04-17 22:51:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9338 states. [2020-04-17 22:51:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9338 states to 9338 states and 42582 transitions. [2020-04-17 22:51:57,368 INFO L78 Accepts]: Start accepts. Automaton has 9338 states and 42582 transitions. Word has length 25 [2020-04-17 22:51:57,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:57,369 INFO L479 AbstractCegarLoop]: Abstraction has 9338 states and 42582 transitions. [2020-04-17 22:51:57,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 9338 states and 42582 transitions. [2020-04-17 22:51:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:51:57,372 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:57,372 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:57,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:57,573 INFO L427 AbstractCegarLoop]: === Iteration 25 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:57,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1013144212, now seen corresponding path program 1 times [2020-04-17 22:51:57,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:57,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360434787] [2020-04-17 22:51:57,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:51:57,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360434787] [2020-04-17 22:51:57,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046928044] [2020-04-17 22:51:57,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:51:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:57,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:57,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:51:57,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:57,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:57,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693628973] [2020-04-17 22:51:57,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:57,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:57,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:57,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:57,830 INFO L87 Difference]: Start difference. First operand 9338 states and 42582 transitions. Second operand 16 states. [2020-04-17 22:51:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:58,831 INFO L93 Difference]: Finished difference Result 29696 states and 113916 transitions. [2020-04-17 22:51:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:58,832 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:51:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:58,905 INFO L225 Difference]: With dead ends: 29696 [2020-04-17 22:51:58,905 INFO L226 Difference]: Without dead ends: 29676 [2020-04-17 22:51:58,906 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29676 states. [2020-04-17 22:51:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29676 to 9291. [2020-04-17 22:51:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9291 states. [2020-04-17 22:51:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9291 states to 9291 states and 42295 transitions. [2020-04-17 22:51:59,366 INFO L78 Accepts]: Start accepts. Automaton has 9291 states and 42295 transitions. Word has length 25 [2020-04-17 22:51:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:59,366 INFO L479 AbstractCegarLoop]: Abstraction has 9291 states and 42295 transitions. [2020-04-17 22:51:59,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 9291 states and 42295 transitions. [2020-04-17 22:51:59,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:51:59,370 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:59,370 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:59,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:59,571 INFO L427 AbstractCegarLoop]: === Iteration 26 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:59,571 INFO L82 PathProgramCache]: Analyzing trace with hash 563583274, now seen corresponding path program 2 times [2020-04-17 22:51:59,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:59,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771452264] [2020-04-17 22:51:59,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:51:59,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771452264] [2020-04-17 22:51:59,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634745242] [2020-04-17 22:51:59,644 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:59,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:51:59,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:59,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:59,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:51:59,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:59,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:59,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881609981] [2020-04-17 22:51:59,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:59,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:59,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:59,844 INFO L87 Difference]: Start difference. First operand 9291 states and 42295 transitions. Second operand 16 states. [2020-04-17 22:52:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:00,863 INFO L93 Difference]: Finished difference Result 29267 states and 112142 transitions. [2020-04-17 22:52:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:00,863 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:00,932 INFO L225 Difference]: With dead ends: 29267 [2020-04-17 22:52:00,932 INFO L226 Difference]: Without dead ends: 29245 [2020-04-17 22:52:00,932 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29245 states. [2020-04-17 22:52:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29245 to 9288. [2020-04-17 22:52:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9288 states. [2020-04-17 22:52:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9288 states to 9288 states and 42242 transitions. [2020-04-17 22:52:01,410 INFO L78 Accepts]: Start accepts. Automaton has 9288 states and 42242 transitions. Word has length 25 [2020-04-17 22:52:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:01,410 INFO L479 AbstractCegarLoop]: Abstraction has 9288 states and 42242 transitions. [2020-04-17 22:52:01,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 9288 states and 42242 transitions. [2020-04-17 22:52:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:01,413 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:01,413 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:01,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:01,614 INFO L427 AbstractCegarLoop]: === Iteration 27 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:01,615 INFO L82 PathProgramCache]: Analyzing trace with hash 563576516, now seen corresponding path program 2 times [2020-04-17 22:52:01,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:01,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441206157] [2020-04-17 22:52:01,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:52:01,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441206157] [2020-04-17 22:52:01,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949454142] [2020-04-17 22:52:01,676 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-04-17 22:52:01,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:52:01,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:01,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:01,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:52:01,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:01,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:01,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47504291] [2020-04-17 22:52:01,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:01,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:01,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:01,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:01,876 INFO L87 Difference]: Start difference. First operand 9288 states and 42242 transitions. Second operand 16 states. [2020-04-17 22:52:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:02,994 INFO L93 Difference]: Finished difference Result 28920 states and 110796 transitions. [2020-04-17 22:52:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:02,994 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:03,058 INFO L225 Difference]: With dead ends: 28920 [2020-04-17 22:52:03,058 INFO L226 Difference]: Without dead ends: 28898 [2020-04-17 22:52:03,058 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28898 states. [2020-04-17 22:52:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28898 to 9176. [2020-04-17 22:52:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9176 states. [2020-04-17 22:52:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9176 states to 9176 states and 41695 transitions. [2020-04-17 22:52:03,465 INFO L78 Accepts]: Start accepts. Automaton has 9176 states and 41695 transitions. Word has length 25 [2020-04-17 22:52:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:03,465 INFO L479 AbstractCegarLoop]: Abstraction has 9176 states and 41695 transitions. [2020-04-17 22:52:03,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 9176 states and 41695 transitions. [2020-04-17 22:52:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:03,468 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:03,468 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:03,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:03,669 INFO L427 AbstractCegarLoop]: === Iteration 28 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:03,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2052215638, now seen corresponding path program 3 times [2020-04-17 22:52:03,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:03,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536496073] [2020-04-17 22:52:03,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-04-17 22:52:03,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536496073] [2020-04-17 22:52:03,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108556614] [2020-04-17 22:52:03,729 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 22:52:03,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:52:03,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:03,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:03,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-04-17 22:52:03,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:03,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:03,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989296663] [2020-04-17 22:52:03,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:03,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:03,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:03,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:03,918 INFO L87 Difference]: Start difference. First operand 9176 states and 41695 transitions. Second operand 16 states. [2020-04-17 22:52:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:04,948 INFO L93 Difference]: Finished difference Result 29038 states and 111216 transitions. [2020-04-17 22:52:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:04,948 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:05,012 INFO L225 Difference]: With dead ends: 29038 [2020-04-17 22:52:05,012 INFO L226 Difference]: Without dead ends: 29018 [2020-04-17 22:52:05,012 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29018 states. [2020-04-17 22:52:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29018 to 9000. [2020-04-17 22:52:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9000 states. [2020-04-17 22:52:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9000 states to 9000 states and 40897 transitions. [2020-04-17 22:52:05,428 INFO L78 Accepts]: Start accepts. Automaton has 9000 states and 40897 transitions. Word has length 25 [2020-04-17 22:52:05,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:05,429 INFO L479 AbstractCegarLoop]: Abstraction has 9000 states and 40897 transitions. [2020-04-17 22:52:05,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 9000 states and 40897 transitions. [2020-04-17 22:52:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:05,432 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:05,432 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:05,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:05,633 INFO L427 AbstractCegarLoop]: === Iteration 29 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash -275395741, now seen corresponding path program 1 times [2020-04-17 22:52:05,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:05,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945336500] [2020-04-17 22:52:05,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-04-17 22:52:05,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945336500] [2020-04-17 22:52:05,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026731092] [2020-04-17 22:52:05,692 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2020-04-17 22:52:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:05,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:05,773 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-04-17 22:52:05,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:05,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:05,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791059211] [2020-04-17 22:52:05,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:05,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:05,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:05,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:05,873 INFO L87 Difference]: Start difference. First operand 9000 states and 40897 transitions. Second operand 16 states. [2020-04-17 22:52:06,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:06,963 INFO L93 Difference]: Finished difference Result 29417 states and 113034 transitions. [2020-04-17 22:52:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:06,964 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:07,033 INFO L225 Difference]: With dead ends: 29417 [2020-04-17 22:52:07,034 INFO L226 Difference]: Without dead ends: 29397 [2020-04-17 22:52:07,034 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29397 states. [2020-04-17 22:52:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29397 to 8990. [2020-04-17 22:52:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8990 states. [2020-04-17 22:52:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 40786 transitions. [2020-04-17 22:52:07,437 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 40786 transitions. Word has length 25 [2020-04-17 22:52:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:07,437 INFO L479 AbstractCegarLoop]: Abstraction has 8990 states and 40786 transitions. [2020-04-17 22:52:07,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 40786 transitions. [2020-04-17 22:52:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:07,442 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:07,442 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:07,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:07,643 INFO L427 AbstractCegarLoop]: === Iteration 30 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash -724963437, now seen corresponding path program 2 times [2020-04-17 22:52:07,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:07,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140691616] [2020-04-17 22:52:07,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:52:07,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140691616] [2020-04-17 22:52:07,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489809229] [2020-04-17 22:52:07,711 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 22:52:07,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:52:07,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:07,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:07,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:52:07,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:07,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:07,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271976921] [2020-04-17 22:52:07,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:07,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:07,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:07,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:07,910 INFO L87 Difference]: Start difference. First operand 8990 states and 40786 transitions. Second operand 16 states. [2020-04-17 22:52:08,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:08,851 INFO L93 Difference]: Finished difference Result 29064 states and 111552 transitions. [2020-04-17 22:52:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:08,851 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:08,913 INFO L225 Difference]: With dead ends: 29064 [2020-04-17 22:52:08,913 INFO L226 Difference]: Without dead ends: 29037 [2020-04-17 22:52:08,914 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29037 states. [2020-04-17 22:52:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29037 to 8953. [2020-04-17 22:52:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8953 states. [2020-04-17 22:52:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8953 states to 8953 states and 40609 transitions. [2020-04-17 22:52:09,508 INFO L78 Accepts]: Start accepts. Automaton has 8953 states and 40609 transitions. Word has length 25 [2020-04-17 22:52:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:09,509 INFO L479 AbstractCegarLoop]: Abstraction has 8953 states and 40609 transitions. [2020-04-17 22:52:09,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 8953 states and 40609 transitions. [2020-04-17 22:52:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:09,512 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:09,512 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:09,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:09,713 INFO L427 AbstractCegarLoop]: === Iteration 31 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:09,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:09,714 INFO L82 PathProgramCache]: Analyzing trace with hash -724977108, now seen corresponding path program 4 times [2020-04-17 22:52:09,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:09,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730233094] [2020-04-17 22:52:09,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:52:09,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730233094] [2020-04-17 22:52:09,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300746023] [2020-04-17 22:52:09,786 INFO L92 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 [2020-04-17 22:52:09,872 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:52:09,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:09,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:09,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:52:09,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:09,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:09,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538371489] [2020-04-17 22:52:09,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:09,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:09,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:09,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:09,966 INFO L87 Difference]: Start difference. First operand 8953 states and 40609 transitions. Second operand 16 states. [2020-04-17 22:52:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:10,911 INFO L93 Difference]: Finished difference Result 28523 states and 109227 transitions. [2020-04-17 22:52:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:10,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:10,983 INFO L225 Difference]: With dead ends: 28523 [2020-04-17 22:52:10,983 INFO L226 Difference]: Without dead ends: 28501 [2020-04-17 22:52:10,984 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28501 states. [2020-04-17 22:52:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28501 to 8841. [2020-04-17 22:52:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8841 states. [2020-04-17 22:52:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 40062 transitions. [2020-04-17 22:52:11,457 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 40062 transitions. Word has length 25 [2020-04-17 22:52:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:11,457 INFO L479 AbstractCegarLoop]: Abstraction has 8841 states and 40062 transitions. [2020-04-17 22:52:11,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 40062 transitions. [2020-04-17 22:52:11,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:11,462 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:11,462 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:11,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:11,663 INFO L427 AbstractCegarLoop]: === Iteration 32 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1969402905, now seen corresponding path program 3 times [2020-04-17 22:52:11,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:11,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118343832] [2020-04-17 22:52:11,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:52:11,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118343832] [2020-04-17 22:52:11,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231267026] [2020-04-17 22:52:11,729 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:11,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:52:11,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:11,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:11,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:52:11,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:11,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:11,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430181911] [2020-04-17 22:52:11,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:11,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:11,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:11,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:11,921 INFO L87 Difference]: Start difference. First operand 8841 states and 40062 transitions. Second operand 16 states. [2020-04-17 22:52:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:12,801 INFO L93 Difference]: Finished difference Result 28636 states and 109852 transitions. [2020-04-17 22:52:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:12,801 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:12,873 INFO L225 Difference]: With dead ends: 28636 [2020-04-17 22:52:12,873 INFO L226 Difference]: Without dead ends: 28616 [2020-04-17 22:52:12,874 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2020-04-17 22:52:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 8702. [2020-04-17 22:52:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8702 states. [2020-04-17 22:52:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8702 states to 8702 states and 39438 transitions. [2020-04-17 22:52:13,287 INFO L78 Accepts]: Start accepts. Automaton has 8702 states and 39438 transitions. Word has length 25 [2020-04-17 22:52:13,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:13,288 INFO L479 AbstractCegarLoop]: Abstraction has 8702 states and 39438 transitions. [2020-04-17 22:52:13,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8702 states and 39438 transitions. [2020-04-17 22:52:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:13,291 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:13,291 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:13,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:13,493 INFO L427 AbstractCegarLoop]: === Iteration 33 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1576190868, now seen corresponding path program 3 times [2020-04-17 22:52:13,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:13,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556200549] [2020-04-17 22:52:13,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:52:13,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556200549] [2020-04-17 22:52:13,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903687105] [2020-04-17 22:52:13,565 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 22:52:13,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:52:13,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:13,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:13,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:52:13,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:13,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:13,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161408635] [2020-04-17 22:52:13,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:13,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:13,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:13,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:13,773 INFO L87 Difference]: Start difference. First operand 8702 states and 39438 transitions. Second operand 16 states. [2020-04-17 22:52:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:14,787 INFO L93 Difference]: Finished difference Result 28297 states and 108461 transitions. [2020-04-17 22:52:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:14,787 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:14,850 INFO L225 Difference]: With dead ends: 28297 [2020-04-17 22:52:14,850 INFO L226 Difference]: Without dead ends: 28277 [2020-04-17 22:52:14,851 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28277 states. [2020-04-17 22:52:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28277 to 8596. [2020-04-17 22:52:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8596 states. [2020-04-17 22:52:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 38978 transitions. [2020-04-17 22:52:15,239 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 38978 transitions. Word has length 25 [2020-04-17 22:52:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:15,239 INFO L479 AbstractCegarLoop]: Abstraction has 8596 states and 38978 transitions. [2020-04-17 22:52:15,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 38978 transitions. [2020-04-17 22:52:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:15,242 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:15,242 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:15,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:15,443 INFO L427 AbstractCegarLoop]: === Iteration 34 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:15,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1673729315, now seen corresponding path program 4 times [2020-04-17 22:52:15,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:15,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746715048] [2020-04-17 22:52:15,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:52:15,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746715048] [2020-04-17 22:52:15,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454277494] [2020-04-17 22:52:15,512 INFO L92 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 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 [2020-04-17 22:52:15,594 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:52:15,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:15,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:15,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:52:15,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:15,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:15,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119282571] [2020-04-17 22:52:15,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:15,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:15,685 INFO L87 Difference]: Start difference. First operand 8596 states and 38978 transitions. Second operand 16 states. [2020-04-17 22:52:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:16,772 INFO L93 Difference]: Finished difference Result 28565 states and 109596 transitions. [2020-04-17 22:52:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:16,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:16,833 INFO L225 Difference]: With dead ends: 28565 [2020-04-17 22:52:16,833 INFO L226 Difference]: Without dead ends: 28538 [2020-04-17 22:52:16,833 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28538 states. [2020-04-17 22:52:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28538 to 8563. [2020-04-17 22:52:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8563 states. [2020-04-17 22:52:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8563 states to 8563 states and 38809 transitions. [2020-04-17 22:52:17,225 INFO L78 Accepts]: Start accepts. Automaton has 8563 states and 38809 transitions. Word has length 25 [2020-04-17 22:52:17,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:17,225 INFO L479 AbstractCegarLoop]: Abstraction has 8563 states and 38809 transitions. [2020-04-17 22:52:17,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8563 states and 38809 transitions. [2020-04-17 22:52:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:17,229 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:17,229 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:17,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:17,430 INFO L427 AbstractCegarLoop]: === Iteration 35 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:17,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:17,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1673708886, now seen corresponding path program 4 times [2020-04-17 22:52:17,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:17,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310979563] [2020-04-17 22:52:17,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:52:17,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310979563] [2020-04-17 22:52:17,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854698] [2020-04-17 22:52:17,508 INFO L92 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 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 [2020-04-17 22:52:17,585 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:52:17,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:17,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:17,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:52:17,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:17,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:17,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006897543] [2020-04-17 22:52:17,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:17,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:17,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:17,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:17,677 INFO L87 Difference]: Start difference. First operand 8563 states and 38809 transitions. Second operand 16 states. [2020-04-17 22:52:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:18,743 INFO L93 Difference]: Finished difference Result 28213 states and 108237 transitions. [2020-04-17 22:52:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:18,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:18,805 INFO L225 Difference]: With dead ends: 28213 [2020-04-17 22:52:18,805 INFO L226 Difference]: Without dead ends: 28186 [2020-04-17 22:52:18,805 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28186 states. [2020-04-17 22:52:19,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28186 to 8421. [2020-04-17 22:52:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8421 states. [2020-04-17 22:52:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8421 states to 8421 states and 38146 transitions. [2020-04-17 22:52:19,185 INFO L78 Accepts]: Start accepts. Automaton has 8421 states and 38146 transitions. Word has length 25 [2020-04-17 22:52:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:19,185 INFO L479 AbstractCegarLoop]: Abstraction has 8421 states and 38146 transitions. [2020-04-17 22:52:19,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 8421 states and 38146 transitions. [2020-04-17 22:52:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:19,188 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:19,188 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:19,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:19,389 INFO L427 AbstractCegarLoop]: === Iteration 36 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:19,390 INFO L82 PathProgramCache]: Analyzing trace with hash -857609261, now seen corresponding path program 5 times [2020-04-17 22:52:19,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:19,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403935748] [2020-04-17 22:52:19,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:52:19,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403935748] [2020-04-17 22:52:19,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:19,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:19,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775657760] [2020-04-17 22:52:19,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:19,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:19,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:19,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:19,477 INFO L87 Difference]: Start difference. First operand 8421 states and 38146 transitions. Second operand 9 states. [2020-04-17 22:52:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:20,503 INFO L93 Difference]: Finished difference Result 28226 states and 108274 transitions. [2020-04-17 22:52:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:20,503 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:20,562 INFO L225 Difference]: With dead ends: 28226 [2020-04-17 22:52:20,562 INFO L226 Difference]: Without dead ends: 28206 [2020-04-17 22:52:20,562 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:52:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28206 states. [2020-04-17 22:52:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28206 to 8277. [2020-04-17 22:52:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8277 states. [2020-04-17 22:52:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 37487 transitions. [2020-04-17 22:52:20,938 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 37487 transitions. Word has length 25 [2020-04-17 22:52:20,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:20,939 INFO L479 AbstractCegarLoop]: Abstraction has 8277 states and 37487 transitions. [2020-04-17 22:52:20,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 37487 transitions. [2020-04-17 22:52:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:20,942 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:20,942 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:20,942 INFO L427 AbstractCegarLoop]: === Iteration 37 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:20,943 INFO L82 PathProgramCache]: Analyzing trace with hash -857622932, now seen corresponding path program 5 times [2020-04-17 22:52:20,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:20,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676664155] [2020-04-17 22:52:20,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:52:21,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676664155] [2020-04-17 22:52:21,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:21,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:21,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741830176] [2020-04-17 22:52:21,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:21,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:21,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:21,007 INFO L87 Difference]: Start difference. First operand 8277 states and 37487 transitions. Second operand 9 states. [2020-04-17 22:52:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:21,824 INFO L93 Difference]: Finished difference Result 27801 states and 106552 transitions. [2020-04-17 22:52:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:21,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:21,886 INFO L225 Difference]: With dead ends: 27801 [2020-04-17 22:52:21,886 INFO L226 Difference]: Without dead ends: 27781 [2020-04-17 22:52:21,887 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:52:22,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27781 states. [2020-04-17 22:52:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27781 to 8127. [2020-04-17 22:52:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8127 states. [2020-04-17 22:52:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8127 states to 8127 states and 36806 transitions. [2020-04-17 22:52:22,264 INFO L78 Accepts]: Start accepts. Automaton has 8127 states and 36806 transitions. Word has length 25 [2020-04-17 22:52:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:22,264 INFO L479 AbstractCegarLoop]: Abstraction has 8127 states and 36806 transitions. [2020-04-17 22:52:22,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:22,264 INFO L276 IsEmpty]: Start isEmpty. Operand 8127 states and 36806 transitions. [2020-04-17 22:52:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:22,267 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:22,267 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:22,267 INFO L427 AbstractCegarLoop]: === Iteration 38 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash -864096941, now seen corresponding path program 6 times [2020-04-17 22:52:22,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:22,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822773496] [2020-04-17 22:52:22,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:52:22,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822773496] [2020-04-17 22:52:22,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:22,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:22,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709790883] [2020-04-17 22:52:22,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:22,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:22,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:22,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:22,321 INFO L87 Difference]: Start difference. First operand 8127 states and 36806 transitions. Second operand 9 states. [2020-04-17 22:52:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:23,142 INFO L93 Difference]: Finished difference Result 27548 states and 105447 transitions. [2020-04-17 22:52:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:23,143 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:23,202 INFO L225 Difference]: With dead ends: 27548 [2020-04-17 22:52:23,202 INFO L226 Difference]: Without dead ends: 27521 [2020-04-17 22:52:23,203 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:52:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27521 states. [2020-04-17 22:52:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27521 to 7841. [2020-04-17 22:52:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7841 states. [2020-04-17 22:52:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7841 states to 7841 states and 35578 transitions. [2020-04-17 22:52:23,590 INFO L78 Accepts]: Start accepts. Automaton has 7841 states and 35578 transitions. Word has length 25 [2020-04-17 22:52:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:23,590 INFO L479 AbstractCegarLoop]: Abstraction has 7841 states and 35578 transitions. [2020-04-17 22:52:23,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 7841 states and 35578 transitions. [2020-04-17 22:52:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:23,593 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:23,593 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:23,593 INFO L427 AbstractCegarLoop]: === Iteration 39 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:23,594 INFO L82 PathProgramCache]: Analyzing trace with hash -864117370, now seen corresponding path program 5 times [2020-04-17 22:52:23,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:23,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122960332] [2020-04-17 22:52:23,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:52:23,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122960332] [2020-04-17 22:52:23,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:23,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:23,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035376219] [2020-04-17 22:52:23,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:23,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:23,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:23,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:23,658 INFO L87 Difference]: Start difference. First operand 7841 states and 35578 transitions. Second operand 9 states. [2020-04-17 22:52:24,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:24,490 INFO L93 Difference]: Finished difference Result 27167 states and 103966 transitions. [2020-04-17 22:52:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:24,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:24,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:24,559 INFO L225 Difference]: With dead ends: 27167 [2020-04-17 22:52:24,559 INFO L226 Difference]: Without dead ends: 27147 [2020-04-17 22:52:24,560 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:52:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27147 states. [2020-04-17 22:52:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27147 to 7743. [2020-04-17 22:52:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7743 states. [2020-04-17 22:52:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7743 states to 7743 states and 35142 transitions. [2020-04-17 22:52:25,136 INFO L78 Accepts]: Start accepts. Automaton has 7743 states and 35142 transitions. Word has length 25 [2020-04-17 22:52:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:25,136 INFO L479 AbstractCegarLoop]: Abstraction has 7743 states and 35142 transitions. [2020-04-17 22:52:25,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7743 states and 35142 transitions. [2020-04-17 22:52:25,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:25,139 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:25,139 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:25,139 INFO L427 AbstractCegarLoop]: === Iteration 40 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:25,140 INFO L82 PathProgramCache]: Analyzing trace with hash -877234772, now seen corresponding path program 6 times [2020-04-17 22:52:25,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:25,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057336140] [2020-04-17 22:52:25,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:52:25,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057336140] [2020-04-17 22:52:25,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:25,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:25,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745980279] [2020-04-17 22:52:25,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:25,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:25,217 INFO L87 Difference]: Start difference. First operand 7743 states and 35142 transitions. Second operand 9 states. [2020-04-17 22:52:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:26,080 INFO L93 Difference]: Finished difference Result 26955 states and 103085 transitions. [2020-04-17 22:52:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:26,081 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:26,147 INFO L225 Difference]: With dead ends: 26955 [2020-04-17 22:52:26,147 INFO L226 Difference]: Without dead ends: 26928 [2020-04-17 22:52:26,147 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:52:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26928 states. [2020-04-17 22:52:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26928 to 7532. [2020-04-17 22:52:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7532 states. [2020-04-17 22:52:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7532 states to 7532 states and 34256 transitions. [2020-04-17 22:52:26,554 INFO L78 Accepts]: Start accepts. Automaton has 7532 states and 34256 transitions. Word has length 25 [2020-04-17 22:52:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:26,554 INFO L479 AbstractCegarLoop]: Abstraction has 7532 states and 34256 transitions. [2020-04-17 22:52:26,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 7532 states and 34256 transitions. [2020-04-17 22:52:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:26,558 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:26,558 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:26,559 INFO L427 AbstractCegarLoop]: === Iteration 41 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:26,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:26,559 INFO L82 PathProgramCache]: Analyzing trace with hash -877241530, now seen corresponding path program 6 times [2020-04-17 22:52:26,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:26,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92261035] [2020-04-17 22:52:26,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:52:26,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92261035] [2020-04-17 22:52:26,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:26,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:26,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129547634] [2020-04-17 22:52:26,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:26,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:26,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:26,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:26,641 INFO L87 Difference]: Start difference. First operand 7532 states and 34256 transitions. Second operand 9 states. [2020-04-17 22:52:27,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:27,617 INFO L93 Difference]: Finished difference Result 26632 states and 101828 transitions. [2020-04-17 22:52:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:27,617 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:27,682 INFO L225 Difference]: With dead ends: 26632 [2020-04-17 22:52:27,682 INFO L226 Difference]: Without dead ends: 26605 [2020-04-17 22:52:27,682 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:52:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26605 states. [2020-04-17 22:52:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26605 to 7269. [2020-04-17 22:52:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7269 states. [2020-04-17 22:52:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 33154 transitions. [2020-04-17 22:52:28,050 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 33154 transitions. Word has length 25 [2020-04-17 22:52:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:28,051 INFO L479 AbstractCegarLoop]: Abstraction has 7269 states and 33154 transitions. [2020-04-17 22:52:28,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 33154 transitions. [2020-04-17 22:52:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:28,054 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:28,054 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:28,054 INFO L427 AbstractCegarLoop]: === Iteration 42 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1311164244, now seen corresponding path program 1 times [2020-04-17 22:52:28,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:28,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786286834] [2020-04-17 22:52:28,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-04-17 22:52:28,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786286834] [2020-04-17 22:52:28,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:28,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:52:28,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736463377] [2020-04-17 22:52:28,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:52:28,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:28,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:52:28,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:52:28,113 INFO L87 Difference]: Start difference. First operand 7269 states and 33154 transitions. Second operand 5 states. [2020-04-17 22:52:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:28,261 INFO L93 Difference]: Finished difference Result 11919 states and 51979 transitions. [2020-04-17 22:52:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:52:28,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-04-17 22:52:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:28,287 INFO L225 Difference]: With dead ends: 11919 [2020-04-17 22:52:28,288 INFO L226 Difference]: Without dead ends: 11887 [2020-04-17 22:52:28,288 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11887 states. [2020-04-17 22:52:28,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11887 to 8560. [2020-04-17 22:52:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8560 states. [2020-04-17 22:52:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 38495 transitions. [2020-04-17 22:52:28,516 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 38495 transitions. Word has length 25 [2020-04-17 22:52:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:28,516 INFO L479 AbstractCegarLoop]: Abstraction has 8560 states and 38495 transitions. [2020-04-17 22:52:28,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:52:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 38495 transitions. [2020-04-17 22:52:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 22:52:28,520 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:28,520 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:28,520 INFO L427 AbstractCegarLoop]: === Iteration 43 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:28,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1986416772, now seen corresponding path program 1 times [2020-04-17 22:52:28,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:28,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855183578] [2020-04-17 22:52:28,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:52:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:52:28,542 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:52:28,543 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:52:28,543 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:52:28,544 WARN L363 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:52:28,544 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-04-17 22:52:28,559 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,559 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,560 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,560 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,560 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,560 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,560 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,560 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,560 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,560 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,561 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,561 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,561 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,561 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,562 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,562 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,562 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,562 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,562 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,562 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,562 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,562 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,562 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,563 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,563 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,563 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,563 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,563 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,563 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,563 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,563 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,563 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,563 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,564 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,564 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,564 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,564 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,564 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,564 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,564 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,564 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,565 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,565 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,565 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,565 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,565 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,565 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,565 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,565 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,565 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,566 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,567 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,567 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,567 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,567 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,567 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,567 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,567 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,567 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,568 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,568 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,568 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,568 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,568 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,568 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,568 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,569 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,569 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,569 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,569 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,569 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,569 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,569 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,570 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,570 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,570 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,570 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,570 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,570 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,570 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,570 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,571 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,571 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,571 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,571 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,571 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,571 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,571 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,572 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,572 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,572 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,572 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,572 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,572 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,573 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,573 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,573 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,574 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,574 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,575 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,575 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,575 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,576 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,576 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,576 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,576 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,576 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,577 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,577 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,577 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,577 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,577 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,578 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,578 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,578 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,579 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,579 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,580 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,580 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,580 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,580 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,580 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,584 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,584 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,584 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,584 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,585 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,585 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,586 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,586 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,586 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,586 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,586 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,586 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,587 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,587 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,587 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,587 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,587 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,587 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,588 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,588 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,588 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,588 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,589 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,589 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,589 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,590 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,590 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,590 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,590 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,590 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,591 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,591 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,591 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,591 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,591 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,591 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:28,592 INFO L251 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-04-17 22:52:28,592 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:52:28,592 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:52:28,592 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:52:28,592 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:52:28,592 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:52:28,592 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:52:28,592 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:52:28,596 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:52:28,597 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 138 transitions, 396 flow [2020-04-17 22:52:28,597 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 156 places, 138 transitions, 396 flow [2020-04-17 22:52:28,613 INFO L129 PetriNetUnfolder]: 9/173 cut-off events. [2020-04-17 22:52:28,613 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2020-04-17 22:52:28,615 INFO L80 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 173 events. 9/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 284 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 208. Up to 14 conditions per place. [2020-04-17 22:52:28,619 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 156 places, 138 transitions, 396 flow [2020-04-17 22:52:28,636 INFO L129 PetriNetUnfolder]: 9/173 cut-off events. [2020-04-17 22:52:28,636 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2020-04-17 22:52:28,637 INFO L80 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 173 events. 9/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 284 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 208. Up to 14 conditions per place. [2020-04-17 22:52:28,642 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2832 [2020-04-17 22:52:28,642 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:52:30,493 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-04-17 22:52:30,804 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-04-17 22:52:30,905 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3678 [2020-04-17 22:52:30,906 INFO L214 etLargeBlockEncoding]: Total number of compositions: 113 [2020-04-17 22:52:30,906 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 45 transitions, 210 flow [2020-04-17 22:52:32,417 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 18584 states. [2020-04-17 22:52:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 18584 states. [2020-04-17 22:52:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:52:32,418 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:32,418 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:52:32,418 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1298891, now seen corresponding path program 1 times [2020-04-17 22:52:32,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:32,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661465372] [2020-04-17 22:52:32,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:52:32,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661465372] [2020-04-17 22:52:32,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:32,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:52:32,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650601277] [2020-04-17 22:52:32,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:52:32,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:32,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:52:32,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:52:32,429 INFO L87 Difference]: Start difference. First operand 18584 states. Second operand 3 states. [2020-04-17 22:52:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:32,558 INFO L93 Difference]: Finished difference Result 17885 states and 92755 transitions. [2020-04-17 22:52:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:52:32,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:52:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:32,608 INFO L225 Difference]: With dead ends: 17885 [2020-04-17 22:52:32,609 INFO L226 Difference]: Without dead ends: 16791 [2020-04-17 22:52:32,609 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:52:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16791 states. [2020-04-17 22:52:33,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16791 to 16791. [2020-04-17 22:52:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16791 states. [2020-04-17 22:52:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 86558 transitions. [2020-04-17 22:52:33,360 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 86558 transitions. Word has length 3 [2020-04-17 22:52:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:33,360 INFO L479 AbstractCegarLoop]: Abstraction has 16791 states and 86558 transitions. [2020-04-17 22:52:33,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:52:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 86558 transitions. [2020-04-17 22:52:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:52:33,361 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:33,361 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:33,361 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:33,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:33,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1091574945, now seen corresponding path program 1 times [2020-04-17 22:52:33,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:33,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545529642] [2020-04-17 22:52:33,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:52:33,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545529642] [2020-04-17 22:52:33,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:33,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:52:33,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091643708] [2020-04-17 22:52:33,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:52:33,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:33,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:52:33,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:52:33,386 INFO L87 Difference]: Start difference. First operand 16791 states and 86558 transitions. Second operand 5 states. [2020-04-17 22:52:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:33,628 INFO L93 Difference]: Finished difference Result 30985 states and 150574 transitions. [2020-04-17 22:52:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:52:33,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 22:52:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:33,714 INFO L225 Difference]: With dead ends: 30985 [2020-04-17 22:52:33,714 INFO L226 Difference]: Without dead ends: 30977 [2020-04-17 22:52:33,714 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30977 states. [2020-04-17 22:52:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30977 to 19868. [2020-04-17 22:52:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19868 states. [2020-04-17 22:52:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19868 states to 19868 states and 103363 transitions. [2020-04-17 22:52:36,875 INFO L78 Accepts]: Start accepts. Automaton has 19868 states and 103363 transitions. Word has length 9 [2020-04-17 22:52:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:36,876 INFO L479 AbstractCegarLoop]: Abstraction has 19868 states and 103363 transitions. [2020-04-17 22:52:36,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:52:36,876 INFO L276 IsEmpty]: Start isEmpty. Operand 19868 states and 103363 transitions. [2020-04-17 22:52:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:52:36,876 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:36,876 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:36,876 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash -231509072, now seen corresponding path program 1 times [2020-04-17 22:52:36,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:36,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814995439] [2020-04-17 22:52:36,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:52:36,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814995439] [2020-04-17 22:52:36,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:36,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:52:36,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126132058] [2020-04-17 22:52:36,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:52:36,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:36,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:52:36,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:52:36,905 INFO L87 Difference]: Start difference. First operand 19868 states and 103363 transitions. Second operand 5 states. [2020-04-17 22:52:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:37,181 INFO L93 Difference]: Finished difference Result 36296 states and 178836 transitions. [2020-04-17 22:52:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:52:37,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-17 22:52:37,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:37,292 INFO L225 Difference]: With dead ends: 36296 [2020-04-17 22:52:37,292 INFO L226 Difference]: Without dead ends: 36280 [2020-04-17 22:52:37,293 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36280 states. [2020-04-17 22:52:38,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36280 to 23806. [2020-04-17 22:52:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23806 states. [2020-04-17 22:52:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23806 states to 23806 states and 125455 transitions. [2020-04-17 22:52:38,576 INFO L78 Accepts]: Start accepts. Automaton has 23806 states and 125455 transitions. Word has length 13 [2020-04-17 22:52:38,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:38,576 INFO L479 AbstractCegarLoop]: Abstraction has 23806 states and 125455 transitions. [2020-04-17 22:52:38,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:52:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 23806 states and 125455 transitions. [2020-04-17 22:52:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:52:38,576 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:38,577 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:38,577 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash -588793474, now seen corresponding path program 1 times [2020-04-17 22:52:38,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:38,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223259914] [2020-04-17 22:52:38,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:52:38,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223259914] [2020-04-17 22:52:38,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551433856] [2020-04-17 22:52:38,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:38,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:52:38,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:52:38,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:38,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:52:38,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93343230] [2020-04-17 22:52:38,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:52:38,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:52:38,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:52:38,776 INFO L87 Difference]: Start difference. First operand 23806 states and 125455 transitions. Second operand 12 states. [2020-04-17 22:52:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:39,417 INFO L93 Difference]: Finished difference Result 56720 states and 262685 transitions. [2020-04-17 22:52:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:39,417 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 22:52:39,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:39,583 INFO L225 Difference]: With dead ends: 56720 [2020-04-17 22:52:39,583 INFO L226 Difference]: Without dead ends: 56704 [2020-04-17 22:52:39,584 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:52:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56704 states. [2020-04-17 22:52:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56704 to 23629. [2020-04-17 22:52:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23629 states. [2020-04-17 22:52:41,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23629 states to 23629 states and 124418 transitions. [2020-04-17 22:52:41,526 INFO L78 Accepts]: Start accepts. Automaton has 23629 states and 124418 transitions. Word has length 15 [2020-04-17 22:52:41,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:41,527 INFO L479 AbstractCegarLoop]: Abstraction has 23629 states and 124418 transitions. [2020-04-17 22:52:41,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:52:41,527 INFO L276 IsEmpty]: Start isEmpty. Operand 23629 states and 124418 transitions. [2020-04-17 22:52:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:52:41,527 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:41,527 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:41,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:41,728 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:41,729 INFO L82 PathProgramCache]: Analyzing trace with hash 858081470, now seen corresponding path program 2 times [2020-04-17 22:52:41,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:41,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685537448] [2020-04-17 22:52:41,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:52:41,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685537448] [2020-04-17 22:52:41,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:41,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:52:41,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615667701] [2020-04-17 22:52:41,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:52:41,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:41,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:52:41,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:41,778 INFO L87 Difference]: Start difference. First operand 23629 states and 124418 transitions. Second operand 7 states. [2020-04-17 22:52:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:42,336 INFO L93 Difference]: Finished difference Result 58078 states and 269185 transitions. [2020-04-17 22:52:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:42,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-04-17 22:52:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:42,501 INFO L225 Difference]: With dead ends: 58078 [2020-04-17 22:52:42,501 INFO L226 Difference]: Without dead ends: 58061 [2020-04-17 22:52:42,501 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:52:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58061 states. [2020-04-17 22:52:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58061 to 23109. [2020-04-17 22:52:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23109 states. [2020-04-17 22:52:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23109 states to 23109 states and 121651 transitions. [2020-04-17 22:52:43,986 INFO L78 Accepts]: Start accepts. Automaton has 23109 states and 121651 transitions. Word has length 15 [2020-04-17 22:52:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:43,986 INFO L479 AbstractCegarLoop]: Abstraction has 23109 states and 121651 transitions. [2020-04-17 22:52:43,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:52:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 23109 states and 121651 transitions. [2020-04-17 22:52:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:52:43,987 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:43,987 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:43,987 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:43,987 INFO L82 PathProgramCache]: Analyzing trace with hash 704376303, now seen corresponding path program 1 times [2020-04-17 22:52:43,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:43,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707121883] [2020-04-17 22:52:43,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:52:44,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707121883] [2020-04-17 22:52:44,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:44,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:52:44,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878067981] [2020-04-17 22:52:44,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:52:44,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:44,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:52:44,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:52:44,014 INFO L87 Difference]: Start difference. First operand 23109 states and 121651 transitions. Second operand 5 states. [2020-04-17 22:52:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:46,072 INFO L93 Difference]: Finished difference Result 41885 states and 209629 transitions. [2020-04-17 22:52:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:52:46,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-04-17 22:52:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:46,206 INFO L225 Difference]: With dead ends: 41885 [2020-04-17 22:52:46,206 INFO L226 Difference]: Without dead ends: 41856 [2020-04-17 22:52:46,207 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41856 states. [2020-04-17 22:52:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41856 to 28237. [2020-04-17 22:52:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28237 states. [2020-04-17 22:52:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28237 states to 28237 states and 150261 transitions. [2020-04-17 22:52:47,481 INFO L78 Accepts]: Start accepts. Automaton has 28237 states and 150261 transitions. Word has length 17 [2020-04-17 22:52:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:47,481 INFO L479 AbstractCegarLoop]: Abstraction has 28237 states and 150261 transitions. [2020-04-17 22:52:47,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:52:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 28237 states and 150261 transitions. [2020-04-17 22:52:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:52:47,482 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:47,482 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:47,482 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:47,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:47,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1918672061, now seen corresponding path program 1 times [2020-04-17 22:52:47,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:47,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697913692] [2020-04-17 22:52:47,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:52:47,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697913692] [2020-04-17 22:52:47,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850379189] [2020-04-17 22:52:47,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:52:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:47,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:52:47,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:52:47,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:47,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:52:47,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311678467] [2020-04-17 22:52:47,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:52:47,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:47,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:52:47,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:52:47,672 INFO L87 Difference]: Start difference. First operand 28237 states and 150261 transitions. Second operand 12 states. [2020-04-17 22:52:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:48,328 INFO L93 Difference]: Finished difference Result 66831 states and 314874 transitions. [2020-04-17 22:52:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:48,329 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:52:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:48,528 INFO L225 Difference]: With dead ends: 66831 [2020-04-17 22:52:48,529 INFO L226 Difference]: Without dead ends: 66807 [2020-04-17 22:52:48,529 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:52:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66807 states. [2020-04-17 22:52:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66807 to 28673. [2020-04-17 22:52:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28673 states. [2020-04-17 22:52:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28673 states to 28673 states and 152375 transitions. [2020-04-17 22:52:50,859 INFO L78 Accepts]: Start accepts. Automaton has 28673 states and 152375 transitions. Word has length 19 [2020-04-17 22:52:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:50,860 INFO L479 AbstractCegarLoop]: Abstraction has 28673 states and 152375 transitions. [2020-04-17 22:52:50,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:52:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 28673 states and 152375 transitions. [2020-04-17 22:52:50,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:52:50,861 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:50,861 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:51,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:51,064 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1064014108, now seen corresponding path program 1 times [2020-04-17 22:52:51,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:51,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625932850] [2020-04-17 22:52:51,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:52:51,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625932850] [2020-04-17 22:52:51,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285533553] [2020-04-17 22:52:51,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:52:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:51,194 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:52:51,194 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:52:51,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:51,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:52:51,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810412780] [2020-04-17 22:52:51,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:52:51,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:51,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:52:51,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:52:51,242 INFO L87 Difference]: Start difference. First operand 28673 states and 152375 transitions. Second operand 12 states. [2020-04-17 22:52:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:51,932 INFO L93 Difference]: Finished difference Result 69484 states and 328264 transitions. [2020-04-17 22:52:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:51,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:52:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:52,145 INFO L225 Difference]: With dead ends: 69484 [2020-04-17 22:52:52,145 INFO L226 Difference]: Without dead ends: 69451 [2020-04-17 22:52:52,146 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:52:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69451 states. [2020-04-17 22:52:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69451 to 28873. [2020-04-17 22:52:53,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28873 states. [2020-04-17 22:52:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28873 states to 28873 states and 153454 transitions. [2020-04-17 22:52:53,962 INFO L78 Accepts]: Start accepts. Automaton has 28873 states and 153454 transitions. Word has length 19 [2020-04-17 22:52:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:53,962 INFO L479 AbstractCegarLoop]: Abstraction has 28873 states and 153454 transitions. [2020-04-17 22:52:53,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:52:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 28873 states and 153454 transitions. [2020-04-17 22:52:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:52:53,963 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:53,963 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:54,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:54,164 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1699177508, now seen corresponding path program 2 times [2020-04-17 22:52:54,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:54,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376725176] [2020-04-17 22:52:54,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:52:54,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376725176] [2020-04-17 22:52:54,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:54,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:52:54,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707242363] [2020-04-17 22:52:54,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:52:54,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:54,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:52:54,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:54,208 INFO L87 Difference]: Start difference. First operand 28873 states and 153454 transitions. Second operand 7 states. [2020-04-17 22:52:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:54,861 INFO L93 Difference]: Finished difference Result 70510 states and 333491 transitions. [2020-04-17 22:52:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:54,862 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:52:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:55,695 INFO L225 Difference]: With dead ends: 70510 [2020-04-17 22:52:55,695 INFO L226 Difference]: Without dead ends: 70477 [2020-04-17 22:52:55,695 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:52:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70477 states. [2020-04-17 22:52:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70477 to 28942. [2020-04-17 22:52:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28942 states. [2020-04-17 22:52:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28942 states to 28942 states and 153921 transitions. [2020-04-17 22:52:57,394 INFO L78 Accepts]: Start accepts. Automaton has 28942 states and 153921 transitions. Word has length 19 [2020-04-17 22:52:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:57,395 INFO L479 AbstractCegarLoop]: Abstraction has 28942 states and 153921 transitions. [2020-04-17 22:52:57,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:52:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 28942 states and 153921 transitions. [2020-04-17 22:52:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:52:57,395 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:57,395 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:57,396 INFO L427 AbstractCegarLoop]: === Iteration 10 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:52:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:57,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1699205315, now seen corresponding path program 2 times [2020-04-17 22:52:57,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:57,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832956729] [2020-04-17 22:52:57,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:52:57,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832956729] [2020-04-17 22:52:57,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:57,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:52:57,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295527865] [2020-04-17 22:52:57,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:52:57,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:57,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:52:57,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:57,444 INFO L87 Difference]: Start difference. First operand 28942 states and 153921 transitions. Second operand 7 states. [2020-04-17 22:52:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:58,065 INFO L93 Difference]: Finished difference Result 70096 states and 331298 transitions. [2020-04-17 22:52:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:58,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:52:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:58,286 INFO L225 Difference]: With dead ends: 70096 [2020-04-17 22:52:58,286 INFO L226 Difference]: Without dead ends: 70063 [2020-04-17 22:52:58,287 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:52:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70063 states. [2020-04-17 22:53:02,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70063 to 29094. [2020-04-17 22:53:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29094 states. [2020-04-17 22:53:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29094 states to 29094 states and 154883 transitions. [2020-04-17 22:53:02,260 INFO L78 Accepts]: Start accepts. Automaton has 29094 states and 154883 transitions. Word has length 19 [2020-04-17 22:53:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:02,260 INFO L479 AbstractCegarLoop]: Abstraction has 29094 states and 154883 transitions. [2020-04-17 22:53:02,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:53:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 29094 states and 154883 transitions. [2020-04-17 22:53:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:02,262 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:02,262 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:02,262 INFO L427 AbstractCegarLoop]: === Iteration 11 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash -228866966, now seen corresponding path program 1 times [2020-04-17 22:53:02,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:02,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059592529] [2020-04-17 22:53:02,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:53:02,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059592529] [2020-04-17 22:53:02,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967776164] [2020-04-17 22:53:02,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:53:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:02,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:53:02,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:53:02,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:02,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:53:02,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803610297] [2020-04-17 22:53:02,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:53:02,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:02,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:53:02,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:53:02,511 INFO L87 Difference]: Start difference. First operand 29094 states and 154883 transitions. Second operand 16 states. [2020-04-17 22:53:03,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:03,890 INFO L93 Difference]: Finished difference Result 100731 states and 448596 transitions. [2020-04-17 22:53:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:03,890 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:53:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:04,192 INFO L225 Difference]: With dead ends: 100731 [2020-04-17 22:53:04,192 INFO L226 Difference]: Without dead ends: 100715 [2020-04-17 22:53:04,192 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:53:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100715 states. [2020-04-17 22:53:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100715 to 28719. [2020-04-17 22:53:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28719 states. [2020-04-17 22:53:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28719 states to 28719 states and 152760 transitions. [2020-04-17 22:53:07,053 INFO L78 Accepts]: Start accepts. Automaton has 28719 states and 152760 transitions. Word has length 21 [2020-04-17 22:53:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:07,053 INFO L479 AbstractCegarLoop]: Abstraction has 28719 states and 152760 transitions. [2020-04-17 22:53:07,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:53:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28719 states and 152760 transitions. [2020-04-17 22:53:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:07,054 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:07,054 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:07,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:07,255 INFO L427 AbstractCegarLoop]: === Iteration 12 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1302908714, now seen corresponding path program 2 times [2020-04-17 22:53:07,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:07,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443235766] [2020-04-17 22:53:07,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:53:07,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443235766] [2020-04-17 22:53:07,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589587867] [2020-04-17 22:53:07,311 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:07,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:53:07,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:53:07,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:53:07,402 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:53:07,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:07,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:53:07,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898868371] [2020-04-17 22:53:07,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:53:07,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:07,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:53:07,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:53:07,493 INFO L87 Difference]: Start difference. First operand 28719 states and 152760 transitions. Second operand 16 states. [2020-04-17 22:53:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:08,907 INFO L93 Difference]: Finished difference Result 99876 states and 444348 transitions. [2020-04-17 22:53:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:08,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:53:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:09,222 INFO L225 Difference]: With dead ends: 99876 [2020-04-17 22:53:09,222 INFO L226 Difference]: Without dead ends: 99855 [2020-04-17 22:53:09,222 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:53:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99855 states. [2020-04-17 22:53:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99855 to 28343. [2020-04-17 22:53:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28343 states. [2020-04-17 22:53:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 150639 transitions. [2020-04-17 22:53:13,977 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 150639 transitions. Word has length 21 [2020-04-17 22:53:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:13,977 INFO L479 AbstractCegarLoop]: Abstraction has 28343 states and 150639 transitions. [2020-04-17 22:53:13,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:53:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 150639 transitions. [2020-04-17 22:53:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:13,978 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:13,978 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:14,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:14,179 INFO L427 AbstractCegarLoop]: === Iteration 13 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:14,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1149181014, now seen corresponding path program 3 times [2020-04-17 22:53:14,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:14,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195279473] [2020-04-17 22:53:14,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:53:14,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195279473] [2020-04-17 22:53:14,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563770811] [2020-04-17 22:53:14,246 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 22:53:14,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:53:14,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:53:14,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:53:14,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:53:14,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:14,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:53:14,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826870999] [2020-04-17 22:53:14,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:53:14,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:14,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:53:14,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:53:14,422 INFO L87 Difference]: Start difference. First operand 28343 states and 150639 transitions. Second operand 16 states. [2020-04-17 22:53:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:15,868 INFO L93 Difference]: Finished difference Result 100071 states and 445291 transitions. [2020-04-17 22:53:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:15,868 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:53:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:16,178 INFO L225 Difference]: With dead ends: 100071 [2020-04-17 22:53:16,178 INFO L226 Difference]: Without dead ends: 100055 [2020-04-17 22:53:16,179 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:53:17,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100055 states. [2020-04-17 22:53:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100055 to 27654. [2020-04-17 22:53:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27654 states. [2020-04-17 22:53:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27654 states to 27654 states and 147080 transitions. [2020-04-17 22:53:18,933 INFO L78 Accepts]: Start accepts. Automaton has 27654 states and 147080 transitions. Word has length 21 [2020-04-17 22:53:18,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:18,933 INFO L479 AbstractCegarLoop]: Abstraction has 27654 states and 147080 transitions. [2020-04-17 22:53:18,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:53:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27654 states and 147080 transitions. [2020-04-17 22:53:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:18,934 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:18,935 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:19,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:19,136 INFO L427 AbstractCegarLoop]: === Iteration 14 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash 315341610, now seen corresponding path program 4 times [2020-04-17 22:53:19,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:19,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298763161] [2020-04-17 22:53:19,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:53:19,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298763161] [2020-04-17 22:53:19,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566811226] [2020-04-17 22:53:19,189 INFO L92 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 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 [2020-04-17 22:53:19,279 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:53:19,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:53:19,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:53:19,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:53:19,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:19,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:53:19,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117753612] [2020-04-17 22:53:19,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:53:19,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:19,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:53:19,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:53:19,368 INFO L87 Difference]: Start difference. First operand 27654 states and 147080 transitions. Second operand 16 states. [2020-04-17 22:53:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:22,943 INFO L93 Difference]: Finished difference Result 99523 states and 442763 transitions. [2020-04-17 22:53:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:22,943 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:53:22,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:23,227 INFO L225 Difference]: With dead ends: 99523 [2020-04-17 22:53:23,227 INFO L226 Difference]: Without dead ends: 99502 [2020-04-17 22:53:23,227 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:53:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99502 states. [2020-04-17 22:53:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99502 to 27278. [2020-04-17 22:53:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27278 states. [2020-04-17 22:53:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27278 states to 27278 states and 144959 transitions. [2020-04-17 22:53:25,333 INFO L78 Accepts]: Start accepts. Automaton has 27278 states and 144959 transitions. Word has length 21 [2020-04-17 22:53:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:25,333 INFO L479 AbstractCegarLoop]: Abstraction has 27278 states and 144959 transitions. [2020-04-17 22:53:25,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:53:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 27278 states and 144959 transitions. [2020-04-17 22:53:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:25,334 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:25,334 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:25,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:25,535 INFO L427 AbstractCegarLoop]: === Iteration 15 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:25,536 INFO L82 PathProgramCache]: Analyzing trace with hash -822012438, now seen corresponding path program 5 times [2020-04-17 22:53:25,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:25,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172075344] [2020-04-17 22:53:25,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:53:25,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172075344] [2020-04-17 22:53:25,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:25,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:53:25,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539486781] [2020-04-17 22:53:25,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:53:25,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:25,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:53:25,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:53:25,592 INFO L87 Difference]: Start difference. First operand 27278 states and 144959 transitions. Second operand 9 states. [2020-04-17 22:53:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:27,386 INFO L93 Difference]: Finished difference Result 99710 states and 443686 transitions. [2020-04-17 22:53:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:27,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:53:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:27,689 INFO L225 Difference]: With dead ends: 99710 [2020-04-17 22:53:27,690 INFO L226 Difference]: Without dead ends: 99694 [2020-04-17 22:53:27,690 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:53:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99694 states. [2020-04-17 22:53:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99694 to 26597. [2020-04-17 22:53:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26597 states. [2020-04-17 22:53:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26597 states to 26597 states and 141420 transitions. [2020-04-17 22:53:33,222 INFO L78 Accepts]: Start accepts. Automaton has 26597 states and 141420 transitions. Word has length 21 [2020-04-17 22:53:33,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:33,222 INFO L479 AbstractCegarLoop]: Abstraction has 26597 states and 141420 transitions. [2020-04-17 22:53:33,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:53:33,222 INFO L276 IsEmpty]: Start isEmpty. Operand 26597 states and 141420 transitions. [2020-04-17 22:53:33,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:33,223 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:33,223 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:33,223 INFO L427 AbstractCegarLoop]: === Iteration 16 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:33,223 INFO L82 PathProgramCache]: Analyzing trace with hash -848707158, now seen corresponding path program 6 times [2020-04-17 22:53:33,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:33,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360527129] [2020-04-17 22:53:33,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:53:33,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360527129] [2020-04-17 22:53:33,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:33,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:53:33,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597765323] [2020-04-17 22:53:33,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:53:33,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:33,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:53:33,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:53:33,283 INFO L87 Difference]: Start difference. First operand 26597 states and 141420 transitions. Second operand 9 states. [2020-04-17 22:53:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:34,582 INFO L93 Difference]: Finished difference Result 98863 states and 439458 transitions. [2020-04-17 22:53:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:34,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:53:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:34,868 INFO L225 Difference]: With dead ends: 98863 [2020-04-17 22:53:34,868 INFO L226 Difference]: Without dead ends: 98841 [2020-04-17 22:53:34,868 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:53:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98841 states. [2020-04-17 22:53:37,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98841 to 25744. [2020-04-17 22:53:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25744 states. [2020-04-17 22:53:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25744 states to 25744 states and 137181 transitions. [2020-04-17 22:53:37,396 INFO L78 Accepts]: Start accepts. Automaton has 25744 states and 137181 transitions. Word has length 21 [2020-04-17 22:53:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:37,397 INFO L479 AbstractCegarLoop]: Abstraction has 25744 states and 137181 transitions. [2020-04-17 22:53:37,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:53:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25744 states and 137181 transitions. [2020-04-17 22:53:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:37,398 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:37,398 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:37,398 INFO L427 AbstractCegarLoop]: === Iteration 17 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:37,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1818695965, now seen corresponding path program 1 times [2020-04-17 22:53:37,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:37,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093709301] [2020-04-17 22:53:37,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:53:37,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093709301] [2020-04-17 22:53:37,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:37,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:53:37,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698885088] [2020-04-17 22:53:37,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:53:37,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:37,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:53:37,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:53:37,434 INFO L87 Difference]: Start difference. First operand 25744 states and 137181 transitions. Second operand 5 states. [2020-04-17 22:53:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:37,766 INFO L93 Difference]: Finished difference Result 46463 states and 236107 transitions. [2020-04-17 22:53:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:53:37,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-04-17 22:53:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:37,908 INFO L225 Difference]: With dead ends: 46463 [2020-04-17 22:53:37,908 INFO L226 Difference]: Without dead ends: 46417 [2020-04-17 22:53:37,908 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:53:38,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46417 states. [2020-04-17 22:53:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46417 to 31960. [2020-04-17 22:53:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31960 states. [2020-04-17 22:53:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31960 states to 31960 states and 171209 transitions. [2020-04-17 22:53:39,324 INFO L78 Accepts]: Start accepts. Automaton has 31960 states and 171209 transitions. Word has length 21 [2020-04-17 22:53:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:39,325 INFO L479 AbstractCegarLoop]: Abstraction has 31960 states and 171209 transitions. [2020-04-17 22:53:39,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:53:39,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31960 states and 171209 transitions. [2020-04-17 22:53:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:53:39,326 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:39,326 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:39,326 INFO L427 AbstractCegarLoop]: === Iteration 18 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:39,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:39,327 INFO L82 PathProgramCache]: Analyzing trace with hash 605532395, now seen corresponding path program 1 times [2020-04-17 22:53:39,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:39,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576887227] [2020-04-17 22:53:39,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-17 22:53:39,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576887227] [2020-04-17 22:53:39,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931030711] [2020-04-17 22:53:39,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:53:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:39,459 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:53:39,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-17 22:53:39,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:39,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:53:39,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359813955] [2020-04-17 22:53:39,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:53:39,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:39,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:53:39,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:53:39,520 INFO L87 Difference]: Start difference. First operand 31960 states and 171209 transitions. Second operand 12 states. [2020-04-17 22:53:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:40,749 INFO L93 Difference]: Finished difference Result 75380 states and 361389 transitions. [2020-04-17 22:53:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:40,750 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:53:40,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:40,978 INFO L225 Difference]: With dead ends: 75380 [2020-04-17 22:53:40,978 INFO L226 Difference]: Without dead ends: 75344 [2020-04-17 22:53:40,979 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:53:41,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75344 states. [2020-04-17 22:53:42,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75344 to 32974. [2020-04-17 22:53:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32974 states. [2020-04-17 22:53:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32974 states to 32974 states and 176363 transitions. [2020-04-17 22:53:42,852 INFO L78 Accepts]: Start accepts. Automaton has 32974 states and 176363 transitions. Word has length 23 [2020-04-17 22:53:42,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:42,852 INFO L479 AbstractCegarLoop]: Abstraction has 32974 states and 176363 transitions. [2020-04-17 22:53:42,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:53:42,852 INFO L276 IsEmpty]: Start isEmpty. Operand 32974 states and 176363 transitions. [2020-04-17 22:53:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:53:42,854 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:42,854 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:43,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:43,055 INFO L427 AbstractCegarLoop]: === Iteration 19 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:43,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:43,056 INFO L82 PathProgramCache]: Analyzing trace with hash 768040394, now seen corresponding path program 1 times [2020-04-17 22:53:43,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:43,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474867764] [2020-04-17 22:53:43,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:53:43,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474867764] [2020-04-17 22:53:43,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386998675] [2020-04-17 22:53:43,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:53:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:43,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:53:43,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:53:43,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:43,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:53:43,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162447685] [2020-04-17 22:53:43,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:53:43,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:43,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:53:43,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:53:43,316 INFO L87 Difference]: Start difference. First operand 32974 states and 176363 transitions. Second operand 12 states. [2020-04-17 22:53:44,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:44,035 INFO L93 Difference]: Finished difference Result 79487 states and 381757 transitions. [2020-04-17 22:53:44,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:44,035 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:53:44,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:44,798 INFO L225 Difference]: With dead ends: 79487 [2020-04-17 22:53:44,798 INFO L226 Difference]: Without dead ends: 79445 [2020-04-17 22:53:44,798 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:53:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79445 states. [2020-04-17 22:53:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79445 to 33981. [2020-04-17 22:53:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33981 states. [2020-04-17 22:53:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33981 states to 33981 states and 181710 transitions. [2020-04-17 22:53:46,725 INFO L78 Accepts]: Start accepts. Automaton has 33981 states and 181710 transitions. Word has length 23 [2020-04-17 22:53:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:46,725 INFO L479 AbstractCegarLoop]: Abstraction has 33981 states and 181710 transitions. [2020-04-17 22:53:46,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:53:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 33981 states and 181710 transitions. [2020-04-17 22:53:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:53:46,727 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:46,727 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:46,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:46,928 INFO L427 AbstractCegarLoop]: === Iteration 20 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1041867770, now seen corresponding path program 1 times [2020-04-17 22:53:46,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:46,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661960961] [2020-04-17 22:53:46,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:53:46,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661960961] [2020-04-17 22:53:46,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801712067] [2020-04-17 22:53:46,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:53:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:47,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:53:47,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 22:53:47,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:47,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:53:47,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016400200] [2020-04-17 22:53:47,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:53:47,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:47,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:53:47,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:53:47,154 INFO L87 Difference]: Start difference. First operand 33981 states and 181710 transitions. Second operand 12 states. [2020-04-17 22:53:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:47,893 INFO L93 Difference]: Finished difference Result 82728 states and 398553 transitions. [2020-04-17 22:53:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:47,893 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:53:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:48,147 INFO L225 Difference]: With dead ends: 82728 [2020-04-17 22:53:48,148 INFO L226 Difference]: Without dead ends: 82673 [2020-04-17 22:53:48,148 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:53:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82673 states. [2020-04-17 22:53:50,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82673 to 34821. [2020-04-17 22:53:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34821 states. [2020-04-17 22:53:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34821 states to 34821 states and 186422 transitions. [2020-04-17 22:53:50,596 INFO L78 Accepts]: Start accepts. Automaton has 34821 states and 186422 transitions. Word has length 23 [2020-04-17 22:53:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:50,596 INFO L479 AbstractCegarLoop]: Abstraction has 34821 states and 186422 transitions. [2020-04-17 22:53:50,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:53:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 34821 states and 186422 transitions. [2020-04-17 22:53:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:53:50,598 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:50,598 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:50,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:50,799 INFO L427 AbstractCegarLoop]: === Iteration 21 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:50,800 INFO L82 PathProgramCache]: Analyzing trace with hash -284839030, now seen corresponding path program 2 times [2020-04-17 22:53:50,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:50,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764185453] [2020-04-17 22:53:50,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:53:50,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764185453] [2020-04-17 22:53:50,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:50,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:53:50,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798136587] [2020-04-17 22:53:50,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:53:50,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:53:50,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:53:50,842 INFO L87 Difference]: Start difference. First operand 34821 states and 186422 transitions. Second operand 7 states. [2020-04-17 22:53:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:51,540 INFO L93 Difference]: Finished difference Result 83507 states and 402693 transitions. [2020-04-17 22:53:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:51,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:53:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:51,798 INFO L225 Difference]: With dead ends: 83507 [2020-04-17 22:53:51,798 INFO L226 Difference]: Without dead ends: 83452 [2020-04-17 22:53:51,798 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:53:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83452 states. [2020-04-17 22:53:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83452 to 35694. [2020-04-17 22:53:54,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35694 states. [2020-04-17 22:53:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35694 states to 35694 states and 191145 transitions. [2020-04-17 22:53:54,314 INFO L78 Accepts]: Start accepts. Automaton has 35694 states and 191145 transitions. Word has length 23 [2020-04-17 22:53:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:54,314 INFO L479 AbstractCegarLoop]: Abstraction has 35694 states and 191145 transitions. [2020-04-17 22:53:54,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:53:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 35694 states and 191145 transitions. [2020-04-17 22:53:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:53:54,317 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:54,317 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:54,317 INFO L427 AbstractCegarLoop]: === Iteration 22 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:54,317 INFO L82 PathProgramCache]: Analyzing trace with hash -284850438, now seen corresponding path program 2 times [2020-04-17 22:53:54,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:54,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15542025] [2020-04-17 22:53:54,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:53:54,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15542025] [2020-04-17 22:53:54,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:54,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:53:54,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043056076] [2020-04-17 22:53:54,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:53:54,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:54,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:53:54,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:53:54,359 INFO L87 Difference]: Start difference. First operand 35694 states and 191145 transitions. Second operand 7 states. [2020-04-17 22:53:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:55,122 INFO L93 Difference]: Finished difference Result 83523 states and 402462 transitions. [2020-04-17 22:53:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:55,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:53:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:55,379 INFO L225 Difference]: With dead ends: 83523 [2020-04-17 22:53:55,379 INFO L226 Difference]: Without dead ends: 83468 [2020-04-17 22:53:55,379 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:53:56,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83468 states. [2020-04-17 22:53:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83468 to 36306. [2020-04-17 22:53:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36306 states. [2020-04-17 22:53:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36306 states to 36306 states and 194552 transitions. [2020-04-17 22:53:57,891 INFO L78 Accepts]: Start accepts. Automaton has 36306 states and 194552 transitions. Word has length 23 [2020-04-17 22:53:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:57,891 INFO L479 AbstractCegarLoop]: Abstraction has 36306 states and 194552 transitions. [2020-04-17 22:53:57,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:53:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 36306 states and 194552 transitions. [2020-04-17 22:53:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:53:57,893 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:57,893 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:57,893 INFO L427 AbstractCegarLoop]: === Iteration 23 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:53:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -284866837, now seen corresponding path program 2 times [2020-04-17 22:53:57,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:57,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111028627] [2020-04-17 22:53:57,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-17 22:53:57,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111028627] [2020-04-17 22:53:57,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:57,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:53:57,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675913763] [2020-04-17 22:53:57,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:53:57,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:57,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:53:57,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:53:57,935 INFO L87 Difference]: Start difference. First operand 36306 states and 194552 transitions. Second operand 7 states. [2020-04-17 22:53:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:58,634 INFO L93 Difference]: Finished difference Result 83918 states and 404136 transitions. [2020-04-17 22:53:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:58,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:53:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:58,888 INFO L225 Difference]: With dead ends: 83918 [2020-04-17 22:53:58,889 INFO L226 Difference]: Without dead ends: 83863 [2020-04-17 22:53:58,889 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:53:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83863 states. [2020-04-17 22:54:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83863 to 37062. [2020-04-17 22:54:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37062 states. [2020-04-17 22:54:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37062 states to 37062 states and 198528 transitions. [2020-04-17 22:54:01,449 INFO L78 Accepts]: Start accepts. Automaton has 37062 states and 198528 transitions. Word has length 23 [2020-04-17 22:54:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:01,449 INFO L479 AbstractCegarLoop]: Abstraction has 37062 states and 198528 transitions. [2020-04-17 22:54:01,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:54:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 37062 states and 198528 transitions. [2020-04-17 22:54:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:01,452 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:01,452 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:01,452 INFO L427 AbstractCegarLoop]: === Iteration 24 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:54:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:01,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1146013160, now seen corresponding path program 1 times [2020-04-17 22:54:01,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:01,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682862914] [2020-04-17 22:54:01,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:54:01,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682862914] [2020-04-17 22:54:01,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201147080] [2020-04-17 22:54:01,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:01,637 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:01,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:54:01,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:01,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:01,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345976545] [2020-04-17 22:54:01,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:01,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:01,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:01,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:01,736 INFO L87 Difference]: Start difference. First operand 37062 states and 198528 transitions. Second operand 16 states. [2020-04-17 22:54:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:03,407 INFO L93 Difference]: Finished difference Result 122892 states and 561130 transitions. [2020-04-17 22:54:03,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:03,408 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:03,759 INFO L225 Difference]: With dead ends: 122892 [2020-04-17 22:54:03,759 INFO L226 Difference]: Without dead ends: 122862 [2020-04-17 22:54:03,759 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:54:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122862 states. [2020-04-17 22:54:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122862 to 36727. [2020-04-17 22:54:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36727 states. [2020-04-17 22:54:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36727 states to 36727 states and 196466 transitions. [2020-04-17 22:54:06,934 INFO L78 Accepts]: Start accepts. Automaton has 36727 states and 196466 transitions. Word has length 25 [2020-04-17 22:54:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:06,934 INFO L479 AbstractCegarLoop]: Abstraction has 36727 states and 196466 transitions. [2020-04-17 22:54:06,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 36727 states and 196466 transitions. [2020-04-17 22:54:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:06,937 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:06,937 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:07,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:07,138 INFO L427 AbstractCegarLoop]: === Iteration 25 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:54:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:07,138 INFO L82 PathProgramCache]: Analyzing trace with hash -872185784, now seen corresponding path program 1 times [2020-04-17 22:54:07,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:07,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480302210] [2020-04-17 22:54:07,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:54:07,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480302210] [2020-04-17 22:54:07,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110965227] [2020-04-17 22:54:07,200 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2020-04-17 22:54:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:07,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:07,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-17 22:54:07,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:07,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:07,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520611746] [2020-04-17 22:54:07,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:07,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:07,381 INFO L87 Difference]: Start difference. First operand 36727 states and 196466 transitions. Second operand 16 states. [2020-04-17 22:54:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:09,365 INFO L93 Difference]: Finished difference Result 121590 states and 554657 transitions. [2020-04-17 22:54:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:09,366 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:09,719 INFO L225 Difference]: With dead ends: 121590 [2020-04-17 22:54:09,719 INFO L226 Difference]: Without dead ends: 121560 [2020-04-17 22:54:09,719 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:54:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121560 states. [2020-04-17 22:54:12,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121560 to 36513. [2020-04-17 22:54:12,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36513 states. [2020-04-17 22:54:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36513 states to 36513 states and 195090 transitions. [2020-04-17 22:54:12,994 INFO L78 Accepts]: Start accepts. Automaton has 36513 states and 195090 transitions. Word has length 25 [2020-04-17 22:54:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:12,995 INFO L479 AbstractCegarLoop]: Abstraction has 36513 states and 195090 transitions. [2020-04-17 22:54:12,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 36513 states and 195090 transitions. [2020-04-17 22:54:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:12,998 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:12,998 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:13,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:13,201 INFO L427 AbstractCegarLoop]: === Iteration 26 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:54:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:13,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2096074712, now seen corresponding path program 2 times [2020-04-17 22:54:13,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:13,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325785097] [2020-04-17 22:54:13,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-17 22:54:13,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325785097] [2020-04-17 22:54:13,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780549514] [2020-04-17 22:54:13,262 INFO L92 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 [2020-04-17 22:54:13,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:54:13,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:54:13,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:13,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-17 22:54:13,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:13,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:13,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829337163] [2020-04-17 22:54:13,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:13,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:13,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:13,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:13,432 INFO L87 Difference]: Start difference. First operand 36513 states and 195090 transitions. Second operand 16 states. [2020-04-17 22:54:14,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:14,880 INFO L93 Difference]: Finished difference Result 120395 states and 548664 transitions. [2020-04-17 22:54:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:14,880 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:15,226 INFO L225 Difference]: With dead ends: 120395 [2020-04-17 22:54:15,227 INFO L226 Difference]: Without dead ends: 120362 [2020-04-17 22:54:15,227 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:54:17,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120362 states. [2020-04-17 22:54:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120362 to 36444. [2020-04-17 22:54:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36444 states. [2020-04-17 22:54:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36444 states to 36444 states and 194571 transitions. [2020-04-17 22:54:18,237 INFO L78 Accepts]: Start accepts. Automaton has 36444 states and 194571 transitions. Word has length 25 [2020-04-17 22:54:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:18,237 INFO L479 AbstractCegarLoop]: Abstraction has 36444 states and 194571 transitions. [2020-04-17 22:54:18,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:18,238 INFO L276 IsEmpty]: Start isEmpty. Operand 36444 states and 194571 transitions. [2020-04-17 22:54:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:18,240 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:18,240 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:18,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:18,441 INFO L427 AbstractCegarLoop]: === Iteration 27 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:54:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2096063304, now seen corresponding path program 2 times [2020-04-17 22:54:18,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:18,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440678466] [2020-04-17 22:54:18,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-17 22:54:18,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440678466] [2020-04-17 22:54:18,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912828572] [2020-04-17 22:54:18,496 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 22:54:18,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:54:18,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:54:18,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:18,585 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-17 22:54:18,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:18,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:18,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830206147] [2020-04-17 22:54:18,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:18,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:18,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:18,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:18,663 INFO L87 Difference]: Start difference. First operand 36444 states and 194571 transitions. Second operand 16 states. [2020-04-17 22:54:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:20,517 INFO L93 Difference]: Finished difference Result 119346 states and 543724 transitions. [2020-04-17 22:54:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:20,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:20,839 INFO L225 Difference]: With dead ends: 119346 [2020-04-17 22:54:20,839 INFO L226 Difference]: Without dead ends: 119313 [2020-04-17 22:54:20,840 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:54:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119313 states. [2020-04-17 22:54:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119313 to 36040. [2020-04-17 22:54:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36040 states. [2020-04-17 22:54:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36040 states to 36040 states and 192287 transitions. [2020-04-17 22:54:23,901 INFO L78 Accepts]: Start accepts. Automaton has 36040 states and 192287 transitions. Word has length 25 [2020-04-17 22:54:23,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:23,901 INFO L479 AbstractCegarLoop]: Abstraction has 36040 states and 192287 transitions. [2020-04-17 22:54:23,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 36040 states and 192287 transitions. [2020-04-17 22:54:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:23,903 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:23,903 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:24,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:24,107 INFO L427 AbstractCegarLoop]: === Iteration 28 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:54:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash 582269272, now seen corresponding path program 3 times [2020-04-17 22:54:24,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:24,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466935469] [2020-04-17 22:54:24,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:54:24,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466935469] [2020-04-17 22:54:24,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954175604] [2020-04-17 22:54:24,162 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-17 22:54:24,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:54:24,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:54:24,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:24,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:54:24,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:24,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:24,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953628309] [2020-04-17 22:54:24,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:24,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:24,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:24,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:24,330 INFO L87 Difference]: Start difference. First operand 36040 states and 192287 transitions. Second operand 16 states. [2020-04-17 22:54:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:25,819 INFO L93 Difference]: Finished difference Result 119770 states and 545635 transitions. [2020-04-17 22:54:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:25,820 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:26,137 INFO L225 Difference]: With dead ends: 119770 [2020-04-17 22:54:26,137 INFO L226 Difference]: Without dead ends: 119740 [2020-04-17 22:54:26,137 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:54:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119740 states. [2020-04-17 22:54:28,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119740 to 35471. [2020-04-17 22:54:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35471 states. [2020-04-17 22:54:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35471 states to 35471 states and 189238 transitions. [2020-04-17 22:54:29,081 INFO L78 Accepts]: Start accepts. Automaton has 35471 states and 189238 transitions. Word has length 25 [2020-04-17 22:54:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:29,081 INFO L479 AbstractCegarLoop]: Abstraction has 35471 states and 189238 transitions. [2020-04-17 22:54:29,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 35471 states and 189238 transitions. [2020-04-17 22:54:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:29,083 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:29,083 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:29,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:29,284 INFO L427 AbstractCegarLoop]: === Iteration 29 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:54:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:29,284 INFO L82 PathProgramCache]: Analyzing trace with hash 679178599, now seen corresponding path program 1 times [2020-04-17 22:54:29,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:29,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165124208] [2020-04-17 22:54:29,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:54:29,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165124208] [2020-04-17 22:54:29,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133484585] [2020-04-17 22:54:29,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-17 22:54:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:29,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:29,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:54:29,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:29,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:29,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245173891] [2020-04-17 22:54:29,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:29,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:29,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:29,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:29,508 INFO L87 Difference]: Start difference. First operand 35471 states and 189238 transitions. Second operand 16 states. [2020-04-17 22:54:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:31,366 INFO L93 Difference]: Finished difference Result 121131 states and 553230 transitions. [2020-04-17 22:54:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:31,367 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:31,699 INFO L225 Difference]: With dead ends: 121131 [2020-04-17 22:54:31,699 INFO L226 Difference]: Without dead ends: 121101 [2020-04-17 22:54:31,700 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:54:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121101 states. [2020-04-17 22:54:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121101 to 35374. [2020-04-17 22:54:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35374 states. [2020-04-17 22:54:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35374 states to 35374 states and 188534 transitions. [2020-04-17 22:54:37,328 INFO L78 Accepts]: Start accepts. Automaton has 35374 states and 188534 transitions. Word has length 25 [2020-04-17 22:54:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:37,329 INFO L479 AbstractCegarLoop]: Abstraction has 35374 states and 188534 transitions. [2020-04-17 22:54:37,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 35374 states and 188534 transitions. [2020-04-17 22:54:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:37,331 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:37,331 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:37,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:37,532 INFO L427 AbstractCegarLoop]: === Iteration 30 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:54:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:37,532 INFO L82 PathProgramCache]: Analyzing trace with hash -647539609, now seen corresponding path program 2 times [2020-04-17 22:54:37,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:37,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923823226] [2020-04-17 22:54:37,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:54:37,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923823226] [2020-04-17 22:54:37,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999794964] [2020-04-17 22:54:37,585 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-17 22:54:37,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:54:37,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:54:37,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:37,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:54:37,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:37,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:37,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667042629] [2020-04-17 22:54:37,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:37,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:37,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:37,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:37,767 INFO L87 Difference]: Start difference. First operand 35374 states and 188534 transitions. Second operand 16 states. [2020-04-17 22:54:39,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:39,135 INFO L93 Difference]: Finished difference Result 120194 states and 548412 transitions. [2020-04-17 22:54:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:39,136 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:39,458 INFO L225 Difference]: With dead ends: 120194 [2020-04-17 22:54:39,458 INFO L226 Difference]: Without dead ends: 120154 [2020-04-17 22:54:39,458 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:54:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120154 states. [2020-04-17 22:54:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120154 to 35219. [2020-04-17 22:54:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35219 states. [2020-04-17 22:54:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35219 states to 35219 states and 187630 transitions. [2020-04-17 22:54:42,316 INFO L78 Accepts]: Start accepts. Automaton has 35219 states and 187630 transitions. Word has length 25 [2020-04-17 22:54:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:42,316 INFO L479 AbstractCegarLoop]: Abstraction has 35219 states and 187630 transitions. [2020-04-17 22:54:42,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 35219 states and 187630 transitions. [2020-04-17 22:54:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:42,319 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:42,319 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:42,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:42,519 INFO L427 AbstractCegarLoop]: === Iteration 31 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:54:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:42,520 INFO L82 PathProgramCache]: Analyzing trace with hash -647556008, now seen corresponding path program 4 times [2020-04-17 22:54:42,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:42,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404109238] [2020-04-17 22:54:42,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:54:42,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404109238] [2020-04-17 22:54:42,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981861882] [2020-04-17 22:54:42,579 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:42,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:54:42,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:54:42,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:42,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 22:54:42,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:42,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:42,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834409577] [2020-04-17 22:54:42,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:42,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:42,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:42,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:42,759 INFO L87 Difference]: Start difference. First operand 35219 states and 187630 transitions. Second operand 16 states. [2020-04-17 22:54:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:44,691 INFO L93 Difference]: Finished difference Result 118559 states and 539905 transitions. [2020-04-17 22:54:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:44,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:45,001 INFO L225 Difference]: With dead ends: 118559 [2020-04-17 22:54:45,001 INFO L226 Difference]: Without dead ends: 118526 [2020-04-17 22:54:45,001 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:54:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118526 states. [2020-04-17 22:54:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118526 to 34815. [2020-04-17 22:54:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34815 states. Received shutdown request... [2020-04-17 22:54:50,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:50,852 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 22:54:50,858 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 22:54:50,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 10:54:50 BasicIcfg [2020-04-17 22:54:50,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 22:54:50,859 INFO L168 Benchmark]: Toolchain (without parser) took 234702.67 ms. Allocated memory was 145.2 MB in the beginning and 3.2 GB in the end (delta: 3.1 GB). Free memory was 102.1 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2020-04-17 22:54:50,860 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-17 22:54:50,860 INFO L168 Benchmark]: CACSL2BoogieTranslator took 784.08 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 100.1 MB in the beginning and 160.8 MB in the end (delta: -60.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-04-17 22:54:50,860 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.79 ms. Allocated memory is still 201.3 MB. Free memory was 160.8 MB in the beginning and 158.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-04-17 22:54:50,861 INFO L168 Benchmark]: Boogie Preprocessor took 29.05 ms. Allocated memory is still 201.3 MB. Free memory was 158.6 MB in the beginning and 157.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 22:54:50,861 INFO L168 Benchmark]: RCFGBuilder took 405.89 ms. Allocated memory is still 201.3 MB. Free memory was 157.3 MB in the beginning and 136.7 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-04-17 22:54:50,861 INFO L168 Benchmark]: TraceAbstraction took 233405.81 ms. Allocated memory was 201.3 MB in the beginning and 3.2 GB in the end (delta: 3.0 GB). Free memory was 136.0 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2020-04-17 22:54:50,863 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 784.08 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 100.1 MB in the beginning and 160.8 MB in the end (delta: -60.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 50.79 ms. Allocated memory is still 201.3 MB. Free memory was 160.8 MB in the beginning and 158.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.05 ms. Allocated memory is still 201.3 MB. Free memory was 158.6 MB in the beginning and 157.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 405.89 ms. Allocated memory is still 201.3 MB. Free memory was 157.3 MB in the beginning and 136.7 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233405.81 ms. Allocated memory was 201.3 MB in the beginning and 3.2 GB in the end (delta: 3.0 GB). Free memory was 136.0 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.4s, 61 ProgramPointsBefore, 18 ProgramPointsAfterwards, 58 TransitionsBefore, 12 TransitionsAfterwards, 592 CoEnabledTransitionPairs, 7 FixpointIterations, 21 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 3 ConcurrentYvCompositions, 3 ChoiceCompositions, 304 VarBasedMoverChecksPositive, 3 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 3 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 486 CheckedPairsTotal, 51 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.7s, 80 ProgramPointsBefore, 31 ProgramPointsAfterwards, 74 TransitionsBefore, 21 TransitionsAfterwards, 920 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 3 ConcurrentYvCompositions, 4 ChoiceCompositions, 472 VarBasedMoverChecksPositive, 9 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 11 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 942 CheckedPairsTotal, 62 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.8s, 99 ProgramPointsBefore, 41 ProgramPointsAfterwards, 90 TransitionsBefore, 27 TransitionsAfterwards, 1308 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 3 ConcurrentYvCompositions, 5 ChoiceCompositions, 673 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 17 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1426 CheckedPairsTotal, 74 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.5s, 118 ProgramPointsBefore, 51 ProgramPointsAfterwards, 106 TransitionsBefore, 33 TransitionsAfterwards, 1756 CoEnabledTransitionPairs, 7 FixpointIterations, 47 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 840 VarBasedMoverChecksPositive, 18 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 2033 CheckedPairsTotal, 86 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.8s, 137 ProgramPointsBefore, 61 ProgramPointsAfterwards, 122 TransitionsBefore, 39 TransitionsAfterwards, 2264 CoEnabledTransitionPairs, 7 FixpointIterations, 61 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 3 ConcurrentYvCompositions, 7 ChoiceCompositions, 1058 VarBasedMoverChecksPositive, 27 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 30 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 2999 CheckedPairsTotal, 104 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.3s, 156 ProgramPointsBefore, 71 ProgramPointsAfterwards, 138 TransitionsBefore, 45 TransitionsAfterwards, 2832 CoEnabledTransitionPairs, 6 FixpointIterations, 66 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 8 ChoiceCompositions, 1407 VarBasedMoverChecksPositive, 30 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 34 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 3678 CheckedPairsTotal, 113 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 678]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 678). Cancelled while ReachableStatesComputation was computing reachable states (21461 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 1 error locations. Started 6 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 233.0s, OverallIterations: 106, TraceHistogramMax: 6, AutomataDifference: 87.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 15.9s, HoareTripleCheckerStatistics: 4776 SDtfs, 25707 SDslu, 17238 SDs, 0 SdLazy, 32524 SolverSat, 2290 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2850 GetRequests, 712 SyntacticMatches, 0 SemanticMatches, 2138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14735 ImplicationChecksByTransitivity, 22.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37062occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 104.3s AutomataMinimizationTime, 101 MinimizatonAttempts, 2256009 StatesRemovedByMinimization, 93 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 3095 NumberOfCodeBlocks, 3067 NumberOfCodeBlocksAsserted, 181 NumberOfCheckSat, 2858 ConstructedInterpolants, 0 QuantifiedInterpolants, 378712 SizeOfPredicates, 256 NumberOfNonLiveVariables, 5509 ConjunctsInSsa, 400 ConjunctsInUnsatCore, 149 InterpolantComputations, 53 PerfectInterpolantSequences, 912/1688 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