/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 22:51:09,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 22:51:09,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 22:51:09,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 22:51:09,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 22:51:09,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 22:51:09,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 22:51:09,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 22:51:09,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 22:51:09,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 22:51:09,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 22:51:09,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 22:51:09,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 22:51:09,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 22:51:09,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 22:51:09,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 22:51:09,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 22:51:09,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 22:51:09,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 22:51:09,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 22:51:09,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 22:51:09,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 22:51:09,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 22:51:09,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 22:51:09,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 22:51:09,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 22:51:09,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 22:51:09,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 22:51:10,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 22:51:10,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 22:51:10,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 22:51:10,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 22:51:10,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 22:51:10,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 22:51:10,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 22:51:10,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 22:51:10,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 22:51:10,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 22:51:10,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 22:51:10,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 22:51:10,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 22:51:10,013 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 22:51:10,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 22:51:10,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 22:51:10,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 22:51:10,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 22:51:10,037 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 22:51:10,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 22:51:10,038 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 22:51:10,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 22:51:10,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 22:51:10,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 22:51:10,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 22:51:10,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 22:51:10,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 22:51:10,040 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 22:51:10,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 22:51:10,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 22:51:10,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 22:51:10,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 22:51:10,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 22:51:10,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 22:51:10,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 22:51:10,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:51:10,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 22:51:10,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 22:51:10,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 22:51:10,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 22:51:10,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 22:51:10,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 22:51:10,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 22:51:10,325 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 22:51:10,339 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 22:51:10,342 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 22:51:10,344 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 22:51:10,344 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 22:51:10,344 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-loop-bound-2.i [2020-04-17 22:51:10,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9d11fa2e/7c48e3af6dec4a469114c16d71be02d4/FLAGf5f7f8c35 [2020-04-17 22:51:11,073 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 22:51:11,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-loop-bound-2.i [2020-04-17 22:51:11,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9d11fa2e/7c48e3af6dec4a469114c16d71be02d4/FLAGf5f7f8c35 [2020-04-17 22:51:11,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9d11fa2e/7c48e3af6dec4a469114c16d71be02d4 [2020-04-17 22:51:11,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 22:51:11,393 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 22:51:11,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 22:51:11,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 22:51:11,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 22:51:11,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:51:11" (1/1) ... [2020-04-17 22:51:11,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7181dd6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:11, skipping insertion in model container [2020-04-17 22:51:11,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:51:11" (1/1) ... [2020-04-17 22:51:11,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 22:51:11,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 22:51:11,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:51:11,960 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 22:51:12,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:51:12,099 INFO L208 MainTranslator]: Completed translation [2020-04-17 22:51:12,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12 WrapperNode [2020-04-17 22:51:12,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 22:51:12,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 22:51:12,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 22:51:12,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 22:51:12,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (1/1) ... [2020-04-17 22:51:12,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (1/1) ... [2020-04-17 22:51:12,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 22:51:12,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 22:51:12,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 22:51:12,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 22:51:12,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (1/1) ... [2020-04-17 22:51:12,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (1/1) ... [2020-04-17 22:51:12,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (1/1) ... [2020-04-17 22:51:12,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (1/1) ... [2020-04-17 22:51:12,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (1/1) ... [2020-04-17 22:51:12,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (1/1) ... [2020-04-17 22:51:12,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (1/1) ... [2020-04-17 22:51:12,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 22:51:12,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 22:51:12,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 22:51:12,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 22:51:12,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (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 22:51:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-04-17 22:51:12,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-04-17 22:51:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-04-17 22:51:12,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-04-17 22:51:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 22:51:12,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 22:51:12,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 22:51:12,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 22:51:12,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 22:51:12,295 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 22:51:12,745 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 22:51:12,745 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-04-17 22:51:12,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:51:12 BoogieIcfgContainer [2020-04-17 22:51:12,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 22:51:12,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 22:51:12,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 22:51:12,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 22:51:12,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 10:51:11" (1/3) ... [2020-04-17 22:51:12,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6775fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:51:12, skipping insertion in model container [2020-04-17 22:51:12,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:51:12" (2/3) ... [2020-04-17 22:51:12,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6775fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:51:12, skipping insertion in model container [2020-04-17 22:51:12,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:51:12" (3/3) ... [2020-04-17 22:51:12,758 INFO L109 eAbstractionObserver]: Analyzing ICFG nondet-loop-bound-2.i [2020-04-17 22:51:12,769 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 22:51:12,769 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 22:51:12,780 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 22:51:12,782 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 22:51:12,809 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,810 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,810 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,811 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,811 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,811 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,811 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,812 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,812 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,812 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,813 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,813 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,813 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,813 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,814 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,814 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,814 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,818 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,819 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,819 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,819 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,820 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,826 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,826 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,826 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,827 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,827 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,827 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:12,841 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-04-17 22:51:12,861 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:51:12,861 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:51:12,861 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:51:12,862 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:51:12,862 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:51:12,862 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:51:12,862 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:51:12,862 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:51:12,878 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 58 transitions, 126 flow [2020-04-17 22:51:12,880 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 58 transitions, 126 flow [2020-04-17 22:51:12,924 INFO L129 PetriNetUnfolder]: 4/68 cut-off events. [2020-04-17 22:51:12,925 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:51:12,931 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 22:51:12,933 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 58 transitions, 126 flow [2020-04-17 22:51:12,955 INFO L129 PetriNetUnfolder]: 4/68 cut-off events. [2020-04-17 22:51:12,956 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:51:12,957 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 22:51:12,959 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 592 [2020-04-17 22:51:12,960 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:51:14,451 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-04-17 22:51:14,810 WARN L192 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-04-17 22:51:15,013 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-04-17 22:51:15,246 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-04-17 22:51:15,338 INFO L206 etLargeBlockEncoding]: Checked pairs total: 486 [2020-04-17 22:51:15,338 INFO L214 etLargeBlockEncoding]: Total number of compositions: 51 [2020-04-17 22:51:15,342 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 12 transitions, 34 flow [2020-04-17 22:51:15,352 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 22:51:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 22:51:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:51:15,360 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:15,360 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:51:15,361 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:15,367 INFO L82 PathProgramCache]: Analyzing trace with hash 229686, now seen corresponding path program 1 times [2020-04-17 22:51:15,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:15,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103798003] [2020-04-17 22:51:15,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:15,570 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 22:51:15,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103798003] [2020-04-17 22:51:15,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:15,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:51:15,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528136954] [2020-04-17 22:51:15,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:51:15,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:15,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:51:15,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:15,598 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-04-17 22:51:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:15,653 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2020-04-17 22:51:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:51:15,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:51:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:15,666 INFO L225 Difference]: With dead ends: 35 [2020-04-17 22:51:15,666 INFO L226 Difference]: Without dead ends: 31 [2020-04-17 22:51:15,668 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 22:51:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-04-17 22:51:15,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-04-17 22:51:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-04-17 22:51:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 51 transitions. [2020-04-17 22:51:15,701 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 51 transitions. Word has length 3 [2020-04-17 22:51:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:15,701 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 51 transitions. [2020-04-17 22:51:15,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:51:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 51 transitions. [2020-04-17 22:51:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-17 22:51:15,702 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:15,703 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:15,703 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:15,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1647647331, now seen corresponding path program 1 times [2020-04-17 22:51:15,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:15,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004693719] [2020-04-17 22:51:15,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:15,833 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 22:51:15,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004693719] [2020-04-17 22:51:15,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:15,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:51:15,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358181277] [2020-04-17 22:51:15,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:51:15,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:15,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:51:15,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:51:15,838 INFO L87 Difference]: Start difference. First operand 31 states and 51 transitions. Second operand 4 states. [2020-04-17 22:51:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:15,866 INFO L93 Difference]: Finished difference Result 26 states and 42 transitions. [2020-04-17 22:51:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:51:15,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-04-17 22:51:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:15,868 INFO L225 Difference]: With dead ends: 26 [2020-04-17 22:51:15,868 INFO L226 Difference]: Without dead ends: 24 [2020-04-17 22:51:15,869 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 22:51:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-04-17 22:51:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-04-17 22:51:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-04-17 22:51:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 39 transitions. [2020-04-17 22:51:15,875 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 39 transitions. Word has length 7 [2020-04-17 22:51:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:15,876 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 39 transitions. [2020-04-17 22:51:15,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:51:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 39 transitions. [2020-04-17 22:51:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:51:15,877 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:15,877 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:15,877 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 22:51:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:15,878 INFO L82 PathProgramCache]: Analyzing trace with hash -462538936, now seen corresponding path program 1 times [2020-04-17 22:51:15,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:15,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803331563] [2020-04-17 22:51:15,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:15,955 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:51:15,955 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:51:15,955 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:51:15,956 WARN L363 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:51:15,957 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-04-17 22:51:15,965 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,965 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,966 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,966 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,966 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,966 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,966 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,967 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,967 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,967 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,967 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,967 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,967 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,968 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,968 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,968 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,969 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,969 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,969 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,969 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,969 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,970 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,970 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,970 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,971 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,971 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,971 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,971 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,971 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,972 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,972 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,972 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,972 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,972 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,973 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,973 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,973 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,974 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,974 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,975 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,976 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,976 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,976 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,976 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,978 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,978 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,978 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,978 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,979 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,979 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,980 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,980 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,981 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,981 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,981 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,981 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:15,982 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-04-17 22:51:15,983 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:51:15,983 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:51:15,983 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:51:15,983 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:51:15,983 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:51:15,983 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:51:15,984 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:51:15,984 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:51:15,986 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 74 transitions, 172 flow [2020-04-17 22:51:15,986 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 80 places, 74 transitions, 172 flow [2020-04-17 22:51:16,012 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2020-04-17 22:51:16,012 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-04-17 22:51:16,014 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 22:51:16,017 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 80 places, 74 transitions, 172 flow [2020-04-17 22:51:16,046 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2020-04-17 22:51:16,047 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-04-17 22:51:16,053 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 22:51:16,057 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 920 [2020-04-17 22:51:16,057 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:51:17,507 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-04-17 22:51:17,594 INFO L206 etLargeBlockEncoding]: Checked pairs total: 942 [2020-04-17 22:51:17,594 INFO L214 etLargeBlockEncoding]: Total number of compositions: 62 [2020-04-17 22:51:17,595 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 21 transitions, 66 flow [2020-04-17 22:51:17,607 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 224 states. [2020-04-17 22:51:17,607 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states. [2020-04-17 22:51:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:51:17,608 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:17,608 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:51:17,608 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:17,609 INFO L82 PathProgramCache]: Analyzing trace with hash 384194, now seen corresponding path program 1 times [2020-04-17 22:51:17,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:17,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028815207] [2020-04-17 22:51:17,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:17,671 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 22:51:17,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028815207] [2020-04-17 22:51:17,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:17,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:51:17,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952913325] [2020-04-17 22:51:17,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:51:17,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:17,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:51:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:17,675 INFO L87 Difference]: Start difference. First operand 224 states. Second operand 3 states. [2020-04-17 22:51:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:17,722 INFO L93 Difference]: Finished difference Result 185 states and 459 transitions. [2020-04-17 22:51:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:51:17,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:51:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:17,727 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:51:17,727 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 22:51:17,728 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 22:51:17,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 22:51:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-04-17 22:51:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-04-17 22:51:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 418 transitions. [2020-04-17 22:51:17,755 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 418 transitions. Word has length 3 [2020-04-17 22:51:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:17,755 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 418 transitions. [2020-04-17 22:51:17,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:51:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 418 transitions. [2020-04-17 22:51:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:51:17,759 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:17,759 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:17,759 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:17,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1694917346, now seen corresponding path program 1 times [2020-04-17 22:51:17,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:17,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742895248] [2020-04-17 22:51:17,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:17,854 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 22:51:17,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742895248] [2020-04-17 22:51:17,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:17,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:17,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220544800] [2020-04-17 22:51:17,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:17,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:17,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:17,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:17,857 INFO L87 Difference]: Start difference. First operand 171 states and 418 transitions. Second operand 5 states. [2020-04-17 22:51:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:17,954 INFO L93 Difference]: Finished difference Result 205 states and 460 transitions. [2020-04-17 22:51:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:17,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 22:51:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:17,958 INFO L225 Difference]: With dead ends: 205 [2020-04-17 22:51:17,958 INFO L226 Difference]: Without dead ends: 201 [2020-04-17 22:51:17,958 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 22:51:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-04-17 22:51:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 162. [2020-04-17 22:51:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 22:51:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-04-17 22:51:17,979 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 9 [2020-04-17 22:51:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:17,979 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-04-17 22:51:17,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-04-17 22:51:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:51:17,981 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:17,981 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:17,981 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:17,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1027741454, now seen corresponding path program 1 times [2020-04-17 22:51:17,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:17,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532338294] [2020-04-17 22:51:17,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:18,054 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 22:51:18,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532338294] [2020-04-17 22:51:18,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:18,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:18,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678687664] [2020-04-17 22:51:18,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:18,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:18,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:18,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:18,057 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 5 states. [2020-04-17 22:51:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:18,154 INFO L93 Difference]: Finished difference Result 189 states and 423 transitions. [2020-04-17 22:51:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:18,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-17 22:51:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:18,158 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:51:18,158 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 22:51:18,159 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 22:51:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 22:51:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 153. [2020-04-17 22:51:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-04-17 22:51:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 367 transitions. [2020-04-17 22:51:18,192 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 367 transitions. Word has length 13 [2020-04-17 22:51:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:18,193 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 367 transitions. [2020-04-17 22:51:18,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 367 transitions. [2020-04-17 22:51:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:51:18,195 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:18,195 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:18,195 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:51:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:18,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1792799235, now seen corresponding path program 1 times [2020-04-17 22:51:18,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:18,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479914737] [2020-04-17 22:51:18,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:18,229 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:51:18,229 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:51:18,230 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:51:18,230 WARN L363 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:51:18,232 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-04-17 22:51:18,242 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,242 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,242 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,242 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,243 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,243 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,243 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,243 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,243 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,244 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,244 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,244 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,244 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,244 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,244 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,245 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,245 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,245 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,245 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,245 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,245 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,246 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,246 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,246 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,246 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,247 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,247 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,247 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,247 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,247 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,247 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,248 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,248 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,248 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,248 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,249 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,249 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,249 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,249 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,249 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,249 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,250 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,250 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,250 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,250 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,251 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,251 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,251 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,251 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,251 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,252 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,252 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,252 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,252 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,253 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,253 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,254 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,254 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,254 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,255 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,255 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,256 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,256 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,256 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,257 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,257 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,258 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,258 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,258 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,259 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,259 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,259 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,260 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,260 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,261 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,261 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,261 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,261 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,262 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,262 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,263 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,263 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,263 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,263 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:18,265 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-04-17 22:51:18,266 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:51:18,266 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:51:18,266 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:51:18,266 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:51:18,266 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:51:18,266 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:51:18,266 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:51:18,266 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:51:18,268 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 90 transitions, 222 flow [2020-04-17 22:51:18,269 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 90 transitions, 222 flow [2020-04-17 22:51:18,284 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2020-04-17 22:51:18,284 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-04-17 22:51:18,285 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 22:51:18,288 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 90 transitions, 222 flow [2020-04-17 22:51:18,300 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2020-04-17 22:51:18,301 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-04-17 22:51:18,302 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 22:51:18,304 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1308 [2020-04-17 22:51:18,304 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:51:19,806 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-04-17 22:51:20,061 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-04-17 22:51:20,147 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1426 [2020-04-17 22:51:20,147 INFO L214 etLargeBlockEncoding]: Total number of compositions: 74 [2020-04-17 22:51:20,147 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 27 transitions, 96 flow [2020-04-17 22:51:20,175 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 683 states. [2020-04-17 22:51:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states. [2020-04-17 22:51:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:51:20,176 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:20,176 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:51:20,176 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 22:51:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:20,177 INFO L82 PathProgramCache]: Analyzing trace with hash 567457, now seen corresponding path program 1 times [2020-04-17 22:51:20,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:20,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420427784] [2020-04-17 22:51:20,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:20,214 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 22:51:20,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420427784] [2020-04-17 22:51:20,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:20,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:51:20,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268703223] [2020-04-17 22:51:20,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:51:20,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:20,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:51:20,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:20,219 INFO L87 Difference]: Start difference. First operand 683 states. Second operand 3 states. [2020-04-17 22:51:20,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:20,249 INFO L93 Difference]: Finished difference Result 600 states and 1886 transitions. [2020-04-17 22:51:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:51:20,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:51:20,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:20,256 INFO L225 Difference]: With dead ends: 600 [2020-04-17 22:51:20,256 INFO L226 Difference]: Without dead ends: 559 [2020-04-17 22:51:20,257 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 22:51:20,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-04-17 22:51:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2020-04-17 22:51:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-04-17 22:51:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1737 transitions. [2020-04-17 22:51:20,311 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1737 transitions. Word has length 3 [2020-04-17 22:51:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:20,311 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 1737 transitions. [2020-04-17 22:51:20,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:51:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1737 transitions. [2020-04-17 22:51:20,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:51:20,312 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:20,312 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:20,312 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 22:51:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1052273544, now seen corresponding path program 1 times [2020-04-17 22:51:20,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:20,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16256988] [2020-04-17 22:51:20,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:20,368 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 22:51:20,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16256988] [2020-04-17 22:51:20,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:20,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:20,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018055747] [2020-04-17 22:51:20,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:20,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:20,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:20,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:20,371 INFO L87 Difference]: Start difference. First operand 559 states and 1737 transitions. Second operand 5 states. [2020-04-17 22:51:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:20,472 INFO L93 Difference]: Finished difference Result 817 states and 2317 transitions. [2020-04-17 22:51:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:20,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 22:51:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:20,481 INFO L225 Difference]: With dead ends: 817 [2020-04-17 22:51:20,481 INFO L226 Difference]: Without dead ends: 812 [2020-04-17 22:51:20,482 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 22:51:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-04-17 22:51:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 585. [2020-04-17 22:51:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-04-17 22:51:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1832 transitions. [2020-04-17 22:51:20,518 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1832 transitions. Word has length 9 [2020-04-17 22:51:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:20,518 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 1832 transitions. [2020-04-17 22:51:20,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1832 transitions. [2020-04-17 22:51:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:51:20,520 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:20,520 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:20,520 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 22:51:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1096280394, now seen corresponding path program 1 times [2020-04-17 22:51:20,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:20,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20272445] [2020-04-17 22:51:20,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:20,579 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 22:51:20,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20272445] [2020-04-17 22:51:20,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:20,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:20,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067698523] [2020-04-17 22:51:20,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:20,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:20,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:20,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:20,582 INFO L87 Difference]: Start difference. First operand 585 states and 1832 transitions. Second operand 5 states. [2020-04-17 22:51:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:20,693 INFO L93 Difference]: Finished difference Result 843 states and 2406 transitions. [2020-04-17 22:51:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:20,693 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-17 22:51:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:20,699 INFO L225 Difference]: With dead ends: 843 [2020-04-17 22:51:20,700 INFO L226 Difference]: Without dead ends: 836 [2020-04-17 22:51:20,700 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 22:51:20,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2020-04-17 22:51:20,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 611. [2020-04-17 22:51:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-04-17 22:51:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1906 transitions. [2020-04-17 22:51:20,729 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1906 transitions. Word has length 13 [2020-04-17 22:51:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:20,730 INFO L479 AbstractCegarLoop]: Abstraction has 611 states and 1906 transitions. [2020-04-17 22:51:20,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1906 transitions. [2020-04-17 22:51:20,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:20,731 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:20,732 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:20,732 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 22:51:20,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:20,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2044985054, now seen corresponding path program 1 times [2020-04-17 22:51:20,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:20,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650122246] [2020-04-17 22:51:20,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:20,849 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 22:51:20,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650122246] [2020-04-17 22:51:20,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669115321] [2020-04-17 22:51:20,851 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 22:51:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:20,936 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:20,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:21,017 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 22:51:21,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:21,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:21,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007333541] [2020-04-17 22:51:21,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:21,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:21,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:21,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:21,020 INFO L87 Difference]: Start difference. First operand 611 states and 1906 transitions. Second operand 12 states. [2020-04-17 22:51:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:21,322 INFO L93 Difference]: Finished difference Result 1059 states and 2818 transitions. [2020-04-17 22:51:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:21,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 22:51:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:21,330 INFO L225 Difference]: With dead ends: 1059 [2020-04-17 22:51:21,330 INFO L226 Difference]: Without dead ends: 1052 [2020-04-17 22:51:21,331 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 22:51:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2020-04-17 22:51:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 591. [2020-04-17 22:51:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-04-17 22:51:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1840 transitions. [2020-04-17 22:51:21,359 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1840 transitions. Word has length 15 [2020-04-17 22:51:21,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:21,359 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 1840 transitions. [2020-04-17 22:51:21,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1840 transitions. [2020-04-17 22:51:21,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:21,360 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:21,361 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:21,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:21,573 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 22:51:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:21,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1258473782, now seen corresponding path program 2 times [2020-04-17 22:51:21,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:21,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624573695] [2020-04-17 22:51:21,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:21,626 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 22:51:21,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624573695] [2020-04-17 22:51:21,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:21,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:21,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616209599] [2020-04-17 22:51:21,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:21,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:21,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:21,628 INFO L87 Difference]: Start difference. First operand 591 states and 1840 transitions. Second operand 7 states. [2020-04-17 22:51:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:21,858 INFO L93 Difference]: Finished difference Result 1053 states and 2807 transitions. [2020-04-17 22:51:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:21,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-04-17 22:51:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:21,865 INFO L225 Difference]: With dead ends: 1053 [2020-04-17 22:51:21,866 INFO L226 Difference]: Without dead ends: 1045 [2020-04-17 22:51:21,866 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 22:51:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-04-17 22:51:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 536. [2020-04-17 22:51:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 536 states. [2020-04-17 22:51:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1688 transitions. [2020-04-17 22:51:21,891 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1688 transitions. Word has length 15 [2020-04-17 22:51:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:21,891 INFO L479 AbstractCegarLoop]: Abstraction has 536 states and 1688 transitions. [2020-04-17 22:51:21,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1688 transitions. [2020-04-17 22:51:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:51:21,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:21,892 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:21,893 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 22:51:21,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:21,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1734594488, now seen corresponding path program 1 times [2020-04-17 22:51:21,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:21,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310774363] [2020-04-17 22:51:21,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:21,970 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 22:51:21,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310774363] [2020-04-17 22:51:21,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:21,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:21,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931649212] [2020-04-17 22:51:21,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:21,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:21,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:21,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:21,974 INFO L87 Difference]: Start difference. First operand 536 states and 1688 transitions. Second operand 5 states. [2020-04-17 22:51:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:22,063 INFO L93 Difference]: Finished difference Result 736 states and 2123 transitions. [2020-04-17 22:51:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:22,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-04-17 22:51:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:22,068 INFO L225 Difference]: With dead ends: 736 [2020-04-17 22:51:22,069 INFO L226 Difference]: Without dead ends: 728 [2020-04-17 22:51:22,069 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 22:51:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-04-17 22:51:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 549. [2020-04-17 22:51:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-04-17 22:51:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1684 transitions. [2020-04-17 22:51:22,088 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1684 transitions. Word has length 17 [2020-04-17 22:51:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:22,088 INFO L479 AbstractCegarLoop]: Abstraction has 549 states and 1684 transitions. [2020-04-17 22:51:22,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1684 transitions. [2020-04-17 22:51:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 22:51:22,090 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:22,090 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:22,090 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 22:51:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2065233823, now seen corresponding path program 1 times [2020-04-17 22:51:22,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:22,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243707478] [2020-04-17 22:51:22,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:22,139 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:51:22,139 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:51:22,139 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:51:22,140 WARN L363 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:51:22,141 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-04-17 22:51:22,155 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,155 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,155 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,156 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,156 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,156 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,156 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,156 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,156 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,157 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,157 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,157 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,157 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,157 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,157 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,158 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,158 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,158 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,158 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,158 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,158 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,158 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,159 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,159 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,159 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,159 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,159 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,159 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,160 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,160 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,160 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,160 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,160 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,160 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,160 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,161 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,161 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,161 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,161 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,161 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,161 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,161 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,162 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,162 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,162 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,162 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,162 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,162 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,163 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,163 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,163 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,163 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,163 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,163 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,163 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,164 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,164 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,164 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,164 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,164 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,164 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,165 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,165 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,165 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,165 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,165 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,165 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,165 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,166 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,166 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,166 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,166 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,166 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,168 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,168 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,168 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,168 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,168 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,170 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,170 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,170 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,170 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,170 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,172 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,172 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,172 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,172 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,172 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,174 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,174 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,174 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,174 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,175 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,175 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,176 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,176 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,176 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,176 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,177 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,177 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,178 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,178 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,178 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,178 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,179 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,179 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,181 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,182 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,182 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,182 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,182 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,182 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:22,183 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-04-17 22:51:22,184 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:51:22,184 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:51:22,184 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:51:22,184 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:51:22,184 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:51:22,184 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:51:22,184 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:51:22,184 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:51:22,186 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 106 transitions, 276 flow [2020-04-17 22:51:22,186 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 118 places, 106 transitions, 276 flow [2020-04-17 22:51:22,199 INFO L129 PetriNetUnfolder]: 7/131 cut-off events. [2020-04-17 22:51:22,200 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-04-17 22:51:22,201 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 22:51:22,204 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 118 places, 106 transitions, 276 flow [2020-04-17 22:51:22,217 INFO L129 PetriNetUnfolder]: 7/131 cut-off events. [2020-04-17 22:51:22,217 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-04-17 22:51:22,218 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 22:51:22,221 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1756 [2020-04-17 22:51:22,221 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:51:24,384 WARN L192 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-04-17 22:51:24,583 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-04-17 22:51:24,679 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2033 [2020-04-17 22:51:24,679 INFO L214 etLargeBlockEncoding]: Total number of compositions: 86 [2020-04-17 22:51:24,679 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 33 transitions, 130 flow [2020-04-17 22:51:24,795 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2060 states. [2020-04-17 22:51:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states. [2020-04-17 22:51:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:51:24,795 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:24,796 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:51:24,796 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 22:51:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash 779528, now seen corresponding path program 1 times [2020-04-17 22:51:24,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:24,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681989676] [2020-04-17 22:51:24,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:24,847 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 22:51:24,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681989676] [2020-04-17 22:51:24,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:24,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:51:24,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124727818] [2020-04-17 22:51:24,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:51:24,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:24,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:51:24,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:24,853 INFO L87 Difference]: Start difference. First operand 2060 states. Second operand 3 states. [2020-04-17 22:51:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:24,894 INFO L93 Difference]: Finished difference Result 1889 states and 7217 transitions. [2020-04-17 22:51:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:51:24,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:51:24,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:24,909 INFO L225 Difference]: With dead ends: 1889 [2020-04-17 22:51:24,909 INFO L226 Difference]: Without dead ends: 1767 [2020-04-17 22:51:24,910 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 22:51:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2020-04-17 22:51:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1767. [2020-04-17 22:51:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1767 states. [2020-04-17 22:51:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 6690 transitions. [2020-04-17 22:51:24,989 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 6690 transitions. Word has length 3 [2020-04-17 22:51:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:24,990 INFO L479 AbstractCegarLoop]: Abstraction has 1767 states and 6690 transitions. [2020-04-17 22:51:24,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:51:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 6690 transitions. [2020-04-17 22:51:24,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:51:24,990 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:24,990 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:24,991 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 22:51:24,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:24,991 INFO L82 PathProgramCache]: Analyzing trace with hash -666106918, now seen corresponding path program 1 times [2020-04-17 22:51:24,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:24,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886882614] [2020-04-17 22:51:24,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:25,036 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 22:51:25,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886882614] [2020-04-17 22:51:25,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:25,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:25,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783690861] [2020-04-17 22:51:25,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:25,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:25,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:25,038 INFO L87 Difference]: Start difference. First operand 1767 states and 6690 transitions. Second operand 5 states. [2020-04-17 22:51:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:25,180 INFO L93 Difference]: Finished difference Result 2905 states and 10138 transitions. [2020-04-17 22:51:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:25,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 22:51:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:25,205 INFO L225 Difference]: With dead ends: 2905 [2020-04-17 22:51:25,205 INFO L226 Difference]: Without dead ends: 2899 [2020-04-17 22:51:25,205 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 22:51:25,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2020-04-17 22:51:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 1966. [2020-04-17 22:51:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1966 states. [2020-04-17 22:51:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7503 transitions. [2020-04-17 22:51:25,310 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7503 transitions. Word has length 9 [2020-04-17 22:51:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:25,310 INFO L479 AbstractCegarLoop]: Abstraction has 1966 states and 7503 transitions. [2020-04-17 22:51:25,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7503 transitions. [2020-04-17 22:51:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:51:25,311 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:25,311 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:25,311 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 22:51:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1766896000, now seen corresponding path program 1 times [2020-04-17 22:51:25,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:25,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914702852] [2020-04-17 22:51:25,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:25,347 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 22:51:25,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914702852] [2020-04-17 22:51:25,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:25,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:25,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379693141] [2020-04-17 22:51:25,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:25,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:25,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:25,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:25,349 INFO L87 Difference]: Start difference. First operand 1966 states and 7503 transitions. Second operand 5 states. [2020-04-17 22:51:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:25,456 INFO L93 Difference]: Finished difference Result 3204 states and 11312 transitions. [2020-04-17 22:51:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:25,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-17 22:51:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:25,484 INFO L225 Difference]: With dead ends: 3204 [2020-04-17 22:51:25,484 INFO L226 Difference]: Without dead ends: 3194 [2020-04-17 22:51:25,484 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 22:51:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-04-17 22:51:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 2200. [2020-04-17 22:51:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2200 states. [2020-04-17 22:51:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 8453 transitions. [2020-04-17 22:51:25,589 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 8453 transitions. Word has length 13 [2020-04-17 22:51:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:25,589 INFO L479 AbstractCegarLoop]: Abstraction has 2200 states and 8453 transitions. [2020-04-17 22:51:25,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 8453 transitions. [2020-04-17 22:51:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:25,590 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:25,591 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:25,591 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 22:51:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:25,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1022394712, now seen corresponding path program 1 times [2020-04-17 22:51:25,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:25,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161342144] [2020-04-17 22:51:25,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:25,644 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 22:51:25,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161342144] [2020-04-17 22:51:25,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837736161] [2020-04-17 22:51:25,645 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 22:51:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:25,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:25,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:25,775 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 22:51:25,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:25,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:25,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149226027] [2020-04-17 22:51:25,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:25,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:25,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:25,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:25,777 INFO L87 Difference]: Start difference. First operand 2200 states and 8453 transitions. Second operand 12 states. [2020-04-17 22:51:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:26,120 INFO L93 Difference]: Finished difference Result 4556 states and 14911 transitions. [2020-04-17 22:51:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:26,121 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 22:51:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:26,154 INFO L225 Difference]: With dead ends: 4556 [2020-04-17 22:51:26,154 INFO L226 Difference]: Without dead ends: 4546 [2020-04-17 22:51:26,154 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 22:51:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2020-04-17 22:51:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 2157. [2020-04-17 22:51:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2157 states. [2020-04-17 22:51:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 8278 transitions. [2020-04-17 22:51:26,336 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 8278 transitions. Word has length 15 [2020-04-17 22:51:26,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:26,337 INFO L479 AbstractCegarLoop]: Abstraction has 2157 states and 8278 transitions. [2020-04-17 22:51:26,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:26,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 8278 transitions. [2020-04-17 22:51:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:26,338 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:26,338 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:26,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:26,541 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 22:51:26,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:26,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1474969304, now seen corresponding path program 2 times [2020-04-17 22:51:26,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:26,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791759974] [2020-04-17 22:51:26,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:26,606 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 22:51:26,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791759974] [2020-04-17 22:51:26,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:26,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:26,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774248142] [2020-04-17 22:51:26,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:26,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:26,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:26,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:26,610 INFO L87 Difference]: Start difference. First operand 2157 states and 8278 transitions. Second operand 7 states. [2020-04-17 22:51:26,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:26,905 INFO L93 Difference]: Finished difference Result 4612 states and 15111 transitions. [2020-04-17 22:51:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:26,905 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-04-17 22:51:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:26,927 INFO L225 Difference]: With dead ends: 4612 [2020-04-17 22:51:26,927 INFO L226 Difference]: Without dead ends: 4601 [2020-04-17 22:51:26,929 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 22:51:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2020-04-17 22:51:27,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 2035. [2020-04-17 22:51:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2035 states. [2020-04-17 22:51:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 7845 transitions. [2020-04-17 22:51:27,039 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 7845 transitions. Word has length 15 [2020-04-17 22:51:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:27,039 INFO L479 AbstractCegarLoop]: Abstraction has 2035 states and 7845 transitions. [2020-04-17 22:51:27,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:27,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 7845 transitions. [2020-04-17 22:51:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:51:27,041 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:27,041 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:27,041 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 22:51:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:27,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1278978660, now seen corresponding path program 1 times [2020-04-17 22:51:27,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:27,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316577742] [2020-04-17 22:51:27,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:27,093 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 22:51:27,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316577742] [2020-04-17 22:51:27,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:27,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:27,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076377010] [2020-04-17 22:51:27,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:27,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:27,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:27,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:27,095 INFO L87 Difference]: Start difference. First operand 2035 states and 7845 transitions. Second operand 5 states. [2020-04-17 22:51:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:27,202 INFO L93 Difference]: Finished difference Result 3265 states and 11681 transitions. [2020-04-17 22:51:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:27,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-04-17 22:51:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:27,215 INFO L225 Difference]: With dead ends: 3265 [2020-04-17 22:51:27,215 INFO L226 Difference]: Without dead ends: 3250 [2020-04-17 22:51:27,216 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 22:51:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-04-17 22:51:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2281. [2020-04-17 22:51:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2281 states. [2020-04-17 22:51:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 8755 transitions. [2020-04-17 22:51:27,301 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 8755 transitions. Word has length 17 [2020-04-17 22:51:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:27,301 INFO L479 AbstractCegarLoop]: Abstraction has 2281 states and 8755 transitions. [2020-04-17 22:51:27,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 8755 transitions. [2020-04-17 22:51:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:27,303 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:27,303 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:27,303 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 22:51:27,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:27,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1455436228, now seen corresponding path program 1 times [2020-04-17 22:51:27,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:27,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745466544] [2020-04-17 22:51:27,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:27,375 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 22:51:27,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745466544] [2020-04-17 22:51:27,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626019490] [2020-04-17 22:51:27,376 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 22:51:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:27,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:27,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:27,537 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 22:51:27,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:27,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:27,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552745375] [2020-04-17 22:51:27,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:27,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:27,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:27,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:27,544 INFO L87 Difference]: Start difference. First operand 2281 states and 8755 transitions. Second operand 12 states. [2020-04-17 22:51:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:28,011 INFO L93 Difference]: Finished difference Result 4825 states and 15986 transitions. [2020-04-17 22:51:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:28,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:51:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:28,027 INFO L225 Difference]: With dead ends: 4825 [2020-04-17 22:51:28,028 INFO L226 Difference]: Without dead ends: 4813 [2020-04-17 22:51:28,028 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 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 22:51:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4813 states. [2020-04-17 22:51:28,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4813 to 2305. [2020-04-17 22:51:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2305 states. [2020-04-17 22:51:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 8815 transitions. [2020-04-17 22:51:28,141 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 8815 transitions. Word has length 19 [2020-04-17 22:51:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:28,142 INFO L479 AbstractCegarLoop]: Abstraction has 2305 states and 8815 transitions. [2020-04-17 22:51:28,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 8815 transitions. [2020-04-17 22:51:28,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:28,143 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:28,143 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:28,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:28,350 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 22:51:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash -979473248, now seen corresponding path program 1 times [2020-04-17 22:51:28,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:28,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490860351] [2020-04-17 22:51:28,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:28,412 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 22:51:28,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490860351] [2020-04-17 22:51:28,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032214013] [2020-04-17 22:51:28,413 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 22:51:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:28,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:28,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:28,574 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 22:51:28,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:28,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:28,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374208482] [2020-04-17 22:51:28,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:28,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:28,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:28,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:28,576 INFO L87 Difference]: Start difference. First operand 2305 states and 8815 transitions. Second operand 12 states. [2020-04-17 22:51:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:29,068 INFO L93 Difference]: Finished difference Result 4942 states and 16410 transitions. [2020-04-17 22:51:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:29,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:51:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:29,086 INFO L225 Difference]: With dead ends: 4942 [2020-04-17 22:51:29,086 INFO L226 Difference]: Without dead ends: 4925 [2020-04-17 22:51:29,087 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 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 22:51:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2020-04-17 22:51:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 2299. [2020-04-17 22:51:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-04-17 22:51:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 8782 transitions. [2020-04-17 22:51:29,196 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 8782 transitions. Word has length 19 [2020-04-17 22:51:29,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:29,196 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 8782 transitions. [2020-04-17 22:51:29,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 8782 transitions. [2020-04-17 22:51:29,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:29,198 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:29,198 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:29,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:29,402 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 22:51:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash -737855584, now seen corresponding path program 2 times [2020-04-17 22:51:29,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:29,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509663305] [2020-04-17 22:51:29,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:29,465 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 22:51:29,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509663305] [2020-04-17 22:51:29,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:29,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:29,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623272613] [2020-04-17 22:51:29,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:29,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:29,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:29,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:29,467 INFO L87 Difference]: Start difference. First operand 2299 states and 8782 transitions. Second operand 7 states. [2020-04-17 22:51:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:29,758 INFO L93 Difference]: Finished difference Result 4934 states and 16393 transitions. [2020-04-17 22:51:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:29,759 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:51:29,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:29,775 INFO L225 Difference]: With dead ends: 4934 [2020-04-17 22:51:29,776 INFO L226 Difference]: Without dead ends: 4917 [2020-04-17 22:51:29,776 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 22:51:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4917 states. [2020-04-17 22:51:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4917 to 2216. [2020-04-17 22:51:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2216 states. [2020-04-17 22:51:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 8477 transitions. [2020-04-17 22:51:29,934 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 8477 transitions. Word has length 19 [2020-04-17 22:51:29,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:29,934 INFO L479 AbstractCegarLoop]: Abstraction has 2216 states and 8477 transitions. [2020-04-17 22:51:29,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 8477 transitions. [2020-04-17 22:51:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:29,936 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:29,936 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:29,936 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 22:51:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash -737840828, now seen corresponding path program 2 times [2020-04-17 22:51:29,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:29,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773278870] [2020-04-17 22:51:29,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:29,989 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 22:51:29,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773278870] [2020-04-17 22:51:29,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:29,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:29,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273646156] [2020-04-17 22:51:29,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:29,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:29,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:29,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:29,991 INFO L87 Difference]: Start difference. First operand 2216 states and 8477 transitions. Second operand 7 states. [2020-04-17 22:51:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:30,261 INFO L93 Difference]: Finished difference Result 4774 states and 15828 transitions. [2020-04-17 22:51:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:30,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:51:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:30,278 INFO L225 Difference]: With dead ends: 4774 [2020-04-17 22:51:30,279 INFO L226 Difference]: Without dead ends: 4757 [2020-04-17 22:51:30,279 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 22:51:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4757 states. [2020-04-17 22:51:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4757 to 2150. [2020-04-17 22:51:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2150 states. [2020-04-17 22:51:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 8243 transitions. [2020-04-17 22:51:30,372 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 8243 transitions. Word has length 19 [2020-04-17 22:51:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:30,373 INFO L479 AbstractCegarLoop]: Abstraction has 2150 states and 8243 transitions. [2020-04-17 22:51:30,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 8243 transitions. [2020-04-17 22:51:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:30,375 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:30,375 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 22:51:30,375 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 22:51:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:30,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1726751032, now seen corresponding path program 1 times [2020-04-17 22:51:30,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:30,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677068557] [2020-04-17 22:51:30,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:30,452 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 22:51:30,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677068557] [2020-04-17 22:51:30,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132479407] [2020-04-17 22:51:30,452 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 22:51:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:30,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:30,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:30,619 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 22:51:30,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:30,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:30,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138134147] [2020-04-17 22:51:30,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:30,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:30,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:30,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:30,621 INFO L87 Difference]: Start difference. First operand 2150 states and 8243 transitions. Second operand 16 states. [2020-04-17 22:51:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:31,403 INFO L93 Difference]: Finished difference Result 6025 states and 18746 transitions. [2020-04-17 22:51:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:31,403 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:31,416 INFO L225 Difference]: With dead ends: 6025 [2020-04-17 22:51:31,416 INFO L226 Difference]: Without dead ends: 6017 [2020-04-17 22:51:31,417 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 22:51:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2020-04-17 22:51:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 2117. [2020-04-17 22:51:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2117 states. [2020-04-17 22:51:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 8106 transitions. [2020-04-17 22:51:31,583 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 8106 transitions. Word has length 21 [2020-04-17 22:51:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:31,584 INFO L479 AbstractCegarLoop]: Abstraction has 2117 states and 8106 transitions. [2020-04-17 22:51:31,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 8106 transitions. [2020-04-17 22:51:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:31,586 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:31,586 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 22:51:31,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:31,791 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 22:51:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:31,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1485133368, now seen corresponding path program 2 times [2020-04-17 22:51:31,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:31,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963768010] [2020-04-17 22:51:31,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:31,861 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 22:51:31,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963768010] [2020-04-17 22:51:31,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691883895] [2020-04-17 22:51:31,862 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 22:51:31,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:51:31,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:31,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:31,947 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:32,037 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 22:51:32,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:32,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:32,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508664395] [2020-04-17 22:51:32,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:32,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:32,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:32,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:32,039 INFO L87 Difference]: Start difference. First operand 2117 states and 8106 transitions. Second operand 16 states. [2020-04-17 22:51:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:32,836 INFO L93 Difference]: Finished difference Result 5914 states and 18384 transitions. [2020-04-17 22:51:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:32,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:32,846 INFO L225 Difference]: With dead ends: 5914 [2020-04-17 22:51:32,846 INFO L226 Difference]: Without dead ends: 5903 [2020-04-17 22:51:32,847 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 22:51:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5903 states. [2020-04-17 22:51:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5903 to 2085. [2020-04-17 22:51:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2085 states. [2020-04-17 22:51:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 7975 transitions. [2020-04-17 22:51:32,939 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 7975 transitions. Word has length 21 [2020-04-17 22:51:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:32,939 INFO L479 AbstractCegarLoop]: Abstraction has 2085 states and 7975 transitions. [2020-04-17 22:51:32,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 7975 transitions. [2020-04-17 22:51:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:32,942 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:32,942 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 22:51:33,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:33,147 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 22:51:33,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:33,147 INFO L82 PathProgramCache]: Analyzing trace with hash -268549816, now seen corresponding path program 3 times [2020-04-17 22:51:33,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:33,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931834974] [2020-04-17 22:51:33,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:33,268 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 22:51:33,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931834974] [2020-04-17 22:51:33,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892870907] [2020-04-17 22:51:33,269 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 22:51:33,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:51:33,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:33,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:33,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:33,444 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 22:51:33,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:33,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:33,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124380878] [2020-04-17 22:51:33,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:33,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:33,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:33,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:33,446 INFO L87 Difference]: Start difference. First operand 2085 states and 7975 transitions. Second operand 16 states. [2020-04-17 22:51:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:34,306 INFO L93 Difference]: Finished difference Result 5907 states and 18375 transitions. [2020-04-17 22:51:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:34,306 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:34,319 INFO L225 Difference]: With dead ends: 5907 [2020-04-17 22:51:34,319 INFO L226 Difference]: Without dead ends: 5899 [2020-04-17 22:51:34,320 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5899 states. [2020-04-17 22:51:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5899 to 2008. [2020-04-17 22:51:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2008 states. [2020-04-17 22:51:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7698 transitions. [2020-04-17 22:51:34,407 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7698 transitions. Word has length 21 [2020-04-17 22:51:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:34,408 INFO L479 AbstractCegarLoop]: Abstraction has 2008 states and 7698 transitions. [2020-04-17 22:51:34,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7698 transitions. [2020-04-17 22:51:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:34,410 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:34,410 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 22:51:34,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:34,623 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 22:51:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash -675948728, now seen corresponding path program 4 times [2020-04-17 22:51:34,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:34,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998696506] [2020-04-17 22:51:34,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:34,703 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 22:51:34,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998696506] [2020-04-17 22:51:34,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077333525] [2020-04-17 22:51:34,704 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 22:51:34,776 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:51:34,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:34,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:34,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:34,904 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 22:51:34,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:34,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:34,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947432025] [2020-04-17 22:51:34,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:34,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:34,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:34,906 INFO L87 Difference]: Start difference. First operand 2008 states and 7698 transitions. Second operand 16 states. [2020-04-17 22:51:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:35,764 INFO L93 Difference]: Finished difference Result 5835 states and 18155 transitions. [2020-04-17 22:51:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:35,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:35,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:35,773 INFO L225 Difference]: With dead ends: 5835 [2020-04-17 22:51:35,774 INFO L226 Difference]: Without dead ends: 5824 [2020-04-17 22:51:35,774 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5824 states. [2020-04-17 22:51:35,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5824 to 1976. [2020-04-17 22:51:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1976 states. [2020-04-17 22:51:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 7567 transitions. [2020-04-17 22:51:35,980 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 7567 transitions. Word has length 21 [2020-04-17 22:51:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:35,980 INFO L479 AbstractCegarLoop]: Abstraction has 1976 states and 7567 transitions. [2020-04-17 22:51:35,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 7567 transitions. [2020-04-17 22:51:35,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:35,982 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:35,982 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 22:51:36,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:36,183 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 22:51:36,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:36,184 INFO L82 PathProgramCache]: Analyzing trace with hash -409607608, now seen corresponding path program 5 times [2020-04-17 22:51:36,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:36,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006977736] [2020-04-17 22:51:36,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:36,286 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 22:51:36,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006977736] [2020-04-17 22:51:36,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:36,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:51:36,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92871136] [2020-04-17 22:51:36,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:51:36,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:36,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:51:36,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:51:36,288 INFO L87 Difference]: Start difference. First operand 1976 states and 7567 transitions. Second operand 9 states. [2020-04-17 22:51:36,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:36,928 INFO L93 Difference]: Finished difference Result 5820 states and 18126 transitions. [2020-04-17 22:51:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:36,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:51:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:36,937 INFO L225 Difference]: With dead ends: 5820 [2020-04-17 22:51:36,937 INFO L226 Difference]: Without dead ends: 5812 [2020-04-17 22:51:36,938 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 22:51:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2020-04-17 22:51:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 1907. [2020-04-17 22:51:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1907 states. [2020-04-17 22:51:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 7310 transitions. [2020-04-17 22:51:37,003 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 7310 transitions. Word has length 21 [2020-04-17 22:51:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:37,003 INFO L479 AbstractCegarLoop]: Abstraction has 1907 states and 7310 transitions. [2020-04-17 22:51:37,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:51:37,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 7310 transitions. [2020-04-17 22:51:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:37,005 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:37,006 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 22:51:37,006 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 22:51:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:37,007 INFO L82 PathProgramCache]: Analyzing trace with hash -395441848, now seen corresponding path program 6 times [2020-04-17 22:51:37,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:37,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995209684] [2020-04-17 22:51:37,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:37,080 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 22:51:37,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995209684] [2020-04-17 22:51:37,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:37,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:51:37,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088913090] [2020-04-17 22:51:37,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:51:37,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:37,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:51:37,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:51:37,082 INFO L87 Difference]: Start difference. First operand 1907 states and 7310 transitions. Second operand 9 states. [2020-04-17 22:51:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:37,716 INFO L93 Difference]: Finished difference Result 5717 states and 17784 transitions. [2020-04-17 22:51:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:37,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:51:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:37,725 INFO L225 Difference]: With dead ends: 5717 [2020-04-17 22:51:37,726 INFO L226 Difference]: Without dead ends: 5705 [2020-04-17 22:51:37,726 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:51:37,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2020-04-17 22:51:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 1800. [2020-04-17 22:51:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-04-17 22:51:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 6961 transitions. [2020-04-17 22:51:37,812 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 6961 transitions. Word has length 21 [2020-04-17 22:51:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:37,812 INFO L479 AbstractCegarLoop]: Abstraction has 1800 states and 6961 transitions. [2020-04-17 22:51:37,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:51:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 6961 transitions. [2020-04-17 22:51:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:37,814 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:37,814 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:37,814 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 22:51:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:37,815 INFO L82 PathProgramCache]: Analyzing trace with hash -334654421, now seen corresponding path program 1 times [2020-04-17 22:51:37,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:37,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987361206] [2020-04-17 22:51:37,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:37,870 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 22:51:37,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987361206] [2020-04-17 22:51:37,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:37,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:37,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358831035] [2020-04-17 22:51:37,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:37,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:37,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:37,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:37,872 INFO L87 Difference]: Start difference. First operand 1800 states and 6961 transitions. Second operand 5 states. [2020-04-17 22:51:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:37,959 INFO L93 Difference]: Finished difference Result 2762 states and 9976 transitions. [2020-04-17 22:51:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:37,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-04-17 22:51:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:37,967 INFO L225 Difference]: With dead ends: 2762 [2020-04-17 22:51:37,967 INFO L226 Difference]: Without dead ends: 2746 [2020-04-17 22:51:37,967 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 22:51:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2020-04-17 22:51:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1965. [2020-04-17 22:51:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1965 states. [2020-04-17 22:51:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 7429 transitions. [2020-04-17 22:51:38,037 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 7429 transitions. Word has length 21 [2020-04-17 22:51:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:38,038 INFO L479 AbstractCegarLoop]: Abstraction has 1965 states and 7429 transitions. [2020-04-17 22:51:38,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 7429 transitions. [2020-04-17 22:51:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 22:51:38,041 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:38,041 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:38,041 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 22:51:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1788555247, now seen corresponding path program 1 times [2020-04-17 22:51:38,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:38,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789263685] [2020-04-17 22:51:38,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:51:38,067 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:51:38,068 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:51:38,068 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:51:38,068 WARN L363 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:51:38,069 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-04-17 22:51:38,081 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,081 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,082 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,082 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,082 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,082 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,082 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,082 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,083 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,083 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,083 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,083 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,083 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,083 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,083 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,084 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,084 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,084 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,084 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,084 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,084 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,085 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,085 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,085 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,085 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,085 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,085 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,085 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,086 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,086 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,086 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,086 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,086 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,086 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,086 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,087 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,087 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,087 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,087 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,087 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,087 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,087 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,088 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,088 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,088 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,088 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,088 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,088 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,088 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,089 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,089 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,089 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,089 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,089 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,089 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,090 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,090 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,090 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,090 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,090 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,090 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,090 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,090 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,091 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,091 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,091 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,091 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,091 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,091 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,091 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,092 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,092 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,092 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,092 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,092 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,092 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,093 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,093 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,093 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,093 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,093 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,093 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,093 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,094 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,094 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,094 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,094 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,094 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,095 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,095 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,096 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,096 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,097 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,097 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,097 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,098 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,098 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,099 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,099 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,099 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,100 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,128 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,129 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,129 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,129 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,131 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,131 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,131 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,131 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,132 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,133 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,133 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,133 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,133 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,133 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,133 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,135 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,135 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,135 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,135 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,135 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,135 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,136 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,137 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,137 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,137 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,137 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,137 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,138 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,139 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,139 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,139 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,139 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,139 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,140 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,140 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,141 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,141 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,141 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,141 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:51:38,142 INFO L251 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-04-17 22:51:38,143 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:51:38,143 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:51:38,143 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:51:38,143 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:51:38,143 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:51:38,143 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:51:38,143 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:51:38,143 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:51:38,145 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 122 transitions, 334 flow [2020-04-17 22:51:38,145 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 137 places, 122 transitions, 334 flow [2020-04-17 22:51:38,161 INFO L129 PetriNetUnfolder]: 8/152 cut-off events. [2020-04-17 22:51:38,161 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2020-04-17 22:51:38,162 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 22:51:38,166 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 137 places, 122 transitions, 334 flow [2020-04-17 22:51:38,181 INFO L129 PetriNetUnfolder]: 8/152 cut-off events. [2020-04-17 22:51:38,181 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2020-04-17 22:51:38,182 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 22:51:38,186 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2264 [2020-04-17 22:51:38,187 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:51:40,188 WARN L192 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-04-17 22:51:40,473 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-04-17 22:51:40,709 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-04-17 22:51:40,792 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2999 [2020-04-17 22:51:40,792 INFO L214 etLargeBlockEncoding]: Total number of compositions: 104 [2020-04-17 22:51:40,806 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 39 transitions, 168 flow [2020-04-17 22:51:41,203 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6191 states. [2020-04-17 22:51:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states. [2020-04-17 22:51:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:51:41,204 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:41,204 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:51:41,204 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 22:51:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:41,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1026170, now seen corresponding path program 1 times [2020-04-17 22:51:41,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:41,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960633166] [2020-04-17 22:51:41,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:41,238 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 22:51:41,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960633166] [2020-04-17 22:51:41,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:41,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:51:41,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536078698] [2020-04-17 22:51:41,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:51:41,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:41,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:51:41,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:51:41,239 INFO L87 Difference]: Start difference. First operand 6191 states. Second operand 3 states. [2020-04-17 22:51:41,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:41,306 INFO L93 Difference]: Finished difference Result 5844 states and 26316 transitions. [2020-04-17 22:51:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:51:41,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:51:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:41,326 INFO L225 Difference]: With dead ends: 5844 [2020-04-17 22:51:41,326 INFO L226 Difference]: Without dead ends: 5479 [2020-04-17 22:51:41,327 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 22:51:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5479 states. [2020-04-17 22:51:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5479 to 5479. [2020-04-17 22:51:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5479 states. [2020-04-17 22:51:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 24493 transitions. [2020-04-17 22:51:41,530 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 24493 transitions. Word has length 3 [2020-04-17 22:51:41,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:41,530 INFO L479 AbstractCegarLoop]: Abstraction has 5479 states and 24493 transitions. [2020-04-17 22:51:41,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:51:41,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 24493 transitions. [2020-04-17 22:51:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:51:41,531 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:41,531 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:41,531 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 22:51:41,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:41,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1344335463, now seen corresponding path program 1 times [2020-04-17 22:51:41,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:41,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023085109] [2020-04-17 22:51:41,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:41,557 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 22:51:41,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023085109] [2020-04-17 22:51:41,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:41,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:41,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980986448] [2020-04-17 22:51:41,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:41,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:41,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:41,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:41,559 INFO L87 Difference]: Start difference. First operand 5479 states and 24493 transitions. Second operand 5 states. [2020-04-17 22:51:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:41,684 INFO L93 Difference]: Finished difference Result 9673 states and 40333 transitions. [2020-04-17 22:51:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:41,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 22:51:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:41,708 INFO L225 Difference]: With dead ends: 9673 [2020-04-17 22:51:41,708 INFO L226 Difference]: Without dead ends: 9666 [2020-04-17 22:51:41,708 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 22:51:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2020-04-17 22:51:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 6331. [2020-04-17 22:51:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6331 states. [2020-04-17 22:51:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 28544 transitions. [2020-04-17 22:51:41,929 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 28544 transitions. Word has length 9 [2020-04-17 22:51:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:41,929 INFO L479 AbstractCegarLoop]: Abstraction has 6331 states and 28544 transitions. [2020-04-17 22:51:41,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 28544 transitions. [2020-04-17 22:51:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:51:41,929 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:41,930 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:41,930 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 22:51:41,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:41,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1513378118, now seen corresponding path program 1 times [2020-04-17 22:51:41,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:41,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675690306] [2020-04-17 22:51:41,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:41,981 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 22:51:41,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675690306] [2020-04-17 22:51:41,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:41,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:41,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879773535] [2020-04-17 22:51:41,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:41,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:41,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:41,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:41,983 INFO L87 Difference]: Start difference. First operand 6331 states and 28544 transitions. Second operand 5 states. [2020-04-17 22:51:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:42,286 INFO L93 Difference]: Finished difference Result 11081 states and 46826 transitions. [2020-04-17 22:51:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:42,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-17 22:51:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:42,330 INFO L225 Difference]: With dead ends: 11081 [2020-04-17 22:51:42,330 INFO L226 Difference]: Without dead ends: 11068 [2020-04-17 22:51:42,331 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 22:51:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11068 states. [2020-04-17 22:51:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11068 to 7391. [2020-04-17 22:51:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7391 states. [2020-04-17 22:51:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7391 states to 7391 states and 33694 transitions. [2020-04-17 22:51:42,783 INFO L78 Accepts]: Start accepts. Automaton has 7391 states and 33694 transitions. Word has length 13 [2020-04-17 22:51:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:42,783 INFO L479 AbstractCegarLoop]: Abstraction has 7391 states and 33694 transitions. [2020-04-17 22:51:42,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 7391 states and 33694 transitions. [2020-04-17 22:51:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:42,785 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:42,785 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:42,785 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 22:51:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:42,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1678648171, now seen corresponding path program 1 times [2020-04-17 22:51:42,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:42,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482725609] [2020-04-17 22:51:42,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:42,841 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 22:51:42,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482725609] [2020-04-17 22:51:42,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158035060] [2020-04-17 22:51:42,842 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 22:51:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:42,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:42,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:42,979 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 22:51:42,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:42,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:42,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904747165] [2020-04-17 22:51:42,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:42,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:42,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:42,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:42,981 INFO L87 Difference]: Start difference. First operand 7391 states and 33694 transitions. Second operand 12 states. [2020-04-17 22:51:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:43,337 INFO L93 Difference]: Finished difference Result 16749 states and 66010 transitions. [2020-04-17 22:51:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:43,337 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 22:51:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:43,376 INFO L225 Difference]: With dead ends: 16749 [2020-04-17 22:51:43,377 INFO L226 Difference]: Without dead ends: 16736 [2020-04-17 22:51:43,377 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 22:51:43,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16736 states. [2020-04-17 22:51:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16736 to 7303. [2020-04-17 22:51:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7303 states. [2020-04-17 22:51:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 33260 transitions. [2020-04-17 22:51:44,578 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 33260 transitions. Word has length 15 [2020-04-17 22:51:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:44,578 INFO L479 AbstractCegarLoop]: Abstraction has 7303 states and 33260 transitions. [2020-04-17 22:51:44,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 33260 transitions. [2020-04-17 22:51:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:51:44,578 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:44,579 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:44,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:44,781 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 22:51:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:44,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1637555113, now seen corresponding path program 2 times [2020-04-17 22:51:44,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:44,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836753238] [2020-04-17 22:51:44,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:44,831 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 22:51:44,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836753238] [2020-04-17 22:51:44,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:44,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:44,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759227341] [2020-04-17 22:51:44,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:44,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:44,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:44,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:44,832 INFO L87 Difference]: Start difference. First operand 7303 states and 33260 transitions. Second operand 7 states. [2020-04-17 22:51:45,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:45,176 INFO L93 Difference]: Finished difference Result 17085 states and 67393 transitions. [2020-04-17 22:51:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:45,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-04-17 22:51:45,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:45,213 INFO L225 Difference]: With dead ends: 17085 [2020-04-17 22:51:45,214 INFO L226 Difference]: Without dead ends: 17071 [2020-04-17 22:51:45,214 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 22:51:45,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17071 states. [2020-04-17 22:51:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17071 to 7048. [2020-04-17 22:51:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7048 states. [2020-04-17 22:51:45,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 32136 transitions. [2020-04-17 22:51:45,498 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 32136 transitions. Word has length 15 [2020-04-17 22:51:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:45,498 INFO L479 AbstractCegarLoop]: Abstraction has 7048 states and 32136 transitions. [2020-04-17 22:51:45,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 32136 transitions. [2020-04-17 22:51:45,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:51:45,499 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:45,499 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:45,499 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 22:51:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:45,500 INFO L82 PathProgramCache]: Analyzing trace with hash -288445665, now seen corresponding path program 1 times [2020-04-17 22:51:45,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:45,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657285529] [2020-04-17 22:51:45,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:45,543 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 22:51:45,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657285529] [2020-04-17 22:51:45,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:45,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:45,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078028359] [2020-04-17 22:51:45,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:45,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:45,545 INFO L87 Difference]: Start difference. First operand 7048 states and 32136 transitions. Second operand 5 states. [2020-04-17 22:51:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:45,713 INFO L93 Difference]: Finished difference Result 12234 states and 52488 transitions. [2020-04-17 22:51:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:45,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-04-17 22:51:45,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:45,758 INFO L225 Difference]: With dead ends: 12234 [2020-04-17 22:51:45,759 INFO L226 Difference]: Without dead ends: 12212 [2020-04-17 22:51:45,759 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 22:51:45,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12212 states. [2020-04-17 22:51:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12212 to 8342. [2020-04-17 22:51:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8342 states. [2020-04-17 22:51:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8342 states to 8342 states and 38278 transitions. [2020-04-17 22:51:46,053 INFO L78 Accepts]: Start accepts. Automaton has 8342 states and 38278 transitions. Word has length 17 [2020-04-17 22:51:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:46,054 INFO L479 AbstractCegarLoop]: Abstraction has 8342 states and 38278 transitions. [2020-04-17 22:51:46,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 8342 states and 38278 transitions. [2020-04-17 22:51:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:46,055 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:46,055 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:46,055 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 22:51:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1255672082, now seen corresponding path program 1 times [2020-04-17 22:51:46,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:46,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727930864] [2020-04-17 22:51:46,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:46,108 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 22:51:46,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727930864] [2020-04-17 22:51:46,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368661734] [2020-04-17 22:51:46,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:51:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:46,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:46,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:46,385 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 22:51:46,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:46,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:46,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956087477] [2020-04-17 22:51:46,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:46,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:46,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:46,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:46,387 INFO L87 Difference]: Start difference. First operand 8342 states and 38278 transitions. Second operand 12 states. [2020-04-17 22:51:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:46,730 INFO L93 Difference]: Finished difference Result 19016 states and 76191 transitions. [2020-04-17 22:51:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:46,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:51:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:46,772 INFO L225 Difference]: With dead ends: 19016 [2020-04-17 22:51:46,772 INFO L226 Difference]: Without dead ends: 18998 [2020-04-17 22:51:46,773 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 22:51:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18998 states. [2020-04-17 22:51:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18998 to 8452. [2020-04-17 22:51:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8452 states. [2020-04-17 22:51:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8452 states to 8452 states and 38704 transitions. [2020-04-17 22:51:47,083 INFO L78 Accepts]: Start accepts. Automaton has 8452 states and 38704 transitions. Word has length 19 [2020-04-17 22:51:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:47,083 INFO L479 AbstractCegarLoop]: Abstraction has 8452 states and 38704 transitions. [2020-04-17 22:51:47,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 8452 states and 38704 transitions. [2020-04-17 22:51:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:47,084 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:47,084 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:47,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:47,288 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 22:51:47,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash 402059005, now seen corresponding path program 1 times [2020-04-17 22:51:47,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:47,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236806964] [2020-04-17 22:51:47,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:47,338 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 22:51:47,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236806964] [2020-04-17 22:51:47,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469233845] [2020-04-17 22:51:47,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:51:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:47,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:51:47,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:47,491 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 22:51:47,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:47,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:51:47,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109750685] [2020-04-17 22:51:47,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:51:47,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:47,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:51:47,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:51:47,492 INFO L87 Difference]: Start difference. First operand 8452 states and 38704 transitions. Second operand 12 states. [2020-04-17 22:51:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:47,917 INFO L93 Difference]: Finished difference Result 19670 states and 79028 transitions. [2020-04-17 22:51:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:47,918 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:51:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:47,996 INFO L225 Difference]: With dead ends: 19670 [2020-04-17 22:51:47,997 INFO L226 Difference]: Without dead ends: 19645 [2020-04-17 22:51:47,997 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 22:51:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2020-04-17 22:51:48,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 8480. [2020-04-17 22:51:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8480 states. [2020-04-17 22:51:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8480 states to 8480 states and 38825 transitions. [2020-04-17 22:51:48,671 INFO L78 Accepts]: Start accepts. Automaton has 8480 states and 38825 transitions. Word has length 19 [2020-04-17 22:51:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:48,671 INFO L479 AbstractCegarLoop]: Abstraction has 8480 states and 38825 transitions. [2020-04-17 22:51:48,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:51:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 8480 states and 38825 transitions. [2020-04-17 22:51:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:48,672 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:48,672 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:48,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:48,873 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 22:51:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1976597437, now seen corresponding path program 2 times [2020-04-17 22:51:48,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:48,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937149274] [2020-04-17 22:51:48,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:48,924 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 22:51:48,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937149274] [2020-04-17 22:51:48,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:48,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:48,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491701536] [2020-04-17 22:51:48,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:48,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:48,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:48,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:48,926 INFO L87 Difference]: Start difference. First operand 8480 states and 38825 transitions. Second operand 7 states. [2020-04-17 22:51:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:49,299 INFO L93 Difference]: Finished difference Result 19852 states and 79846 transitions. [2020-04-17 22:51:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:49,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:51:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:49,343 INFO L225 Difference]: With dead ends: 19852 [2020-04-17 22:51:49,343 INFO L226 Difference]: Without dead ends: 19827 [2020-04-17 22:51:49,343 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 22:51:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19827 states. [2020-04-17 22:51:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19827 to 8379. [2020-04-17 22:51:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8379 states. [2020-04-17 22:51:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8379 states to 8379 states and 38406 transitions. [2020-04-17 22:51:49,670 INFO L78 Accepts]: Start accepts. Automaton has 8379 states and 38406 transitions. Word has length 19 [2020-04-17 22:51:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:49,670 INFO L479 AbstractCegarLoop]: Abstraction has 8379 states and 38406 transitions. [2020-04-17 22:51:49,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:49,670 INFO L276 IsEmpty]: Start isEmpty. Operand 8379 states and 38406 transitions. [2020-04-17 22:51:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:51:49,671 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:49,671 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:49,671 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 22:51:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:49,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1976577008, now seen corresponding path program 2 times [2020-04-17 22:51:49,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:49,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140952629] [2020-04-17 22:51:49,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:49,714 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 22:51:49,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140952629] [2020-04-17 22:51:49,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:49,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:51:49,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680461428] [2020-04-17 22:51:49,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:51:49,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:49,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:51:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:51:49,715 INFO L87 Difference]: Start difference. First operand 8379 states and 38406 transitions. Second operand 7 states. [2020-04-17 22:51:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:50,163 INFO L93 Difference]: Finished difference Result 19555 states and 78564 transitions. [2020-04-17 22:51:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:51:50,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:51:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:50,225 INFO L225 Difference]: With dead ends: 19555 [2020-04-17 22:51:50,225 INFO L226 Difference]: Without dead ends: 19530 [2020-04-17 22:51:50,226 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 22:51:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19530 states. [2020-04-17 22:51:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19530 to 8317. [2020-04-17 22:51:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8317 states. [2020-04-17 22:51:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 38184 transitions. [2020-04-17 22:51:50,713 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 38184 transitions. Word has length 19 [2020-04-17 22:51:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:50,713 INFO L479 AbstractCegarLoop]: Abstraction has 8317 states and 38184 transitions. [2020-04-17 22:51:50,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:51:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 38184 transitions. [2020-04-17 22:51:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:50,714 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:50,714 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 22:51:50,714 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 22:51:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:50,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1389591796, now seen corresponding path program 1 times [2020-04-17 22:51:50,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:50,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706186140] [2020-04-17 22:51:50,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:50,781 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 22:51:50,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706186140] [2020-04-17 22:51:50,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641679810] [2020-04-17 22:51:50,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:51:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:50,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:50,856 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:50,953 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 22:51:50,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:50,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:50,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71952038] [2020-04-17 22:51:50,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:50,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:50,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:50,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:50,955 INFO L87 Difference]: Start difference. First operand 8317 states and 38184 transitions. Second operand 16 states. [2020-04-17 22:51:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:51,898 INFO L93 Difference]: Finished difference Result 26969 states and 101544 transitions. [2020-04-17 22:51:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:51,898 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:51,961 INFO L225 Difference]: With dead ends: 26969 [2020-04-17 22:51:51,962 INFO L226 Difference]: Without dead ends: 26957 [2020-04-17 22:51:51,962 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 22:51:52,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26957 states. [2020-04-17 22:51:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26957 to 8204. [2020-04-17 22:51:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8204 states. [2020-04-17 22:51:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 37628 transitions. [2020-04-17 22:51:52,350 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 37628 transitions. Word has length 21 [2020-04-17 22:51:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:52,350 INFO L479 AbstractCegarLoop]: Abstraction has 8204 states and 37628 transitions. [2020-04-17 22:51:52,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 37628 transitions. [2020-04-17 22:51:52,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:52,352 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:52,352 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 22:51:52,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:52,555 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 22:51:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash 184946636, now seen corresponding path program 2 times [2020-04-17 22:51:52,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:52,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949685096] [2020-04-17 22:51:52,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:52,613 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 22:51:52,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949685096] [2020-04-17 22:51:52,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061250124] [2020-04-17 22:51:52,614 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 22:51:52,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:51:52,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:52,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:52,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:52,978 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 22:51:52,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:52,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:52,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880155237] [2020-04-17 22:51:52,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:52,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:52,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:52,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:52,980 INFO L87 Difference]: Start difference. First operand 8204 states and 37628 transitions. Second operand 16 states. [2020-04-17 22:51:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:53,875 INFO L93 Difference]: Finished difference Result 26661 states and 100277 transitions. [2020-04-17 22:51:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:53,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:53,949 INFO L225 Difference]: With dead ends: 26661 [2020-04-17 22:51:53,949 INFO L226 Difference]: Without dead ends: 26645 [2020-04-17 22:51:53,950 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 22:51:54,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26645 states. [2020-04-17 22:51:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26645 to 8091. [2020-04-17 22:51:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8091 states. [2020-04-17 22:51:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8091 states to 8091 states and 37076 transitions. [2020-04-17 22:51:54,368 INFO L78 Accepts]: Start accepts. Automaton has 8091 states and 37076 transitions. Word has length 21 [2020-04-17 22:51:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:54,368 INFO L479 AbstractCegarLoop]: Abstraction has 8091 states and 37076 transitions. [2020-04-17 22:51:54,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8091 states and 37076 transitions. [2020-04-17 22:51:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:54,369 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:54,369 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 22:51:54,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:54,570 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 22:51:54,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:54,571 INFO L82 PathProgramCache]: Analyzing trace with hash -231570740, now seen corresponding path program 3 times [2020-04-17 22:51:54,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:54,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769068716] [2020-04-17 22:51:54,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:54,644 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 22:51:54,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769068716] [2020-04-17 22:51:54,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669325958] [2020-04-17 22:51:54,645 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 22:51:54,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:51:54,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:54,721 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:54,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:54,831 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 22:51:54,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:54,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:54,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177104558] [2020-04-17 22:51:54,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:54,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:54,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:54,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:54,833 INFO L87 Difference]: Start difference. First operand 8091 states and 37076 transitions. Second operand 16 states. [2020-04-17 22:51:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:55,778 INFO L93 Difference]: Finished difference Result 26686 states and 100402 transitions. [2020-04-17 22:51:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:55,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:55,850 INFO L225 Difference]: With dead ends: 26686 [2020-04-17 22:51:55,850 INFO L226 Difference]: Without dead ends: 26674 [2020-04-17 22:51:55,851 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 22:51:56,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26674 states. [2020-04-17 22:51:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26674 to 7861. [2020-04-17 22:51:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7861 states. [2020-04-17 22:51:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 36066 transitions. [2020-04-17 22:51:56,345 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 36066 transitions. Word has length 21 [2020-04-17 22:51:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:56,345 INFO L479 AbstractCegarLoop]: Abstraction has 7861 states and 36066 transitions. [2020-04-17 22:51:56,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 36066 transitions. [2020-04-17 22:51:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:56,346 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:56,346 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 22:51:56,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:56,547 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 22:51:56,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:56,548 INFO L82 PathProgramCache]: Analyzing trace with hash -168366002, now seen corresponding path program 4 times [2020-04-17 22:51:56,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:56,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270735417] [2020-04-17 22:51:56,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:56,612 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 22:51:56,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270735417] [2020-04-17 22:51:56,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477492561] [2020-04-17 22:51:56,613 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 22:51:56,688 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:51:56,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:51:56,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:51:56,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:51:56,793 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 22:51:56,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:51:56,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:51:56,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905628280] [2020-04-17 22:51:56,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:51:56,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:51:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:51:56,794 INFO L87 Difference]: Start difference. First operand 7861 states and 36066 transitions. Second operand 16 states. [2020-04-17 22:51:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:57,765 INFO L93 Difference]: Finished difference Result 26489 states and 99650 transitions. [2020-04-17 22:51:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:57,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:51:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:57,834 INFO L225 Difference]: With dead ends: 26489 [2020-04-17 22:51:57,834 INFO L226 Difference]: Without dead ends: 26473 [2020-04-17 22:51:57,834 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:51:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26473 states. [2020-04-17 22:51:58,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26473 to 7748. [2020-04-17 22:51:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7748 states. [2020-04-17 22:51:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7748 states to 7748 states and 35514 transitions. [2020-04-17 22:51:58,213 INFO L78 Accepts]: Start accepts. Automaton has 7748 states and 35514 transitions. Word has length 21 [2020-04-17 22:51:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:58,213 INFO L479 AbstractCegarLoop]: Abstraction has 7748 states and 35514 transitions. [2020-04-17 22:51:58,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:51:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 7748 states and 35514 transitions. [2020-04-17 22:51:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:58,214 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:58,214 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:51:58,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:51:58,417 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 22:51:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:58,417 INFO L82 PathProgramCache]: Analyzing trace with hash 210203517, now seen corresponding path program 1 times [2020-04-17 22:51:58,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:58,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455681549] [2020-04-17 22:51:58,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:58,450 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 22:51:58,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455681549] [2020-04-17 22:51:58,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:58,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:51:58,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785140467] [2020-04-17 22:51:58,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:51:58,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:58,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:51:58,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:51:58,452 INFO L87 Difference]: Start difference. First operand 7748 states and 35514 transitions. Second operand 5 states. [2020-04-17 22:51:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:58,731 INFO L93 Difference]: Finished difference Result 13251 states and 57501 transitions. [2020-04-17 22:51:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:51:58,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-04-17 22:51:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:51:58,771 INFO L225 Difference]: With dead ends: 13251 [2020-04-17 22:51:58,771 INFO L226 Difference]: Without dead ends: 13220 [2020-04-17 22:51:58,771 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 22:51:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13220 states. [2020-04-17 22:51:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13220 to 9255. [2020-04-17 22:51:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9255 states. [2020-04-17 22:51:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9255 states to 9255 states and 42368 transitions. [2020-04-17 22:51:59,038 INFO L78 Accepts]: Start accepts. Automaton has 9255 states and 42368 transitions. Word has length 21 [2020-04-17 22:51:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:51:59,038 INFO L479 AbstractCegarLoop]: Abstraction has 9255 states and 42368 transitions. [2020-04-17 22:51:59,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:51:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 9255 states and 42368 transitions. [2020-04-17 22:51:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:51:59,039 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:51:59,039 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 22:51:59,040 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 22:51:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:51:59,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1134578958, now seen corresponding path program 5 times [2020-04-17 22:51:59,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:51:59,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180986964] [2020-04-17 22:51:59,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:51:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:51:59,102 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 22:51:59,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180986964] [2020-04-17 22:51:59,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:51:59,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:51:59,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147417460] [2020-04-17 22:51:59,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:51:59,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:51:59,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:51:59,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:51:59,104 INFO L87 Difference]: Start difference. First operand 9255 states and 42368 transitions. Second operand 9 states. [2020-04-17 22:51:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:51:59,952 INFO L93 Difference]: Finished difference Result 29788 states and 113841 transitions. [2020-04-17 22:51:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:51:59,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:51:59,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:00,022 INFO L225 Difference]: With dead ends: 29788 [2020-04-17 22:52:00,022 INFO L226 Difference]: Without dead ends: 29770 [2020-04-17 22:52:00,023 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 22:52:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29770 states. [2020-04-17 22:52:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29770 to 8964. [2020-04-17 22:52:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8964 states. [2020-04-17 22:52:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8964 states to 8964 states and 41031 transitions. [2020-04-17 22:52:00,481 INFO L78 Accepts]: Start accepts. Automaton has 8964 states and 41031 transitions. Word has length 21 [2020-04-17 22:52:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:00,481 INFO L479 AbstractCegarLoop]: Abstraction has 8964 states and 41031 transitions. [2020-04-17 22:52:00,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 8964 states and 41031 transitions. [2020-04-17 22:52:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:52:00,483 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:00,483 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 22:52:00,483 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 22:52:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1114967118, now seen corresponding path program 6 times [2020-04-17 22:52:00,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:00,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844141495] [2020-04-17 22:52:00,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:00,554 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 22:52:00,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844141495] [2020-04-17 22:52:00,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:00,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:00,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907648074] [2020-04-17 22:52:00,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:00,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:00,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:00,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:00,558 INFO L87 Difference]: Start difference. First operand 8964 states and 41031 transitions. Second operand 9 states. [2020-04-17 22:52:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:01,471 INFO L93 Difference]: Finished difference Result 29379 states and 112099 transitions. [2020-04-17 22:52:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:01,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:52:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:01,546 INFO L225 Difference]: With dead ends: 29379 [2020-04-17 22:52:01,546 INFO L226 Difference]: Without dead ends: 29356 [2020-04-17 22:52:01,547 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 22:52:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29356 states. [2020-04-17 22:52:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29356 to 8573. [2020-04-17 22:52:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8573 states. [2020-04-17 22:52:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8573 states to 8573 states and 39353 transitions. [2020-04-17 22:52:02,134 INFO L78 Accepts]: Start accepts. Automaton has 8573 states and 39353 transitions. Word has length 21 [2020-04-17 22:52:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:02,134 INFO L479 AbstractCegarLoop]: Abstraction has 8573 states and 39353 transitions. [2020-04-17 22:52:02,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 8573 states and 39353 transitions. [2020-04-17 22:52:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:52:02,136 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:02,136 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:02,136 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 22:52:02,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:02,136 INFO L82 PathProgramCache]: Analyzing trace with hash 715669452, now seen corresponding path program 1 times [2020-04-17 22:52:02,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:02,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443908908] [2020-04-17 22:52:02,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:02,184 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 22:52:02,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443908908] [2020-04-17 22:52:02,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773237190] [2020-04-17 22:52:02,185 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 22:52:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:02,273 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:52:02,274 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:02,323 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 22:52:02,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:02,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:52:02,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644664359] [2020-04-17 22:52:02,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:52:02,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:52:02,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:52:02,325 INFO L87 Difference]: Start difference. First operand 8573 states and 39353 transitions. Second operand 12 states. [2020-04-17 22:52:02,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:02,744 INFO L93 Difference]: Finished difference Result 19727 states and 80274 transitions. [2020-04-17 22:52:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:02,744 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:52:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:02,790 INFO L225 Difference]: With dead ends: 19727 [2020-04-17 22:52:02,790 INFO L226 Difference]: Without dead ends: 19703 [2020-04-17 22:52:02,791 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 22:52:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19703 states. [2020-04-17 22:52:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19703 to 8847. [2020-04-17 22:52:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8847 states. [2020-04-17 22:52:03,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 40495 transitions. [2020-04-17 22:52:03,139 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 40495 transitions. Word has length 23 [2020-04-17 22:52:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:03,140 INFO L479 AbstractCegarLoop]: Abstraction has 8847 states and 40495 transitions. [2020-04-17 22:52:03,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:52:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 40495 transitions. [2020-04-17 22:52:03,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:52:03,142 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:03,142 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:03,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:03,342 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 22:52:03,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:03,343 INFO L82 PathProgramCache]: Analyzing trace with hash 504272987, now seen corresponding path program 1 times [2020-04-17 22:52:03,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:03,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336788860] [2020-04-17 22:52:03,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:03,385 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 22:52:03,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336788860] [2020-04-17 22:52:03,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766559152] [2020-04-17 22:52:03,386 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 22:52:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:03,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:52:03,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:03,540 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 22:52:03,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:03,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:52:03,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462430842] [2020-04-17 22:52:03,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:52:03,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:03,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:52:03,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:52:03,544 INFO L87 Difference]: Start difference. First operand 8847 states and 40495 transitions. Second operand 12 states. [2020-04-17 22:52:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:03,918 INFO L93 Difference]: Finished difference Result 20694 states and 84261 transitions. [2020-04-17 22:52:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:03,919 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:52:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:03,971 INFO L225 Difference]: With dead ends: 20694 [2020-04-17 22:52:03,971 INFO L226 Difference]: Without dead ends: 20666 [2020-04-17 22:52:03,972 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 22:52:04,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20666 states. [2020-04-17 22:52:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20666 to 9115. [2020-04-17 22:52:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9115 states. [2020-04-17 22:52:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 41679 transitions. [2020-04-17 22:52:04,571 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 41679 transitions. Word has length 23 [2020-04-17 22:52:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:04,571 INFO L479 AbstractCegarLoop]: Abstraction has 9115 states and 41679 transitions. [2020-04-17 22:52:04,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:52:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 41679 transitions. [2020-04-17 22:52:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:52:04,573 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:04,573 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:04,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:04,774 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 22:52:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:04,775 INFO L82 PathProgramCache]: Analyzing trace with hash 591685125, now seen corresponding path program 1 times [2020-04-17 22:52:04,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:04,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339067765] [2020-04-17 22:52:04,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:04,834 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 22:52:04,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339067765] [2020-04-17 22:52:04,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353801610] [2020-04-17 22:52:04,835 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 22:52:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:04,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:52:04,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:04,973 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 22:52:04,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:04,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:52:04,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040848026] [2020-04-17 22:52:04,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:52:04,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:04,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:52:04,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:52:04,975 INFO L87 Difference]: Start difference. First operand 9115 states and 41679 transitions. Second operand 12 states. [2020-04-17 22:52:05,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:05,414 INFO L93 Difference]: Finished difference Result 21396 states and 87360 transitions. [2020-04-17 22:52:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:05,414 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:52:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:05,467 INFO L225 Difference]: With dead ends: 21396 [2020-04-17 22:52:05,468 INFO L226 Difference]: Without dead ends: 21359 [2020-04-17 22:52:05,468 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 22:52:05,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21359 states. [2020-04-17 22:52:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21359 to 9320. [2020-04-17 22:52:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9320 states. [2020-04-17 22:52:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9320 states to 9320 states and 42648 transitions. [2020-04-17 22:52:05,829 INFO L78 Accepts]: Start accepts. Automaton has 9320 states and 42648 transitions. Word has length 23 [2020-04-17 22:52:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:05,830 INFO L479 AbstractCegarLoop]: Abstraction has 9320 states and 42648 transitions. [2020-04-17 22:52:05,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:52:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 9320 states and 42648 transitions. [2020-04-17 22:52:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:52:05,832 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:05,832 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:06,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:06,033 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 22:52:06,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash 142124187, now seen corresponding path program 2 times [2020-04-17 22:52:06,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:06,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094008686] [2020-04-17 22:52:06,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:06,077 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 22:52:06,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094008686] [2020-04-17 22:52:06,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:06,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:52:06,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030893699] [2020-04-17 22:52:06,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:52:06,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:06,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:52:06,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:06,079 INFO L87 Difference]: Start difference. First operand 9320 states and 42648 transitions. Second operand 7 states. [2020-04-17 22:52:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:06,453 INFO L93 Difference]: Finished difference Result 21489 states and 87752 transitions. [2020-04-17 22:52:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:06,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:52:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:06,502 INFO L225 Difference]: With dead ends: 21489 [2020-04-17 22:52:06,502 INFO L226 Difference]: Without dead ends: 21452 [2020-04-17 22:52:06,503 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 22:52:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21452 states. [2020-04-17 22:52:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21452 to 9401. [2020-04-17 22:52:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9401 states. [2020-04-17 22:52:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9401 states to 9401 states and 43010 transitions. [2020-04-17 22:52:06,852 INFO L78 Accepts]: Start accepts. Automaton has 9401 states and 43010 transitions. Word has length 23 [2020-04-17 22:52:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:06,852 INFO L479 AbstractCegarLoop]: Abstraction has 9401 states and 43010 transitions. [2020-04-17 22:52:06,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:52:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 9401 states and 43010 transitions. [2020-04-17 22:52:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:52:06,854 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:06,854 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:06,854 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 22:52:06,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:06,854 INFO L82 PathProgramCache]: Analyzing trace with hash 142117429, now seen corresponding path program 2 times [2020-04-17 22:52:06,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:06,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260735868] [2020-04-17 22:52:06,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:06,914 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 22:52:06,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260735868] [2020-04-17 22:52:06,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:06,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:52:06,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204153232] [2020-04-17 22:52:06,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:52:06,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:06,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:52:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:06,916 INFO L87 Difference]: Start difference. First operand 9401 states and 43010 transitions. Second operand 7 states. [2020-04-17 22:52:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:07,365 INFO L93 Difference]: Finished difference Result 21198 states and 86437 transitions. [2020-04-17 22:52:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:07,366 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:52:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:07,447 INFO L225 Difference]: With dead ends: 21198 [2020-04-17 22:52:07,447 INFO L226 Difference]: Without dead ends: 21161 [2020-04-17 22:52:07,449 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 22:52:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21161 states. [2020-04-17 22:52:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21161 to 9396. [2020-04-17 22:52:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9396 states. [2020-04-17 22:52:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9396 states to 9396 states and 42985 transitions. [2020-04-17 22:52:07,887 INFO L78 Accepts]: Start accepts. Automaton has 9396 states and 42985 transitions. Word has length 23 [2020-04-17 22:52:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:07,887 INFO L479 AbstractCegarLoop]: Abstraction has 9396 states and 42985 transitions. [2020-04-17 22:52:07,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:52:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 9396 states and 42985 transitions. [2020-04-17 22:52:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:52:07,889 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:07,889 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:07,889 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 22:52:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash 142103758, now seen corresponding path program 2 times [2020-04-17 22:52:07,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:07,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922493451] [2020-04-17 22:52:07,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:08,063 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-04-17 22:52:08,079 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 22:52:08,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922493451] [2020-04-17 22:52:08,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:08,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:52:08,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296179103] [2020-04-17 22:52:08,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:52:08,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:52:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:08,081 INFO L87 Difference]: Start difference. First operand 9396 states and 42985 transitions. Second operand 7 states. [2020-04-17 22:52:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:08,446 INFO L93 Difference]: Finished difference Result 21067 states and 85734 transitions. [2020-04-17 22:52:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:08,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:52:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:08,496 INFO L225 Difference]: With dead ends: 21067 [2020-04-17 22:52:08,496 INFO L226 Difference]: Without dead ends: 21030 [2020-04-17 22:52:08,496 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 22:52:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-04-17 22:52:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 9426. [2020-04-17 22:52:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9426 states. [2020-04-17 22:52:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9426 states to 9426 states and 43057 transitions. [2020-04-17 22:52:08,843 INFO L78 Accepts]: Start accepts. Automaton has 9426 states and 43057 transitions. Word has length 23 [2020-04-17 22:52:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:08,844 INFO L479 AbstractCegarLoop]: Abstraction has 9426 states and 43057 transitions. [2020-04-17 22:52:08,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:52:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 9426 states and 43057 transitions. [2020-04-17 22:52:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:08,847 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:08,847 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 22:52:08,847 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 22:52:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:08,847 INFO L82 PathProgramCache]: Analyzing trace with hash 925732074, now seen corresponding path program 1 times [2020-04-17 22:52:08,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:08,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922828836] [2020-04-17 22:52:08,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:08,917 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 22:52:08,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922828836] [2020-04-17 22:52:08,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840659364] [2020-04-17 22:52:08,918 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 22:52:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:08,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:08,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:09,077 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 22:52:09,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:09,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:09,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910592247] [2020-04-17 22:52:09,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:09,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:09,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:09,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:09,080 INFO L87 Difference]: Start difference. First operand 9426 states and 43057 transitions. Second operand 16 states. [2020-04-17 22:52:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:10,214 INFO L93 Difference]: Finished difference Result 30145 states and 115754 transitions. [2020-04-17 22:52:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:10,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:10,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:10,282 INFO L225 Difference]: With dead ends: 30145 [2020-04-17 22:52:10,282 INFO L226 Difference]: Without dead ends: 30125 [2020-04-17 22:52:10,283 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 22:52:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30125 states. [2020-04-17 22:52:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30125 to 9338. [2020-04-17 22:52:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9338 states. [2020-04-17 22:52:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9338 states to 9338 states and 42582 transitions. [2020-04-17 22:52:10,729 INFO L78 Accepts]: Start accepts. Automaton has 9338 states and 42582 transitions. Word has length 25 [2020-04-17 22:52:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:10,729 INFO L479 AbstractCegarLoop]: Abstraction has 9338 states and 42582 transitions. [2020-04-17 22:52:10,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 9338 states and 42582 transitions. [2020-04-17 22:52:10,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:10,732 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:10,732 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 22:52:10,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:10,933 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 22:52:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:10,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1013144212, now seen corresponding path program 1 times [2020-04-17 22:52:10,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:10,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984179833] [2020-04-17 22:52:10,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:10,992 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 22:52:10,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984179833] [2020-04-17 22:52:10,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243809296] [2020-04-17 22:52:10,992 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 22:52:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:11,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:11,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:11,175 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 22:52:11,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:11,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:11,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044510846] [2020-04-17 22:52:11,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:11,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:11,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:11,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:11,177 INFO L87 Difference]: Start difference. First operand 9338 states and 42582 transitions. Second operand 16 states. [2020-04-17 22:52:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:12,183 INFO L93 Difference]: Finished difference Result 29696 states and 113916 transitions. [2020-04-17 22:52:12,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:12,184 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:12,254 INFO L225 Difference]: With dead ends: 29696 [2020-04-17 22:52:12,254 INFO L226 Difference]: Without dead ends: 29676 [2020-04-17 22:52:12,254 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 22:52:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29676 states. [2020-04-17 22:52:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29676 to 9291. [2020-04-17 22:52:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9291 states. [2020-04-17 22:52:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9291 states to 9291 states and 42295 transitions. [2020-04-17 22:52:12,687 INFO L78 Accepts]: Start accepts. Automaton has 9291 states and 42295 transitions. Word has length 25 [2020-04-17 22:52:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:12,687 INFO L479 AbstractCegarLoop]: Abstraction has 9291 states and 42295 transitions. [2020-04-17 22:52:12,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 9291 states and 42295 transitions. [2020-04-17 22:52:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:12,690 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:12,691 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 22:52:12,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:12,891 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 22:52:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:12,892 INFO L82 PathProgramCache]: Analyzing trace with hash 563583274, now seen corresponding path program 2 times [2020-04-17 22:52:12,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:12,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451753413] [2020-04-17 22:52:12,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:12,960 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 22:52:12,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451753413] [2020-04-17 22:52:12,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447892025] [2020-04-17 22:52:12,961 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 22:52:13,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:52:13,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:13,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:13,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:13,130 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 22:52:13,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:13,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:13,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24192964] [2020-04-17 22:52:13,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:13,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:13,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:13,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:13,131 INFO L87 Difference]: Start difference. First operand 9291 states and 42295 transitions. Second operand 16 states. [2020-04-17 22:52:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:14,057 INFO L93 Difference]: Finished difference Result 29267 states and 112142 transitions. [2020-04-17 22:52:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:14,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:14,123 INFO L225 Difference]: With dead ends: 29267 [2020-04-17 22:52:14,123 INFO L226 Difference]: Without dead ends: 29245 [2020-04-17 22:52:14,123 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 22:52:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29245 states. [2020-04-17 22:52:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29245 to 9288. [2020-04-17 22:52:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9288 states. [2020-04-17 22:52:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9288 states to 9288 states and 42242 transitions. [2020-04-17 22:52:14,584 INFO L78 Accepts]: Start accepts. Automaton has 9288 states and 42242 transitions. Word has length 25 [2020-04-17 22:52:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:14,585 INFO L479 AbstractCegarLoop]: Abstraction has 9288 states and 42242 transitions. [2020-04-17 22:52:14,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 9288 states and 42242 transitions. [2020-04-17 22:52:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:14,588 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:14,588 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 22:52:14,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:14,789 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 22:52:14,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:14,789 INFO L82 PathProgramCache]: Analyzing trace with hash 563576516, now seen corresponding path program 2 times [2020-04-17 22:52:14,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:14,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622477053] [2020-04-17 22:52:14,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:14,852 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 22:52:14,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622477053] [2020-04-17 22:52:14,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838759898] [2020-04-17 22:52:14,853 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 22:52:14,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:52:14,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:14,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:14,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:15,024 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 22:52:15,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:15,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:15,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851764102] [2020-04-17 22:52:15,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:15,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:15,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:15,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:15,026 INFO L87 Difference]: Start difference. First operand 9288 states and 42242 transitions. Second operand 16 states. [2020-04-17 22:52:16,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:16,185 INFO L93 Difference]: Finished difference Result 28920 states and 110796 transitions. [2020-04-17 22:52:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:16,186 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:16,264 INFO L225 Difference]: With dead ends: 28920 [2020-04-17 22:52:16,265 INFO L226 Difference]: Without dead ends: 28898 [2020-04-17 22:52:16,265 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 22:52:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28898 states. [2020-04-17 22:52:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28898 to 9176. [2020-04-17 22:52:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9176 states. [2020-04-17 22:52:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9176 states to 9176 states and 41695 transitions. [2020-04-17 22:52:16,849 INFO L78 Accepts]: Start accepts. Automaton has 9176 states and 41695 transitions. Word has length 25 [2020-04-17 22:52:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:16,849 INFO L479 AbstractCegarLoop]: Abstraction has 9176 states and 41695 transitions. [2020-04-17 22:52:16,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 9176 states and 41695 transitions. [2020-04-17 22:52:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:16,853 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:16,853 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 22:52:17,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:17,053 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 22:52:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:17,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2052215638, now seen corresponding path program 3 times [2020-04-17 22:52:17,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:17,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375463747] [2020-04-17 22:52:17,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:17,124 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 22:52:17,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375463747] [2020-04-17 22:52:17,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347701310] [2020-04-17 22:52:17,125 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 22:52:17,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:52:17,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:17,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:17,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:17,301 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 22:52:17,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:17,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:17,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339405890] [2020-04-17 22:52:17,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:17,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:17,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:17,303 INFO L87 Difference]: Start difference. First operand 9176 states and 41695 transitions. Second operand 16 states. [2020-04-17 22:52:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:18,220 INFO L93 Difference]: Finished difference Result 29038 states and 111216 transitions. [2020-04-17 22:52:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:18,220 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:18,293 INFO L225 Difference]: With dead ends: 29038 [2020-04-17 22:52:18,293 INFO L226 Difference]: Without dead ends: 29018 [2020-04-17 22:52:18,293 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 22:52:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29018 states. [2020-04-17 22:52:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29018 to 9000. [2020-04-17 22:52:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9000 states. [2020-04-17 22:52:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9000 states to 9000 states and 40897 transitions. [2020-04-17 22:52:18,758 INFO L78 Accepts]: Start accepts. Automaton has 9000 states and 40897 transitions. Word has length 25 [2020-04-17 22:52:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:18,758 INFO L479 AbstractCegarLoop]: Abstraction has 9000 states and 40897 transitions. [2020-04-17 22:52:18,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 9000 states and 40897 transitions. [2020-04-17 22:52:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:18,762 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:18,762 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 22:52:18,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:18,962 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 22:52:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:18,963 INFO L82 PathProgramCache]: Analyzing trace with hash -275395741, now seen corresponding path program 1 times [2020-04-17 22:52:18,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:18,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902323980] [2020-04-17 22:52:18,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:19,042 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 22:52:19,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902323980] [2020-04-17 22:52:19,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444341213] [2020-04-17 22:52:19,043 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 22:52:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:19,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:19,164 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:19,285 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 22:52:19,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:19,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:19,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626885643] [2020-04-17 22:52:19,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:19,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:19,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:19,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:19,287 INFO L87 Difference]: Start difference. First operand 9000 states and 40897 transitions. Second operand 16 states. [2020-04-17 22:52:20,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:20,352 INFO L93 Difference]: Finished difference Result 29417 states and 113034 transitions. [2020-04-17 22:52:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:20,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:20,418 INFO L225 Difference]: With dead ends: 29417 [2020-04-17 22:52:20,419 INFO L226 Difference]: Without dead ends: 29397 [2020-04-17 22:52:20,419 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29397 states. [2020-04-17 22:52:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29397 to 8990. [2020-04-17 22:52:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8990 states. [2020-04-17 22:52:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 40786 transitions. [2020-04-17 22:52:21,088 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 40786 transitions. Word has length 25 [2020-04-17 22:52:21,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:21,088 INFO L479 AbstractCegarLoop]: Abstraction has 8990 states and 40786 transitions. [2020-04-17 22:52:21,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 40786 transitions. [2020-04-17 22:52:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:21,091 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:21,091 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 22:52:21,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:21,292 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 22:52:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash -724963437, now seen corresponding path program 2 times [2020-04-17 22:52:21,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:21,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212920395] [2020-04-17 22:52:21,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:21,350 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 22:52:21,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212920395] [2020-04-17 22:52:21,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476468315] [2020-04-17 22:52:21,351 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 22:52:21,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:52:21,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:21,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:21,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:21,507 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 22:52:21,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:21,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:21,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324956184] [2020-04-17 22:52:21,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:21,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:21,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:21,509 INFO L87 Difference]: Start difference. First operand 8990 states and 40786 transitions. Second operand 16 states. [2020-04-17 22:52:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:22,450 INFO L93 Difference]: Finished difference Result 29064 states and 111552 transitions. [2020-04-17 22:52:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:22,450 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:22,515 INFO L225 Difference]: With dead ends: 29064 [2020-04-17 22:52:22,515 INFO L226 Difference]: Without dead ends: 29037 [2020-04-17 22:52:22,515 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 22:52:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29037 states. [2020-04-17 22:52:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29037 to 8953. [2020-04-17 22:52:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8953 states. [2020-04-17 22:52:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8953 states to 8953 states and 40609 transitions. [2020-04-17 22:52:22,942 INFO L78 Accepts]: Start accepts. Automaton has 8953 states and 40609 transitions. Word has length 25 [2020-04-17 22:52:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:22,943 INFO L479 AbstractCegarLoop]: Abstraction has 8953 states and 40609 transitions. [2020-04-17 22:52:22,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 8953 states and 40609 transitions. [2020-04-17 22:52:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:22,946 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:22,946 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 22:52:23,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:23,147 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 22:52:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash -724977108, now seen corresponding path program 4 times [2020-04-17 22:52:23,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:23,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330192234] [2020-04-17 22:52:23,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:23,225 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 22:52:23,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330192234] [2020-04-17 22:52:23,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138258885] [2020-04-17 22:52:23,226 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 22:52:23,304 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:52:23,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:23,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:23,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:23,388 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 22:52:23,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:23,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:23,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710762681] [2020-04-17 22:52:23,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:23,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:23,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:23,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:23,389 INFO L87 Difference]: Start difference. First operand 8953 states and 40609 transitions. Second operand 16 states. [2020-04-17 22:52:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:24,334 INFO L93 Difference]: Finished difference Result 28523 states and 109227 transitions. [2020-04-17 22:52:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:24,334 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:24,406 INFO L225 Difference]: With dead ends: 28523 [2020-04-17 22:52:24,407 INFO L226 Difference]: Without dead ends: 28501 [2020-04-17 22:52:24,407 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28501 states. [2020-04-17 22:52:24,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28501 to 8841. [2020-04-17 22:52:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8841 states. [2020-04-17 22:52:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 40062 transitions. [2020-04-17 22:52:24,840 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 40062 transitions. Word has length 25 [2020-04-17 22:52:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:24,840 INFO L479 AbstractCegarLoop]: Abstraction has 8841 states and 40062 transitions. [2020-04-17 22:52:24,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 40062 transitions. [2020-04-17 22:52:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:24,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:24,845 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 22:52:25,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:25,047 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 22:52:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:25,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1969402905, now seen corresponding path program 3 times [2020-04-17 22:52:25,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:25,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971464726] [2020-04-17 22:52:25,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:25,137 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 22:52:25,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971464726] [2020-04-17 22:52:25,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270337612] [2020-04-17 22:52:25,138 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 22:52:25,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:52:25,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:25,220 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:25,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:25,308 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 22:52:25,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:25,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:25,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562051433] [2020-04-17 22:52:25,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:25,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:25,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:25,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:25,311 INFO L87 Difference]: Start difference. First operand 8841 states and 40062 transitions. Second operand 16 states. [2020-04-17 22:52:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:26,224 INFO L93 Difference]: Finished difference Result 28636 states and 109852 transitions. [2020-04-17 22:52:26,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:26,224 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:26,300 INFO L225 Difference]: With dead ends: 28636 [2020-04-17 22:52:26,301 INFO L226 Difference]: Without dead ends: 28616 [2020-04-17 22:52:26,301 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 22:52:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2020-04-17 22:52:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 8702. [2020-04-17 22:52:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8702 states. [2020-04-17 22:52:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8702 states to 8702 states and 39438 transitions. [2020-04-17 22:52:26,944 INFO L78 Accepts]: Start accepts. Automaton has 8702 states and 39438 transitions. Word has length 25 [2020-04-17 22:52:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:26,945 INFO L479 AbstractCegarLoop]: Abstraction has 8702 states and 39438 transitions. [2020-04-17 22:52:26,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8702 states and 39438 transitions. [2020-04-17 22:52:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:26,948 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:26,948 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 22:52:27,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:27,151 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 22:52:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:27,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1576190868, now seen corresponding path program 3 times [2020-04-17 22:52:27,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:27,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250186113] [2020-04-17 22:52:27,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:27,246 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 22:52:27,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250186113] [2020-04-17 22:52:27,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100145643] [2020-04-17 22:52:27,247 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 22:52:27,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:52:27,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:27,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:27,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:27,427 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 22:52:27,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:27,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:27,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019276295] [2020-04-17 22:52:27,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:27,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:27,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:27,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:27,428 INFO L87 Difference]: Start difference. First operand 8702 states and 39438 transitions. Second operand 16 states. [2020-04-17 22:52:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:28,306 INFO L93 Difference]: Finished difference Result 28297 states and 108461 transitions. [2020-04-17 22:52:28,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:28,306 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:28,376 INFO L225 Difference]: With dead ends: 28297 [2020-04-17 22:52:28,376 INFO L226 Difference]: Without dead ends: 28277 [2020-04-17 22:52:28,376 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 22:52:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28277 states. [2020-04-17 22:52:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28277 to 8596. [2020-04-17 22:52:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8596 states. [2020-04-17 22:52:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 38978 transitions. [2020-04-17 22:52:28,832 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 38978 transitions. Word has length 25 [2020-04-17 22:52:28,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:28,833 INFO L479 AbstractCegarLoop]: Abstraction has 8596 states and 38978 transitions. [2020-04-17 22:52:28,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:28,833 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 38978 transitions. [2020-04-17 22:52:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:28,836 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:28,836 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 22:52:29,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:29,037 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 22:52:29,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1673729315, now seen corresponding path program 4 times [2020-04-17 22:52:29,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:29,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664392212] [2020-04-17 22:52:29,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:29,095 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 22:52:29,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664392212] [2020-04-17 22:52:29,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609813352] [2020-04-17 22:52:29,096 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 22:52:29,174 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:52:29,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:29,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:29,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:29,261 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 22:52:29,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:29,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:29,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541155653] [2020-04-17 22:52:29,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:29,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:29,263 INFO L87 Difference]: Start difference. First operand 8596 states and 38978 transitions. Second operand 16 states. [2020-04-17 22:52:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:30,362 INFO L93 Difference]: Finished difference Result 28565 states and 109596 transitions. [2020-04-17 22:52:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:30,363 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:30,431 INFO L225 Difference]: With dead ends: 28565 [2020-04-17 22:52:30,432 INFO L226 Difference]: Without dead ends: 28538 [2020-04-17 22:52:30,432 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 22:52:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28538 states. [2020-04-17 22:52:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28538 to 8563. [2020-04-17 22:52:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8563 states. [2020-04-17 22:52:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8563 states to 8563 states and 38809 transitions. [2020-04-17 22:52:30,847 INFO L78 Accepts]: Start accepts. Automaton has 8563 states and 38809 transitions. Word has length 25 [2020-04-17 22:52:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:30,848 INFO L479 AbstractCegarLoop]: Abstraction has 8563 states and 38809 transitions. [2020-04-17 22:52:30,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 8563 states and 38809 transitions. [2020-04-17 22:52:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:30,851 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:30,851 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 22:52:31,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:31,052 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 22:52:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:31,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1673708886, now seen corresponding path program 4 times [2020-04-17 22:52:31,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:31,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297768951] [2020-04-17 22:52:31,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:31,124 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 22:52:31,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297768951] [2020-04-17 22:52:31,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600395072] [2020-04-17 22:52:31,124 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 22:52:31,204 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:52:31,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:52:31,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:52:31,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:31,312 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 22:52:31,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:31,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:52:31,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315307067] [2020-04-17 22:52:31,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:52:31,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:31,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:52:31,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:52:31,314 INFO L87 Difference]: Start difference. First operand 8563 states and 38809 transitions. Second operand 16 states. [2020-04-17 22:52:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:32,458 INFO L93 Difference]: Finished difference Result 28213 states and 108237 transitions. [2020-04-17 22:52:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:32,458 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:52:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:32,528 INFO L225 Difference]: With dead ends: 28213 [2020-04-17 22:52:32,528 INFO L226 Difference]: Without dead ends: 28186 [2020-04-17 22:52:32,528 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 22:52:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28186 states. [2020-04-17 22:52:32,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28186 to 8421. [2020-04-17 22:52:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8421 states. [2020-04-17 22:52:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8421 states to 8421 states and 38146 transitions. [2020-04-17 22:52:32,948 INFO L78 Accepts]: Start accepts. Automaton has 8421 states and 38146 transitions. Word has length 25 [2020-04-17 22:52:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:32,949 INFO L479 AbstractCegarLoop]: Abstraction has 8421 states and 38146 transitions. [2020-04-17 22:52:32,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:52:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 8421 states and 38146 transitions. [2020-04-17 22:52:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:32,952 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:32,952 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 22:52:33,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:33,153 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 22:52:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash -857609261, now seen corresponding path program 5 times [2020-04-17 22:52:33,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:33,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246818347] [2020-04-17 22:52:33,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:33,220 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 22:52:33,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246818347] [2020-04-17 22:52:33,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:33,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:33,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589295480] [2020-04-17 22:52:33,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:33,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:33,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:33,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:33,222 INFO L87 Difference]: Start difference. First operand 8421 states and 38146 transitions. Second operand 9 states. [2020-04-17 22:52:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:34,094 INFO L93 Difference]: Finished difference Result 28226 states and 108274 transitions. [2020-04-17 22:52:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:34,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:34,167 INFO L225 Difference]: With dead ends: 28226 [2020-04-17 22:52:34,167 INFO L226 Difference]: Without dead ends: 28206 [2020-04-17 22:52:34,167 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 22:52:34,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28206 states. [2020-04-17 22:52:34,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28206 to 8277. [2020-04-17 22:52:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8277 states. [2020-04-17 22:52:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 37487 transitions. [2020-04-17 22:52:34,595 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 37487 transitions. Word has length 25 [2020-04-17 22:52:34,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:34,595 INFO L479 AbstractCegarLoop]: Abstraction has 8277 states and 37487 transitions. [2020-04-17 22:52:34,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 37487 transitions. [2020-04-17 22:52:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:34,600 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:34,600 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 22:52:34,600 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 22:52:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:34,600 INFO L82 PathProgramCache]: Analyzing trace with hash -857622932, now seen corresponding path program 5 times [2020-04-17 22:52:34,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:34,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602797007] [2020-04-17 22:52:34,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:34,663 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 22:52:34,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602797007] [2020-04-17 22:52:34,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:34,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:34,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216921885] [2020-04-17 22:52:34,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:34,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:34,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:34,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:34,665 INFO L87 Difference]: Start difference. First operand 8277 states and 37487 transitions. Second operand 9 states. [2020-04-17 22:52:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:35,493 INFO L93 Difference]: Finished difference Result 27801 states and 106552 transitions. [2020-04-17 22:52:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:35,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:35,564 INFO L225 Difference]: With dead ends: 27801 [2020-04-17 22:52:35,564 INFO L226 Difference]: Without dead ends: 27781 [2020-04-17 22:52:35,564 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 22:52:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27781 states. [2020-04-17 22:52:35,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27781 to 8127. [2020-04-17 22:52:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8127 states. [2020-04-17 22:52:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8127 states to 8127 states and 36806 transitions. [2020-04-17 22:52:35,968 INFO L78 Accepts]: Start accepts. Automaton has 8127 states and 36806 transitions. Word has length 25 [2020-04-17 22:52:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:35,968 INFO L479 AbstractCegarLoop]: Abstraction has 8127 states and 36806 transitions. [2020-04-17 22:52:35,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 8127 states and 36806 transitions. [2020-04-17 22:52:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:35,971 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:35,971 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 22:52:35,971 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 22:52:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash -864096941, now seen corresponding path program 6 times [2020-04-17 22:52:35,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:35,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571796061] [2020-04-17 22:52:35,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:36,036 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 22:52:36,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571796061] [2020-04-17 22:52:36,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:36,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:36,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584101874] [2020-04-17 22:52:36,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:36,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:36,038 INFO L87 Difference]: Start difference. First operand 8127 states and 36806 transitions. Second operand 9 states. [2020-04-17 22:52:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:36,828 INFO L93 Difference]: Finished difference Result 27548 states and 105447 transitions. [2020-04-17 22:52:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:36,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:36,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:36,900 INFO L225 Difference]: With dead ends: 27548 [2020-04-17 22:52:36,901 INFO L226 Difference]: Without dead ends: 27521 [2020-04-17 22:52:36,901 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 22:52:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27521 states. [2020-04-17 22:52:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27521 to 7841. [2020-04-17 22:52:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7841 states. [2020-04-17 22:52:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7841 states to 7841 states and 35578 transitions. [2020-04-17 22:52:37,317 INFO L78 Accepts]: Start accepts. Automaton has 7841 states and 35578 transitions. Word has length 25 [2020-04-17 22:52:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:37,318 INFO L479 AbstractCegarLoop]: Abstraction has 7841 states and 35578 transitions. [2020-04-17 22:52:37,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 7841 states and 35578 transitions. [2020-04-17 22:52:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:37,321 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:37,321 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 22:52:37,321 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 22:52:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:37,321 INFO L82 PathProgramCache]: Analyzing trace with hash -864117370, now seen corresponding path program 5 times [2020-04-17 22:52:37,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:37,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419404663] [2020-04-17 22:52:37,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:37,496 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 22:52:37,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419404663] [2020-04-17 22:52:37,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:37,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:37,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412963708] [2020-04-17 22:52:37,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:37,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:37,497 INFO L87 Difference]: Start difference. First operand 7841 states and 35578 transitions. Second operand 9 states. [2020-04-17 22:52:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:38,334 INFO L93 Difference]: Finished difference Result 27167 states and 103966 transitions. [2020-04-17 22:52:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:38,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:38,406 INFO L225 Difference]: With dead ends: 27167 [2020-04-17 22:52:38,406 INFO L226 Difference]: Without dead ends: 27147 [2020-04-17 22:52:38,406 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:52:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27147 states. [2020-04-17 22:52:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27147 to 7743. [2020-04-17 22:52:38,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7743 states. [2020-04-17 22:52:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7743 states to 7743 states and 35142 transitions. [2020-04-17 22:52:38,827 INFO L78 Accepts]: Start accepts. Automaton has 7743 states and 35142 transitions. Word has length 25 [2020-04-17 22:52:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:38,827 INFO L479 AbstractCegarLoop]: Abstraction has 7743 states and 35142 transitions. [2020-04-17 22:52:38,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 7743 states and 35142 transitions. [2020-04-17 22:52:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:38,830 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:38,830 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 22:52:38,830 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 22:52:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:38,831 INFO L82 PathProgramCache]: Analyzing trace with hash -877234772, now seen corresponding path program 6 times [2020-04-17 22:52:38,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:38,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427313862] [2020-04-17 22:52:38,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:38,887 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 22:52:38,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427313862] [2020-04-17 22:52:38,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:38,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:38,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315367661] [2020-04-17 22:52:38,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:38,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:38,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:38,889 INFO L87 Difference]: Start difference. First operand 7743 states and 35142 transitions. Second operand 9 states. [2020-04-17 22:52:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:39,735 INFO L93 Difference]: Finished difference Result 26955 states and 103085 transitions. [2020-04-17 22:52:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:39,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:39,795 INFO L225 Difference]: With dead ends: 26955 [2020-04-17 22:52:39,796 INFO L226 Difference]: Without dead ends: 26928 [2020-04-17 22:52:39,796 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 22:52:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26928 states. [2020-04-17 22:52:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26928 to 7532. [2020-04-17 22:52:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7532 states. [2020-04-17 22:52:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7532 states to 7532 states and 34256 transitions. [2020-04-17 22:52:40,195 INFO L78 Accepts]: Start accepts. Automaton has 7532 states and 34256 transitions. Word has length 25 [2020-04-17 22:52:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:40,195 INFO L479 AbstractCegarLoop]: Abstraction has 7532 states and 34256 transitions. [2020-04-17 22:52:40,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 7532 states and 34256 transitions. [2020-04-17 22:52:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:40,199 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:40,199 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 22:52:40,199 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 22:52:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash -877241530, now seen corresponding path program 6 times [2020-04-17 22:52:40,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:40,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001856473] [2020-04-17 22:52:40,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:40,265 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 22:52:40,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001856473] [2020-04-17 22:52:40,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:40,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:52:40,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132334678] [2020-04-17 22:52:40,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:52:40,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:40,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:52:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:52:40,267 INFO L87 Difference]: Start difference. First operand 7532 states and 34256 transitions. Second operand 9 states. [2020-04-17 22:52:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:41,260 INFO L93 Difference]: Finished difference Result 26632 states and 101828 transitions. [2020-04-17 22:52:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:52:41,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-04-17 22:52:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:41,332 INFO L225 Difference]: With dead ends: 26632 [2020-04-17 22:52:41,332 INFO L226 Difference]: Without dead ends: 26605 [2020-04-17 22:52:41,333 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 22:52:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26605 states. [2020-04-17 22:52:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26605 to 7269. [2020-04-17 22:52:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7269 states. [2020-04-17 22:52:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 33154 transitions. [2020-04-17 22:52:41,720 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 33154 transitions. Word has length 25 [2020-04-17 22:52:41,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:41,720 INFO L479 AbstractCegarLoop]: Abstraction has 7269 states and 33154 transitions. [2020-04-17 22:52:41,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:52:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 33154 transitions. [2020-04-17 22:52:41,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:52:41,723 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:41,724 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:41,724 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 22:52:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:41,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1311164244, now seen corresponding path program 1 times [2020-04-17 22:52:41,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:41,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67006113] [2020-04-17 22:52:41,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:41,761 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 22:52:41,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67006113] [2020-04-17 22:52:41,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:41,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:52:41,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169066782] [2020-04-17 22:52:41,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:52:41,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:41,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:52:41,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:52:41,763 INFO L87 Difference]: Start difference. First operand 7269 states and 33154 transitions. Second operand 5 states. [2020-04-17 22:52:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:41,905 INFO L93 Difference]: Finished difference Result 11919 states and 51979 transitions. [2020-04-17 22:52:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:52:41,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-04-17 22:52:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:41,936 INFO L225 Difference]: With dead ends: 11919 [2020-04-17 22:52:41,936 INFO L226 Difference]: Without dead ends: 11887 [2020-04-17 22:52:41,936 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 22:52:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11887 states. [2020-04-17 22:52:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11887 to 8560. [2020-04-17 22:52:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8560 states. [2020-04-17 22:52:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 38495 transitions. [2020-04-17 22:52:42,192 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 38495 transitions. Word has length 25 [2020-04-17 22:52:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:42,193 INFO L479 AbstractCegarLoop]: Abstraction has 8560 states and 38495 transitions. [2020-04-17 22:52:42,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:52:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 38495 transitions. [2020-04-17 22:52:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 22:52:42,197 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:42,197 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:42,197 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 22:52:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1986416772, now seen corresponding path program 1 times [2020-04-17 22:52:42,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:42,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527102968] [2020-04-17 22:52:42,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:52:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:52:42,218 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:52:42,218 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:52:42,218 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:52:42,219 WARN L363 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:52:42,219 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-04-17 22:52:42,234 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,234 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,234 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,234 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,234 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,235 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,235 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,235 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,235 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,235 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,235 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,236 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,236 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,236 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,236 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,236 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,236 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,236 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,237 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,237 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,237 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,237 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,237 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,237 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,237 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,238 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,238 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,238 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,238 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,238 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,238 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,238 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,239 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,239 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,239 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,239 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,239 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,239 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,239 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,240 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,240 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,240 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,240 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,240 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,240 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,240 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,241 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,241 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,241 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,241 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,241 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,241 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,241 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,242 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,242 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,242 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,242 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,242 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,242 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,242 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,243 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,243 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,243 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,243 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,243 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,243 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,243 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,244 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,244 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,244 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,244 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,244 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,244 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,245 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,245 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,245 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,245 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,245 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,245 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,245 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,245 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,246 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,246 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,246 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,246 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,246 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,246 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,246 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,246 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,247 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,247 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,247 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,247 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,247 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,247 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,247 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,248 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,248 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,248 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,248 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,248 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,248 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,249 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,249 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,249 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,249 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,249 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,260 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,261 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,261 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,261 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,261 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,262 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,263 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,263 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,263 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,263 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,264 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,264 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,264 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,265 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,265 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,266 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,266 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,266 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,266 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,267 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,268 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,268 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,268 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,268 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,268 WARN L315 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,270 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,270 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,270 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,270 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,270 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,270 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,271 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,272 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,272 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,272 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,272 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,272 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,273 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,274 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,274 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,274 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,274 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,274 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,275 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,275 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,276 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,276 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,276 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,276 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,277 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,277 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,277 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,278 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,278 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,278 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,279 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,279 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,279 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,279 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,280 WARN L315 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,280 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:52:42,281 INFO L251 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-04-17 22:52:42,281 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:52:42,281 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:52:42,281 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:52:42,281 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:52:42,282 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:52:42,282 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:52:42,282 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:52:42,282 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:52:42,283 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 138 transitions, 396 flow [2020-04-17 22:52:42,283 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 156 places, 138 transitions, 396 flow [2020-04-17 22:52:42,300 INFO L129 PetriNetUnfolder]: 9/173 cut-off events. [2020-04-17 22:52:42,301 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2020-04-17 22:52:42,302 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 22:52:42,308 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 156 places, 138 transitions, 396 flow [2020-04-17 22:52:42,325 INFO L129 PetriNetUnfolder]: 9/173 cut-off events. [2020-04-17 22:52:42,326 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2020-04-17 22:52:42,327 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 22:52:42,332 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2832 [2020-04-17 22:52:42,333 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:52:42,959 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-04-17 22:52:44,284 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-04-17 22:52:44,597 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-04-17 22:52:44,697 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3678 [2020-04-17 22:52:44,697 INFO L214 etLargeBlockEncoding]: Total number of compositions: 113 [2020-04-17 22:52:44,697 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 45 transitions, 210 flow [2020-04-17 22:52:46,405 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 18584 states. [2020-04-17 22:52:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 18584 states. [2020-04-17 22:52:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 22:52:46,406 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:46,406 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 22:52:46,406 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 22:52:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1298891, now seen corresponding path program 1 times [2020-04-17 22:52:46,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:46,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242739089] [2020-04-17 22:52:46,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:46,425 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 22:52:46,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242739089] [2020-04-17 22:52:46,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:46,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:52:46,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163750127] [2020-04-17 22:52:46,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:52:46,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:46,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:52:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:52:46,427 INFO L87 Difference]: Start difference. First operand 18584 states. Second operand 3 states. [2020-04-17 22:52:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:46,589 INFO L93 Difference]: Finished difference Result 17885 states and 92755 transitions. [2020-04-17 22:52:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:52:46,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 22:52:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:46,648 INFO L225 Difference]: With dead ends: 17885 [2020-04-17 22:52:46,648 INFO L226 Difference]: Without dead ends: 16791 [2020-04-17 22:52:46,648 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 22:52:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16791 states. [2020-04-17 22:52:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16791 to 16791. [2020-04-17 22:52:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16791 states. [2020-04-17 22:52:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 86558 transitions. [2020-04-17 22:52:47,470 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 86558 transitions. Word has length 3 [2020-04-17 22:52:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:47,470 INFO L479 AbstractCegarLoop]: Abstraction has 16791 states and 86558 transitions. [2020-04-17 22:52:47,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:52:47,470 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 86558 transitions. [2020-04-17 22:52:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:52:47,470 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:47,471 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:47,471 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 22:52:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:47,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1091574945, now seen corresponding path program 1 times [2020-04-17 22:52:47,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:47,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232617696] [2020-04-17 22:52:47,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:47,498 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 22:52:47,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232617696] [2020-04-17 22:52:47,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:47,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:52:47,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886915463] [2020-04-17 22:52:47,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:52:47,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:52:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:52:47,500 INFO L87 Difference]: Start difference. First operand 16791 states and 86558 transitions. Second operand 5 states. [2020-04-17 22:52:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:47,765 INFO L93 Difference]: Finished difference Result 30985 states and 150574 transitions. [2020-04-17 22:52:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:52:47,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 22:52:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:47,869 INFO L225 Difference]: With dead ends: 30985 [2020-04-17 22:52:47,870 INFO L226 Difference]: Without dead ends: 30977 [2020-04-17 22:52:47,870 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 22:52:50,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30977 states. [2020-04-17 22:52:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30977 to 19868. [2020-04-17 22:52:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19868 states. [2020-04-17 22:52:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19868 states to 19868 states and 103363 transitions. [2020-04-17 22:52:50,649 INFO L78 Accepts]: Start accepts. Automaton has 19868 states and 103363 transitions. Word has length 9 [2020-04-17 22:52:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:50,649 INFO L479 AbstractCegarLoop]: Abstraction has 19868 states and 103363 transitions. [2020-04-17 22:52:50,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:52:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 19868 states and 103363 transitions. [2020-04-17 22:52:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:52:50,649 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:50,650 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:50,650 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 22:52:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:50,650 INFO L82 PathProgramCache]: Analyzing trace with hash -231509072, now seen corresponding path program 1 times [2020-04-17 22:52:50,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:50,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172029635] [2020-04-17 22:52:50,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:50,674 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 22:52:50,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172029635] [2020-04-17 22:52:50,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:50,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:52:50,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986685441] [2020-04-17 22:52:50,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:52:50,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:50,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:52:50,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:52:50,676 INFO L87 Difference]: Start difference. First operand 19868 states and 103363 transitions. Second operand 5 states. [2020-04-17 22:52:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:50,967 INFO L93 Difference]: Finished difference Result 36296 states and 178836 transitions. [2020-04-17 22:52:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:52:50,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-17 22:52:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:51,078 INFO L225 Difference]: With dead ends: 36296 [2020-04-17 22:52:51,078 INFO L226 Difference]: Without dead ends: 36280 [2020-04-17 22:52:51,079 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 22:52:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36280 states. [2020-04-17 22:52:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36280 to 23806. [2020-04-17 22:52:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23806 states. [2020-04-17 22:52:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23806 states to 23806 states and 125455 transitions. [2020-04-17 22:52:52,314 INFO L78 Accepts]: Start accepts. Automaton has 23806 states and 125455 transitions. Word has length 13 [2020-04-17 22:52:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:52,315 INFO L479 AbstractCegarLoop]: Abstraction has 23806 states and 125455 transitions. [2020-04-17 22:52:52,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:52:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 23806 states and 125455 transitions. [2020-04-17 22:52:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:52:52,315 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:52,315 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:52,315 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 22:52:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash -588793474, now seen corresponding path program 1 times [2020-04-17 22:52:52,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:52,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923558603] [2020-04-17 22:52:52,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:52,356 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 22:52:52,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923558603] [2020-04-17 22:52:52,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458956474] [2020-04-17 22:52:52,357 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 22:52:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:52,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:52:52,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:52:52,507 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 22:52:52,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:52:52,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:52:52,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361224798] [2020-04-17 22:52:52,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:52:52,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:52:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:52:52,509 INFO L87 Difference]: Start difference. First operand 23806 states and 125455 transitions. Second operand 12 states. [2020-04-17 22:52:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:53,173 INFO L93 Difference]: Finished difference Result 56720 states and 262685 transitions. [2020-04-17 22:52:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:53,174 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 22:52:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:53,361 INFO L225 Difference]: With dead ends: 56720 [2020-04-17 22:52:53,362 INFO L226 Difference]: Without dead ends: 56704 [2020-04-17 22:52:53,362 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 22:52:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56704 states. [2020-04-17 22:52:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56704 to 23629. [2020-04-17 22:52:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23629 states. [2020-04-17 22:52:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23629 states to 23629 states and 124418 transitions. [2020-04-17 22:52:57,153 INFO L78 Accepts]: Start accepts. Automaton has 23629 states and 124418 transitions. Word has length 15 [2020-04-17 22:52:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:57,154 INFO L479 AbstractCegarLoop]: Abstraction has 23629 states and 124418 transitions. [2020-04-17 22:52:57,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:52:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 23629 states and 124418 transitions. [2020-04-17 22:52:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:52:57,154 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:57,154 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:57,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:52:57,355 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 22:52:57,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash 858081470, now seen corresponding path program 2 times [2020-04-17 22:52:57,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:57,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156304762] [2020-04-17 22:52:57,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:57,398 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 22:52:57,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156304762] [2020-04-17 22:52:57,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:57,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:52:57,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209557190] [2020-04-17 22:52:57,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:52:57,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:57,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:52:57,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:52:57,399 INFO L87 Difference]: Start difference. First operand 23629 states and 124418 transitions. Second operand 7 states. [2020-04-17 22:52:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:52:58,029 INFO L93 Difference]: Finished difference Result 58078 states and 269185 transitions. [2020-04-17 22:52:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:52:58,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-04-17 22:52:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:52:58,198 INFO L225 Difference]: With dead ends: 58078 [2020-04-17 22:52:58,198 INFO L226 Difference]: Without dead ends: 58061 [2020-04-17 22:52:58,199 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 22:52:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58061 states. [2020-04-17 22:52:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58061 to 23109. [2020-04-17 22:52:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23109 states. [2020-04-17 22:52:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23109 states to 23109 states and 121651 transitions. [2020-04-17 22:52:59,790 INFO L78 Accepts]: Start accepts. Automaton has 23109 states and 121651 transitions. Word has length 15 [2020-04-17 22:52:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:52:59,790 INFO L479 AbstractCegarLoop]: Abstraction has 23109 states and 121651 transitions. [2020-04-17 22:52:59,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:52:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 23109 states and 121651 transitions. [2020-04-17 22:52:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:52:59,791 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:52:59,791 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:52:59,791 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 22:52:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:52:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 704376303, now seen corresponding path program 1 times [2020-04-17 22:52:59,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:52:59,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000988361] [2020-04-17 22:52:59,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:52:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:52:59,819 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 22:52:59,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000988361] [2020-04-17 22:52:59,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:52:59,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:52:59,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421801378] [2020-04-17 22:52:59,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:52:59,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:52:59,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:52:59,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:52:59,820 INFO L87 Difference]: Start difference. First operand 23109 states and 121651 transitions. Second operand 5 states. [2020-04-17 22:53:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:00,744 INFO L93 Difference]: Finished difference Result 41885 states and 209629 transitions. [2020-04-17 22:53:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:53:00,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-04-17 22:53:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:00,876 INFO L225 Difference]: With dead ends: 41885 [2020-04-17 22:53:00,876 INFO L226 Difference]: Without dead ends: 41856 [2020-04-17 22:53:00,876 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 22:53:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41856 states. [2020-04-17 22:53:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41856 to 28237. [2020-04-17 22:53:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28237 states. [2020-04-17 22:53:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28237 states to 28237 states and 150261 transitions. [2020-04-17 22:53:02,233 INFO L78 Accepts]: Start accepts. Automaton has 28237 states and 150261 transitions. Word has length 17 [2020-04-17 22:53:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:02,234 INFO L479 AbstractCegarLoop]: Abstraction has 28237 states and 150261 transitions. [2020-04-17 22:53:02,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:53:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 28237 states and 150261 transitions. [2020-04-17 22:53:02,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:53:02,234 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:02,235 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:02,235 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 22:53:02,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:02,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1918672061, now seen corresponding path program 1 times [2020-04-17 22:53:02,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:02,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701535976] [2020-04-17 22:53:02,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:02,276 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 22:53:02,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701535976] [2020-04-17 22:53:02,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548622281] [2020-04-17 22:53:02,277 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 22:53:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:02,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:53:02,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:02,428 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 22:53:02,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:02,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:53:02,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714677017] [2020-04-17 22:53:02,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:53:02,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:02,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:53:02,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:53:02,429 INFO L87 Difference]: Start difference. First operand 28237 states and 150261 transitions. Second operand 12 states. [2020-04-17 22:53:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:03,094 INFO L93 Difference]: Finished difference Result 66831 states and 314874 transitions. [2020-04-17 22:53:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:03,094 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:53:03,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:03,313 INFO L225 Difference]: With dead ends: 66831 [2020-04-17 22:53:03,313 INFO L226 Difference]: Without dead ends: 66807 [2020-04-17 22:53:03,313 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 22:53:04,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66807 states. [2020-04-17 22:53:05,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66807 to 28673. [2020-04-17 22:53:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28673 states. [2020-04-17 22:53:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28673 states to 28673 states and 152375 transitions. [2020-04-17 22:53:05,787 INFO L78 Accepts]: Start accepts. Automaton has 28673 states and 152375 transitions. Word has length 19 [2020-04-17 22:53:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:05,787 INFO L479 AbstractCegarLoop]: Abstraction has 28673 states and 152375 transitions. [2020-04-17 22:53:05,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:53:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 28673 states and 152375 transitions. [2020-04-17 22:53:05,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:53:05,788 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:05,788 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:05,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:05,992 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 22:53:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:05,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1064014108, now seen corresponding path program 1 times [2020-04-17 22:53:05,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:05,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263026992] [2020-04-17 22:53:05,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:06,032 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 22:53:06,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263026992] [2020-04-17 22:53:06,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535900492] [2020-04-17 22:53:06,033 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 22:53:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:06,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:53:06,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:06,168 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 22:53:06,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:06,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:53:06,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040024110] [2020-04-17 22:53:06,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:53:06,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:06,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:53:06,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:53:06,169 INFO L87 Difference]: Start difference. First operand 28673 states and 152375 transitions. Second operand 12 states. [2020-04-17 22:53:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:06,892 INFO L93 Difference]: Finished difference Result 69484 states and 328264 transitions. [2020-04-17 22:53:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:06,892 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-04-17 22:53:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:07,130 INFO L225 Difference]: With dead ends: 69484 [2020-04-17 22:53:07,130 INFO L226 Difference]: Without dead ends: 69451 [2020-04-17 22:53:07,130 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 22:53:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69451 states. [2020-04-17 22:53:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69451 to 28873. [2020-04-17 22:53:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28873 states. [2020-04-17 22:53:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28873 states to 28873 states and 153454 transitions. [2020-04-17 22:53:12,311 INFO L78 Accepts]: Start accepts. Automaton has 28873 states and 153454 transitions. Word has length 19 [2020-04-17 22:53:12,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:12,311 INFO L479 AbstractCegarLoop]: Abstraction has 28873 states and 153454 transitions. [2020-04-17 22:53:12,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:53:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 28873 states and 153454 transitions. [2020-04-17 22:53:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:53:12,312 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:12,313 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:12,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:12,513 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 22:53:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:12,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1699177508, now seen corresponding path program 2 times [2020-04-17 22:53:12,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:12,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643500194] [2020-04-17 22:53:12,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:12,553 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 22:53:12,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643500194] [2020-04-17 22:53:12,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:12,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:53:12,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299004832] [2020-04-17 22:53:12,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:53:12,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:12,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:53:12,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:53:12,556 INFO L87 Difference]: Start difference. First operand 28873 states and 153454 transitions. Second operand 7 states. [2020-04-17 22:53:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:13,269 INFO L93 Difference]: Finished difference Result 70510 states and 333491 transitions. [2020-04-17 22:53:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:13,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:53:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:13,536 INFO L225 Difference]: With dead ends: 70510 [2020-04-17 22:53:13,536 INFO L226 Difference]: Without dead ends: 70477 [2020-04-17 22:53:13,536 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 22:53:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70477 states. [2020-04-17 22:53:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70477 to 28942. [2020-04-17 22:53:15,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28942 states. [2020-04-17 22:53:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28942 states to 28942 states and 153921 transitions. [2020-04-17 22:53:15,419 INFO L78 Accepts]: Start accepts. Automaton has 28942 states and 153921 transitions. Word has length 19 [2020-04-17 22:53:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:15,419 INFO L479 AbstractCegarLoop]: Abstraction has 28942 states and 153921 transitions. [2020-04-17 22:53:15,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:53:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 28942 states and 153921 transitions. [2020-04-17 22:53:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 22:53:15,420 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:15,420 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:15,420 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 22:53:15,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:15,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1699205315, now seen corresponding path program 2 times [2020-04-17 22:53:15,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:15,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933648924] [2020-04-17 22:53:15,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:15,462 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 22:53:15,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933648924] [2020-04-17 22:53:15,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:15,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:53:15,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056131707] [2020-04-17 22:53:15,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:53:15,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:15,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:53:15,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:53:15,465 INFO L87 Difference]: Start difference. First operand 28942 states and 153921 transitions. Second operand 7 states. [2020-04-17 22:53:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:16,670 INFO L93 Difference]: Finished difference Result 70096 states and 331298 transitions. [2020-04-17 22:53:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:16,671 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-04-17 22:53:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:16,886 INFO L225 Difference]: With dead ends: 70096 [2020-04-17 22:53:16,886 INFO L226 Difference]: Without dead ends: 70063 [2020-04-17 22:53:16,886 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 22:53:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70063 states. [2020-04-17 22:53:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70063 to 29094. [2020-04-17 22:53:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29094 states. [2020-04-17 22:53:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29094 states to 29094 states and 154883 transitions. [2020-04-17 22:53:18,638 INFO L78 Accepts]: Start accepts. Automaton has 29094 states and 154883 transitions. Word has length 19 [2020-04-17 22:53:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:18,638 INFO L479 AbstractCegarLoop]: Abstraction has 29094 states and 154883 transitions. [2020-04-17 22:53:18,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:53:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 29094 states and 154883 transitions. [2020-04-17 22:53:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:18,639 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:18,640 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 22:53:18,640 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 22:53:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash -228866966, now seen corresponding path program 1 times [2020-04-17 22:53:18,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:18,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870204223] [2020-04-17 22:53:18,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:18,703 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 22:53:18,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870204223] [2020-04-17 22:53:18,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050953240] [2020-04-17 22:53:18,703 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 22:53:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:18,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:53:18,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:18,888 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 22:53:18,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:18,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:53:18,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746292827] [2020-04-17 22:53:18,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:53:18,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:18,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:53:18,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:53:18,890 INFO L87 Difference]: Start difference. First operand 29094 states and 154883 transitions. Second operand 16 states. [2020-04-17 22:53:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:20,922 INFO L93 Difference]: Finished difference Result 100731 states and 448596 transitions. [2020-04-17 22:53:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:20,923 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:53:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:21,292 INFO L225 Difference]: With dead ends: 100731 [2020-04-17 22:53:21,292 INFO L226 Difference]: Without dead ends: 100715 [2020-04-17 22:53:21,292 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 22:53:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100715 states. [2020-04-17 22:53:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100715 to 28719. [2020-04-17 22:53:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28719 states. [2020-04-17 22:53:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28719 states to 28719 states and 152760 transitions. [2020-04-17 22:53:23,538 INFO L78 Accepts]: Start accepts. Automaton has 28719 states and 152760 transitions. Word has length 21 [2020-04-17 22:53:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:23,538 INFO L479 AbstractCegarLoop]: Abstraction has 28719 states and 152760 transitions. [2020-04-17 22:53:23,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:53:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 28719 states and 152760 transitions. [2020-04-17 22:53:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:23,539 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:23,539 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 22:53:23,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:23,740 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 22:53:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:23,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1302908714, now seen corresponding path program 2 times [2020-04-17 22:53:23,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:23,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067213655] [2020-04-17 22:53:23,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:23,797 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 22:53:23,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067213655] [2020-04-17 22:53:23,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349423910] [2020-04-17 22:53:23,798 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 22:53:23,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:53:23,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:53:23,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:53:23,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:23,976 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 22:53:23,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:23,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:53:23,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58927192] [2020-04-17 22:53:23,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:53:23,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:23,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:53:23,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:53:23,978 INFO L87 Difference]: Start difference. First operand 28719 states and 152760 transitions. Second operand 16 states. [2020-04-17 22:53:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:25,605 INFO L93 Difference]: Finished difference Result 99876 states and 444348 transitions. [2020-04-17 22:53:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:25,606 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:53:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:25,906 INFO L225 Difference]: With dead ends: 99876 [2020-04-17 22:53:25,906 INFO L226 Difference]: Without dead ends: 99855 [2020-04-17 22:53:25,907 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 22:53:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99855 states. [2020-04-17 22:53:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99855 to 28343. [2020-04-17 22:53:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28343 states. [2020-04-17 22:53:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 150639 transitions. [2020-04-17 22:53:31,386 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 150639 transitions. Word has length 21 [2020-04-17 22:53:31,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:31,386 INFO L479 AbstractCegarLoop]: Abstraction has 28343 states and 150639 transitions. [2020-04-17 22:53:31,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:53:31,386 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 150639 transitions. [2020-04-17 22:53:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:31,387 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:31,387 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 22:53:31,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:31,588 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 22:53:31,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1149181014, now seen corresponding path program 3 times [2020-04-17 22:53:31,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:31,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238518229] [2020-04-17 22:53:31,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:31,646 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 22:53:31,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238518229] [2020-04-17 22:53:31,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378361100] [2020-04-17 22:53:31,647 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 22:53:31,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:53:31,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:53:31,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:53:31,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:31,829 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 22:53:31,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:31,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:53:31,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134584667] [2020-04-17 22:53:31,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:53:31,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:31,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:53:31,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:53:31,831 INFO L87 Difference]: Start difference. First operand 28343 states and 150639 transitions. Second operand 16 states. [2020-04-17 22:53:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:33,259 INFO L93 Difference]: Finished difference Result 100071 states and 445291 transitions. [2020-04-17 22:53:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:33,259 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:53:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:33,561 INFO L225 Difference]: With dead ends: 100071 [2020-04-17 22:53:33,561 INFO L226 Difference]: Without dead ends: 100055 [2020-04-17 22:53:33,561 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 22:53:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100055 states. [2020-04-17 22:53:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100055 to 27654. [2020-04-17 22:53:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27654 states. [2020-04-17 22:53:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27654 states to 27654 states and 147080 transitions. [2020-04-17 22:53:36,272 INFO L78 Accepts]: Start accepts. Automaton has 27654 states and 147080 transitions. Word has length 21 [2020-04-17 22:53:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:36,273 INFO L479 AbstractCegarLoop]: Abstraction has 27654 states and 147080 transitions. [2020-04-17 22:53:36,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:53:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 27654 states and 147080 transitions. [2020-04-17 22:53:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:36,274 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:36,274 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 22:53:36,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:36,475 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 22:53:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:36,475 INFO L82 PathProgramCache]: Analyzing trace with hash 315341610, now seen corresponding path program 4 times [2020-04-17 22:53:36,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:36,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240580314] [2020-04-17 22:53:36,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:36,538 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 22:53:36,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240580314] [2020-04-17 22:53:36,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085069733] [2020-04-17 22:53:36,539 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 22:53:36,635 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:53:36,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:53:36,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:53:36,637 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:36,712 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 22:53:36,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:36,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:53:36,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066949891] [2020-04-17 22:53:36,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:53:36,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:36,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:53:36,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:53:36,715 INFO L87 Difference]: Start difference. First operand 27654 states and 147080 transitions. Second operand 16 states. [2020-04-17 22:53:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:38,072 INFO L93 Difference]: Finished difference Result 99523 states and 442763 transitions. [2020-04-17 22:53:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:38,073 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-17 22:53:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:38,392 INFO L225 Difference]: With dead ends: 99523 [2020-04-17 22:53:38,392 INFO L226 Difference]: Without dead ends: 99502 [2020-04-17 22:53:38,392 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 22:53:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99502 states. [2020-04-17 22:53:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99502 to 27278. [2020-04-17 22:53:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27278 states. [2020-04-17 22:53:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27278 states to 27278 states and 144959 transitions. [2020-04-17 22:53:41,165 INFO L78 Accepts]: Start accepts. Automaton has 27278 states and 144959 transitions. Word has length 21 [2020-04-17 22:53:41,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:41,165 INFO L479 AbstractCegarLoop]: Abstraction has 27278 states and 144959 transitions. [2020-04-17 22:53:41,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:53:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 27278 states and 144959 transitions. [2020-04-17 22:53:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:41,166 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:41,167 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 22:53:41,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:41,370 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 22:53:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:41,370 INFO L82 PathProgramCache]: Analyzing trace with hash -822012438, now seen corresponding path program 5 times [2020-04-17 22:53:41,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:41,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075692104] [2020-04-17 22:53:41,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:41,425 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 22:53:41,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075692104] [2020-04-17 22:53:41,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:41,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:53:41,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501432508] [2020-04-17 22:53:41,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:53:41,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:41,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:53:41,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:53:41,426 INFO L87 Difference]: Start difference. First operand 27278 states and 144959 transitions. Second operand 9 states. [2020-04-17 22:53:42,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:42,770 INFO L93 Difference]: Finished difference Result 99710 states and 443686 transitions. [2020-04-17 22:53:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:42,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:53:42,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:43,067 INFO L225 Difference]: With dead ends: 99710 [2020-04-17 22:53:43,067 INFO L226 Difference]: Without dead ends: 99694 [2020-04-17 22:53:43,067 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 22:53:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99694 states. [2020-04-17 22:53:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99694 to 26597. [2020-04-17 22:53:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26597 states. [2020-04-17 22:53:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26597 states to 26597 states and 141420 transitions. [2020-04-17 22:53:45,730 INFO L78 Accepts]: Start accepts. Automaton has 26597 states and 141420 transitions. Word has length 21 [2020-04-17 22:53:45,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:45,730 INFO L479 AbstractCegarLoop]: Abstraction has 26597 states and 141420 transitions. [2020-04-17 22:53:45,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:53:45,730 INFO L276 IsEmpty]: Start isEmpty. Operand 26597 states and 141420 transitions. [2020-04-17 22:53:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:45,731 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:45,731 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 22:53:45,731 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 22:53:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:45,732 INFO L82 PathProgramCache]: Analyzing trace with hash -848707158, now seen corresponding path program 6 times [2020-04-17 22:53:45,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:45,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316911572] [2020-04-17 22:53:45,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:45,793 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 22:53:45,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316911572] [2020-04-17 22:53:45,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:45,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-17 22:53:45,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404404759] [2020-04-17 22:53:45,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:53:45,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:45,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:53:45,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:53:45,795 INFO L87 Difference]: Start difference. First operand 26597 states and 141420 transitions. Second operand 9 states. [2020-04-17 22:53:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:47,100 INFO L93 Difference]: Finished difference Result 98863 states and 439458 transitions. [2020-04-17 22:53:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:53:47,100 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-04-17 22:53:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:47,388 INFO L225 Difference]: With dead ends: 98863 [2020-04-17 22:53:47,388 INFO L226 Difference]: Without dead ends: 98841 [2020-04-17 22:53:47,389 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 22:53:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98841 states. [2020-04-17 22:53:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98841 to 25744. [2020-04-17 22:53:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25744 states. [2020-04-17 22:53:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25744 states to 25744 states and 137181 transitions. [2020-04-17 22:53:49,963 INFO L78 Accepts]: Start accepts. Automaton has 25744 states and 137181 transitions. Word has length 21 [2020-04-17 22:53:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:49,963 INFO L479 AbstractCegarLoop]: Abstraction has 25744 states and 137181 transitions. [2020-04-17 22:53:49,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:53:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 25744 states and 137181 transitions. [2020-04-17 22:53:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 22:53:49,964 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:49,965 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:49,965 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 22:53:49,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:49,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1818695965, now seen corresponding path program 1 times [2020-04-17 22:53:49,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:49,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68866916] [2020-04-17 22:53:49,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:50,007 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 22:53:50,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68866916] [2020-04-17 22:53:50,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:53:50,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:53:50,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259747905] [2020-04-17 22:53:50,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:53:50,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:50,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:53:50,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:53:50,008 INFO L87 Difference]: Start difference. First operand 25744 states and 137181 transitions. Second operand 5 states. [2020-04-17 22:53:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:50,334 INFO L93 Difference]: Finished difference Result 46463 states and 236107 transitions. [2020-04-17 22:53:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:53:50,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-04-17 22:53:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:50,471 INFO L225 Difference]: With dead ends: 46463 [2020-04-17 22:53:50,471 INFO L226 Difference]: Without dead ends: 46417 [2020-04-17 22:53:50,471 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 22:53:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46417 states. [2020-04-17 22:53:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46417 to 31960. [2020-04-17 22:53:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31960 states. [2020-04-17 22:53:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31960 states to 31960 states and 171209 transitions. [2020-04-17 22:53:52,205 INFO L78 Accepts]: Start accepts. Automaton has 31960 states and 171209 transitions. Word has length 21 [2020-04-17 22:53:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:52,205 INFO L479 AbstractCegarLoop]: Abstraction has 31960 states and 171209 transitions. [2020-04-17 22:53:52,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:53:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 31960 states and 171209 transitions. [2020-04-17 22:53:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:53:52,206 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:52,207 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:52,207 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 22:53:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:52,207 INFO L82 PathProgramCache]: Analyzing trace with hash 605532395, now seen corresponding path program 1 times [2020-04-17 22:53:52,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:52,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4958346] [2020-04-17 22:53:52,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:52,243 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 22:53:52,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4958346] [2020-04-17 22:53:52,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269562241] [2020-04-17 22:53:52,244 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 22:53:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:52,336 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:53:52,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:52,401 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 22:53:52,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:52,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:53:52,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808152212] [2020-04-17 22:53:52,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:53:52,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:53:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:53:52,402 INFO L87 Difference]: Start difference. First operand 31960 states and 171209 transitions. Second operand 12 states. [2020-04-17 22:53:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:53,196 INFO L93 Difference]: Finished difference Result 75380 states and 361389 transitions. [2020-04-17 22:53:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:53,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:53:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:53,418 INFO L225 Difference]: With dead ends: 75380 [2020-04-17 22:53:53,418 INFO L226 Difference]: Without dead ends: 75344 [2020-04-17 22:53:53,418 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 22:53:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75344 states. [2020-04-17 22:53:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75344 to 32974. [2020-04-17 22:53:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32974 states. [2020-04-17 22:53:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32974 states to 32974 states and 176363 transitions. [2020-04-17 22:53:55,878 INFO L78 Accepts]: Start accepts. Automaton has 32974 states and 176363 transitions. Word has length 23 [2020-04-17 22:53:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:55,878 INFO L479 AbstractCegarLoop]: Abstraction has 32974 states and 176363 transitions. [2020-04-17 22:53:55,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:53:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 32974 states and 176363 transitions. [2020-04-17 22:53:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:53:55,880 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:55,880 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:53:56,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:53:56,081 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 22:53:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:53:56,082 INFO L82 PathProgramCache]: Analyzing trace with hash 768040394, now seen corresponding path program 1 times [2020-04-17 22:53:56,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:53:56,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988986536] [2020-04-17 22:53:56,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:53:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:56,125 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 22:53:56,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988986536] [2020-04-17 22:53:56,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898862915] [2020-04-17 22:53:56,125 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 22:53:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:53:56,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:53:56,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:53:56,275 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 22:53:56,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:53:56,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:53:56,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918297949] [2020-04-17 22:53:56,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:53:56,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:53:56,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:53:56,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:53:56,278 INFO L87 Difference]: Start difference. First operand 32974 states and 176363 transitions. Second operand 12 states. [2020-04-17 22:53:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:53:57,021 INFO L93 Difference]: Finished difference Result 79487 states and 381757 transitions. [2020-04-17 22:53:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:53:57,021 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:53:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:53:57,298 INFO L225 Difference]: With dead ends: 79487 [2020-04-17 22:53:57,299 INFO L226 Difference]: Without dead ends: 79445 [2020-04-17 22:53:57,299 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 22:53:58,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79445 states. [2020-04-17 22:53:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79445 to 33981. [2020-04-17 22:53:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33981 states. [2020-04-17 22:53:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33981 states to 33981 states and 181710 transitions. [2020-04-17 22:53:59,846 INFO L78 Accepts]: Start accepts. Automaton has 33981 states and 181710 transitions. Word has length 23 [2020-04-17 22:53:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:53:59,846 INFO L479 AbstractCegarLoop]: Abstraction has 33981 states and 181710 transitions. [2020-04-17 22:53:59,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:53:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 33981 states and 181710 transitions. [2020-04-17 22:53:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:53:59,848 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:53:59,848 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:00,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:00,049 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 22:54:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1041867770, now seen corresponding path program 1 times [2020-04-17 22:54:00,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:00,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453645976] [2020-04-17 22:54:00,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:00,096 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 22:54:00,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453645976] [2020-04-17 22:54:00,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634057079] [2020-04-17 22:54:00,097 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 22:54:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:00,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:54:00,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:00,289 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 22:54:00,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:00,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:54:00,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083271221] [2020-04-17 22:54:00,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:54:00,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:00,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:54:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:54:00,291 INFO L87 Difference]: Start difference. First operand 33981 states and 181710 transitions. Second operand 12 states. [2020-04-17 22:54:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:01,011 INFO L93 Difference]: Finished difference Result 82728 states and 398553 transitions. [2020-04-17 22:54:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:54:01,011 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:54:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:01,272 INFO L225 Difference]: With dead ends: 82728 [2020-04-17 22:54:01,272 INFO L226 Difference]: Without dead ends: 82673 [2020-04-17 22:54:01,272 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 22:54:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82673 states. [2020-04-17 22:54:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82673 to 34821. [2020-04-17 22:54:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34821 states. [2020-04-17 22:54:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34821 states to 34821 states and 186422 transitions. [2020-04-17 22:54:04,036 INFO L78 Accepts]: Start accepts. Automaton has 34821 states and 186422 transitions. Word has length 23 [2020-04-17 22:54:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:04,037 INFO L479 AbstractCegarLoop]: Abstraction has 34821 states and 186422 transitions. [2020-04-17 22:54:04,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:54:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 34821 states and 186422 transitions. [2020-04-17 22:54:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:54:04,039 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:04,039 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:04,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:04,240 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 22:54:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:04,240 INFO L82 PathProgramCache]: Analyzing trace with hash -284839030, now seen corresponding path program 2 times [2020-04-17 22:54:04,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:04,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707370498] [2020-04-17 22:54:04,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:04,282 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 22:54:04,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707370498] [2020-04-17 22:54:04,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:54:04,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:54:04,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598012403] [2020-04-17 22:54:04,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:54:04,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:04,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:54:04,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:54:04,283 INFO L87 Difference]: Start difference. First operand 34821 states and 186422 transitions. Second operand 7 states. [2020-04-17 22:54:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:04,987 INFO L93 Difference]: Finished difference Result 83507 states and 402693 transitions. [2020-04-17 22:54:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:54:04,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:54:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:05,239 INFO L225 Difference]: With dead ends: 83507 [2020-04-17 22:54:05,239 INFO L226 Difference]: Without dead ends: 83452 [2020-04-17 22:54:05,239 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 22:54:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83452 states. [2020-04-17 22:54:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83452 to 35694. [2020-04-17 22:54:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35694 states. [2020-04-17 22:54:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35694 states to 35694 states and 191145 transitions. [2020-04-17 22:54:07,840 INFO L78 Accepts]: Start accepts. Automaton has 35694 states and 191145 transitions. Word has length 23 [2020-04-17 22:54:07,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:07,840 INFO L479 AbstractCegarLoop]: Abstraction has 35694 states and 191145 transitions. [2020-04-17 22:54:07,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:54:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 35694 states and 191145 transitions. [2020-04-17 22:54:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:54:07,842 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:07,842 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:07,842 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 22:54:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:07,842 INFO L82 PathProgramCache]: Analyzing trace with hash -284850438, now seen corresponding path program 2 times [2020-04-17 22:54:07,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:07,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871467089] [2020-04-17 22:54:07,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:07,883 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 22:54:07,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871467089] [2020-04-17 22:54:07,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:54:07,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:54:07,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536833510] [2020-04-17 22:54:07,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:54:07,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:07,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:54:07,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:54:07,885 INFO L87 Difference]: Start difference. First operand 35694 states and 191145 transitions. Second operand 7 states. [2020-04-17 22:54:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:08,628 INFO L93 Difference]: Finished difference Result 83523 states and 402462 transitions. [2020-04-17 22:54:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:54:08,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:54:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:08,887 INFO L225 Difference]: With dead ends: 83523 [2020-04-17 22:54:08,887 INFO L226 Difference]: Without dead ends: 83468 [2020-04-17 22:54:08,888 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 22:54:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83468 states. [2020-04-17 22:54:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83468 to 36306. [2020-04-17 22:54:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36306 states. [2020-04-17 22:54:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36306 states to 36306 states and 194552 transitions. [2020-04-17 22:54:11,498 INFO L78 Accepts]: Start accepts. Automaton has 36306 states and 194552 transitions. Word has length 23 [2020-04-17 22:54:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:11,498 INFO L479 AbstractCegarLoop]: Abstraction has 36306 states and 194552 transitions. [2020-04-17 22:54:11,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:54:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 36306 states and 194552 transitions. [2020-04-17 22:54:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:54:11,500 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:11,500 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:54:11,500 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 22:54:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash -284866837, now seen corresponding path program 2 times [2020-04-17 22:54:11,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:11,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818052991] [2020-04-17 22:54:11,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:11,539 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 22:54:11,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818052991] [2020-04-17 22:54:11,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:54:11,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:54:11,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149600712] [2020-04-17 22:54:11,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:54:11,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:11,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:54:11,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:54:11,540 INFO L87 Difference]: Start difference. First operand 36306 states and 194552 transitions. Second operand 7 states. [2020-04-17 22:54:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:12,227 INFO L93 Difference]: Finished difference Result 83918 states and 404136 transitions. [2020-04-17 22:54:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:54:12,228 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-04-17 22:54:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:12,481 INFO L225 Difference]: With dead ends: 83918 [2020-04-17 22:54:12,482 INFO L226 Difference]: Without dead ends: 83863 [2020-04-17 22:54:12,482 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 22:54:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83863 states. [2020-04-17 22:54:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83863 to 37062. [2020-04-17 22:54:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37062 states. [2020-04-17 22:54:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37062 states to 37062 states and 198528 transitions. [2020-04-17 22:54:15,152 INFO L78 Accepts]: Start accepts. Automaton has 37062 states and 198528 transitions. Word has length 23 [2020-04-17 22:54:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:15,152 INFO L479 AbstractCegarLoop]: Abstraction has 37062 states and 198528 transitions. [2020-04-17 22:54:15,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:54:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 37062 states and 198528 transitions. [2020-04-17 22:54:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:15,156 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:15,156 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 22:54:15,156 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 22:54:15,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:15,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1146013160, now seen corresponding path program 1 times [2020-04-17 22:54:15,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:15,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691826228] [2020-04-17 22:54:15,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:15,217 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 22:54:15,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691826228] [2020-04-17 22:54:15,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355351050] [2020-04-17 22:54:15,218 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 22:54:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:15,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:15,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:15,405 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 22:54:15,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:15,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:15,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542919129] [2020-04-17 22:54:15,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:15,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:15,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:15,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:15,407 INFO L87 Difference]: Start difference. First operand 37062 states and 198528 transitions. Second operand 16 states. [2020-04-17 22:54:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:17,072 INFO L93 Difference]: Finished difference Result 122892 states and 561130 transitions. [2020-04-17 22:54:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:17,073 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:17,452 INFO L225 Difference]: With dead ends: 122892 [2020-04-17 22:54:17,452 INFO L226 Difference]: Without dead ends: 122862 [2020-04-17 22:54:17,452 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 22:54:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122862 states. [2020-04-17 22:54:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122862 to 36727. [2020-04-17 22:54:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36727 states. [2020-04-17 22:54:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36727 states to 36727 states and 196466 transitions. [2020-04-17 22:54:20,721 INFO L78 Accepts]: Start accepts. Automaton has 36727 states and 196466 transitions. Word has length 25 [2020-04-17 22:54:20,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:20,721 INFO L479 AbstractCegarLoop]: Abstraction has 36727 states and 196466 transitions. [2020-04-17 22:54:20,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 36727 states and 196466 transitions. [2020-04-17 22:54:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:20,724 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:20,724 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 22:54:20,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:20,925 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 22:54:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash -872185784, now seen corresponding path program 1 times [2020-04-17 22:54:20,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:20,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673128247] [2020-04-17 22:54:20,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:20,982 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 22:54:20,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673128247] [2020-04-17 22:54:20,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130307183] [2020-04-17 22:54:20,983 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 22:54:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:21,078 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:21,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:21,171 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 22:54:21,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:21,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:21,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745712399] [2020-04-17 22:54:21,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:21,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:21,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:21,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:21,173 INFO L87 Difference]: Start difference. First operand 36727 states and 196466 transitions. Second operand 16 states. [2020-04-17 22:54:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:23,166 INFO L93 Difference]: Finished difference Result 121590 states and 554657 transitions. [2020-04-17 22:54:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:23,166 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:23,553 INFO L225 Difference]: With dead ends: 121590 [2020-04-17 22:54:23,553 INFO L226 Difference]: Without dead ends: 121560 [2020-04-17 22:54:23,553 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 22:54:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121560 states. [2020-04-17 22:54:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121560 to 36513. [2020-04-17 22:54:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36513 states. [2020-04-17 22:54:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36513 states to 36513 states and 195090 transitions. [2020-04-17 22:54:29,249 INFO L78 Accepts]: Start accepts. Automaton has 36513 states and 195090 transitions. Word has length 25 [2020-04-17 22:54:29,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:29,250 INFO L479 AbstractCegarLoop]: Abstraction has 36513 states and 195090 transitions. [2020-04-17 22:54:29,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand 36513 states and 195090 transitions. [2020-04-17 22:54:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:29,253 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:29,254 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 22:54:29,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:29,456 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 22:54:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:29,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2096074712, now seen corresponding path program 2 times [2020-04-17 22:54:29,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:29,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819855976] [2020-04-17 22:54:29,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:29,509 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 22:54:29,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819855976] [2020-04-17 22:54:29,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554052264] [2020-04-17 22:54:29,510 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 22:54:29,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:54:29,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:54:29,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:29,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:29,687 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 22:54:29,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:29,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:29,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581944879] [2020-04-17 22:54:29,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:29,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:29,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:29,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:29,689 INFO L87 Difference]: Start difference. First operand 36513 states and 195090 transitions. Second operand 16 states. [2020-04-17 22:54:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:31,151 INFO L93 Difference]: Finished difference Result 120395 states and 548664 transitions. [2020-04-17 22:54:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:31,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:31,494 INFO L225 Difference]: With dead ends: 120395 [2020-04-17 22:54:31,495 INFO L226 Difference]: Without dead ends: 120362 [2020-04-17 22:54:31,495 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 22:54:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120362 states. [2020-04-17 22:54:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120362 to 36444. [2020-04-17 22:54:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36444 states. [2020-04-17 22:54:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36444 states to 36444 states and 194571 transitions. [2020-04-17 22:54:34,725 INFO L78 Accepts]: Start accepts. Automaton has 36444 states and 194571 transitions. Word has length 25 [2020-04-17 22:54:34,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:34,725 INFO L479 AbstractCegarLoop]: Abstraction has 36444 states and 194571 transitions. [2020-04-17 22:54:34,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 36444 states and 194571 transitions. [2020-04-17 22:54:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:34,727 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:34,728 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 22:54:34,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:34,928 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 22:54:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:34,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2096063304, now seen corresponding path program 2 times [2020-04-17 22:54:34,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:34,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997328266] [2020-04-17 22:54:34,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:34,983 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 22:54:34,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997328266] [2020-04-17 22:54:34,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139055362] [2020-04-17 22:54:34,984 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 22:54:35,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:54:35,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:54:35,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:35,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:35,158 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 22:54:35,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:35,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:35,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393688887] [2020-04-17 22:54:35,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:35,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:35,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:35,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:35,159 INFO L87 Difference]: Start difference. First operand 36444 states and 194571 transitions. Second operand 16 states. [2020-04-17 22:54:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:38,408 INFO L93 Difference]: Finished difference Result 119346 states and 543724 transitions. [2020-04-17 22:54:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:38,408 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:38,758 INFO L225 Difference]: With dead ends: 119346 [2020-04-17 22:54:38,758 INFO L226 Difference]: Without dead ends: 119313 [2020-04-17 22:54:38,758 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 22:54:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119313 states. [2020-04-17 22:54:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119313 to 36040. [2020-04-17 22:54:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36040 states. [2020-04-17 22:54:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36040 states to 36040 states and 192287 transitions. [2020-04-17 22:54:41,741 INFO L78 Accepts]: Start accepts. Automaton has 36040 states and 192287 transitions. Word has length 25 [2020-04-17 22:54:41,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:41,741 INFO L479 AbstractCegarLoop]: Abstraction has 36040 states and 192287 transitions. [2020-04-17 22:54:41,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:41,742 INFO L276 IsEmpty]: Start isEmpty. Operand 36040 states and 192287 transitions. [2020-04-17 22:54:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:41,744 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:41,745 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 22:54:41,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:41,945 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 22:54:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:41,946 INFO L82 PathProgramCache]: Analyzing trace with hash 582269272, now seen corresponding path program 3 times [2020-04-17 22:54:41,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:41,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612397871] [2020-04-17 22:54:41,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:42,004 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 22:54:42,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612397871] [2020-04-17 22:54:42,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161585407] [2020-04-17 22:54:42,005 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 22:54:42,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:54:42,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:54:42,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:42,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:42,193 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 22:54:42,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:42,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:42,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12951182] [2020-04-17 22:54:42,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:42,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:42,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:42,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:42,195 INFO L87 Difference]: Start difference. First operand 36040 states and 192287 transitions. Second operand 16 states. [2020-04-17 22:54:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:43,802 INFO L93 Difference]: Finished difference Result 119770 states and 545635 transitions. [2020-04-17 22:54:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:43,803 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:44,148 INFO L225 Difference]: With dead ends: 119770 [2020-04-17 22:54:44,149 INFO L226 Difference]: Without dead ends: 119740 [2020-04-17 22:54:44,149 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 22:54:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119740 states. [2020-04-17 22:54:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119740 to 35471. [2020-04-17 22:54:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35471 states. [2020-04-17 22:54:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35471 states to 35471 states and 189238 transitions. [2020-04-17 22:54:49,742 INFO L78 Accepts]: Start accepts. Automaton has 35471 states and 189238 transitions. Word has length 25 [2020-04-17 22:54:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:49,743 INFO L479 AbstractCegarLoop]: Abstraction has 35471 states and 189238 transitions. [2020-04-17 22:54:49,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 35471 states and 189238 transitions. [2020-04-17 22:54:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:49,745 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:49,745 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 22:54:49,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:49,946 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 22:54:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:49,946 INFO L82 PathProgramCache]: Analyzing trace with hash 679178599, now seen corresponding path program 1 times [2020-04-17 22:54:49,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:49,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681335876] [2020-04-17 22:54:49,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:50,001 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 22:54:50,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681335876] [2020-04-17 22:54:50,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535541900] [2020-04-17 22:54:50,002 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 22:54:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:50,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:50,099 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:50,183 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 22:54:50,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:50,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:50,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798963621] [2020-04-17 22:54:50,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:50,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:50,185 INFO L87 Difference]: Start difference. First operand 35471 states and 189238 transitions. Second operand 16 states. [2020-04-17 22:54:52,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:54:52,359 INFO L93 Difference]: Finished difference Result 121131 states and 553230 transitions. [2020-04-17 22:54:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:54:52,360 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:54:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:54:52,759 INFO L225 Difference]: With dead ends: 121131 [2020-04-17 22:54:52,759 INFO L226 Difference]: Without dead ends: 121101 [2020-04-17 22:54:52,760 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 22:54:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121101 states. [2020-04-17 22:54:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121101 to 35374. [2020-04-17 22:54:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35374 states. [2020-04-17 22:54:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35374 states to 35374 states and 188534 transitions. [2020-04-17 22:54:59,035 INFO L78 Accepts]: Start accepts. Automaton has 35374 states and 188534 transitions. Word has length 25 [2020-04-17 22:54:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:54:59,035 INFO L479 AbstractCegarLoop]: Abstraction has 35374 states and 188534 transitions. [2020-04-17 22:54:59,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:54:59,035 INFO L276 IsEmpty]: Start isEmpty. Operand 35374 states and 188534 transitions. [2020-04-17 22:54:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 22:54:59,037 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:54:59,037 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 22:54:59,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:54:59,238 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 22:54:59,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:54:59,239 INFO L82 PathProgramCache]: Analyzing trace with hash -647539609, now seen corresponding path program 2 times [2020-04-17 22:54:59,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:54:59,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086595589] [2020-04-17 22:54:59,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:54:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:54:59,297 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 22:54:59,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086595589] [2020-04-17 22:54:59,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831923102] [2020-04-17 22:54:59,297 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 22:54:59,403 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:54:59,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:54:59,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:54:59,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:54:59,501 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 22:54:59,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:54:59,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:54:59,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023558904] [2020-04-17 22:54:59,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:54:59,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:54:59,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:54:59,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:54:59,503 INFO L87 Difference]: Start difference. First operand 35374 states and 188534 transitions. Second operand 16 states. [2020-04-17 22:55:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:55:01,008 INFO L93 Difference]: Finished difference Result 120194 states and 548412 transitions. [2020-04-17 22:55:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 22:55:01,008 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-04-17 22:55:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:55:01,352 INFO L225 Difference]: With dead ends: 120194 [2020-04-17 22:55:01,352 INFO L226 Difference]: Without dead ends: 120154 [2020-04-17 22:55:01,353 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 Received shutdown request... [2020-04-17 22:55:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120154 states. [2020-04-17 22:55:02,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:55:02,720 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 22:55:02,725 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 22:55:02,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 10:55:02 BasicIcfg [2020-04-17 22:55:02,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 22:55:02,727 INFO L168 Benchmark]: Toolchain (without parser) took 231355.73 ms. Allocated memory was 137.4 MB in the beginning and 2.9 GB in the end (delta: 2.8 GB). Free memory was 100.1 MB in the beginning and 868.5 MB in the end (delta: -768.4 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2020-04-17 22:55:02,727 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 22:55:02,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 707.63 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 98.1 MB in the beginning and 159.7 MB in the end (delta: -61.6 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-04-17 22:55:02,728 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.43 ms. Allocated memory is still 200.3 MB. Free memory was 159.7 MB in the beginning and 157.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-04-17 22:55:02,728 INFO L168 Benchmark]: Boogie Preprocessor took 59.85 ms. Allocated memory is still 200.3 MB. Free memory was 157.0 MB in the beginning and 155.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 22:55:02,728 INFO L168 Benchmark]: RCFGBuilder took 534.54 ms. Allocated memory is still 200.3 MB. Free memory was 155.6 MB in the beginning and 135.6 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-04-17 22:55:02,729 INFO L168 Benchmark]: TraceAbstraction took 229974.79 ms. Allocated memory was 200.3 MB in the beginning and 2.9 GB in the end (delta: 2.7 GB). Free memory was 135.0 MB in the beginning and 868.5 MB in the end (delta: -733.6 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2020-04-17 22:55:02,731 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 707.63 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 98.1 MB in the beginning and 159.7 MB in the end (delta: -61.6 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.43 ms. Allocated memory is still 200.3 MB. Free memory was 159.7 MB in the beginning and 157.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.85 ms. Allocated memory is still 200.3 MB. Free memory was 157.0 MB in the beginning and 155.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 534.54 ms. Allocated memory is still 200.3 MB. Free memory was 155.6 MB in the beginning and 135.6 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 229974.79 ms. Allocated memory was 200.3 MB in the beginning and 2.9 GB in the end (delta: 2.7 GB). Free memory was 135.0 MB in the beginning and 868.5 MB in the end (delta: -733.6 MB). Peak memory consumption was 2.0 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: 1.6s, 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: 2.4s, 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: 2.6s, 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: 2.4s, 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 executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 1 error locations. Started 6 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 229.6s, OverallIterations: 105, TraceHistogramMax: 6, AutomataDifference: 81.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 15.8s, HoareTripleCheckerStatistics: 4696 SDtfs, 24936 SDslu, 17023 SDs, 0 SdLazy, 32021 SolverSat, 2219 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2796 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 2101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14324 ImplicationChecksByTransitivity, 21.9s 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: 107.5s AutomataMinimizationTime, 100 MinimizatonAttempts, 2171074 StatesRemovedByMinimization, 92 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 3045 NumberOfCodeBlocks, 3017 NumberOfCodeBlocksAsserted, 178 NumberOfCheckSat, 2810 ConstructedInterpolants, 0 QuantifiedInterpolants, 377768 SizeOfPredicates, 250 NumberOfNonLiveVariables, 5384 ConjunctsInSsa, 391 ConjunctsInUnsatCore, 147 InterpolantComputations, 53 PerfectInterpolantSequences, 900/1652 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