/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-lit/fkp2013_variant-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:26:03,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:26:03,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:26:03,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:26:03,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:26:03,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:26:03,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:26:03,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:26:03,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:26:03,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:26:03,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:26:03,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:26:03,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:26:03,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:26:03,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:26:03,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:26:03,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:26:03,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:26:03,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:26:03,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:26:03,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:26:03,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:26:03,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:26:03,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:26:03,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:26:03,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:26:03,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:26:03,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:26:03,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:26:03,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:26:03,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:26:03,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:26:03,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:26:03,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:26:03,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:26:03,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:26:03,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:26:03,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:26:03,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:26:03,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:26:03,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:26:03,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-04-17 18:26:03,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:26:03,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:26:03,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:26:03,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:26:03,606 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:26:03,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:26:03,607 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:26:03,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:26:03,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:26:03,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:26:03,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:26:03,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:26:03,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:26:03,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:26:03,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:26:03,609 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:26:03,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:26:03,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:26:03,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:26:03,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:26:03,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:26:03,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:26:03,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:26:03,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:26:03,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:26:03,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:26:03,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:26:03,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:26:03,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-04-17 18:26:03,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:26:03,899 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:26:03,910 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:26:03,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:26:03,914 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:26:03,915 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:26:03,915 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/fkp2013_variant-1.i [2020-04-17 18:26:03,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f405ea6a/a425d58cbb1d4ec1b0b6f5f466eb47f6/FLAGb82437493 [2020-04-17 18:26:04,544 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:26:04,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/fkp2013_variant-1.i [2020-04-17 18:26:04,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f405ea6a/a425d58cbb1d4ec1b0b6f5f466eb47f6/FLAGb82437493 [2020-04-17 18:26:04,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f405ea6a/a425d58cbb1d4ec1b0b6f5f466eb47f6 [2020-04-17 18:26:04,819 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:26:04,840 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:26:04,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:26:04,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:26:04,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:26:04,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:26:04" (1/1) ... [2020-04-17 18:26:04,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@423fcc4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:04, skipping insertion in model container [2020-04-17 18:26:04,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:26:04" (1/1) ... [2020-04-17 18:26:04,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:26:04,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:26:05,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:26:05,417 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:26:05,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:26:05,559 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:26:05,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05 WrapperNode [2020-04-17 18:26:05,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:26:05,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:26:05,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:26:05,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:26:05,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (1/1) ... [2020-04-17 18:26:05,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (1/1) ... [2020-04-17 18:26:05,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:26:05,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:26:05,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:26:05,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:26:05,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (1/1) ... [2020-04-17 18:26:05,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (1/1) ... [2020-04-17 18:26:05,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (1/1) ... [2020-04-17 18:26:05,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (1/1) ... [2020-04-17 18:26:05,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (1/1) ... [2020-04-17 18:26:05,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (1/1) ... [2020-04-17 18:26:05,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (1/1) ... [2020-04-17 18:26:05,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:26:05,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:26:05,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:26:05,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:26:05,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (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 18:26:05,692 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-04-17 18:26:05,693 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-04-17 18:26:05,693 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-04-17 18:26:05,694 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-04-17 18:26:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:26:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:26:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:26:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:26:05,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:26:05,701 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 18:26:06,072 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:26:06,072 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-04-17 18:26:06,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:26:06 BoogieIcfgContainer [2020-04-17 18:26:06,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:26:06,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:26:06,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:26:06,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:26:06,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:26:04" (1/3) ... [2020-04-17 18:26:06,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe0d2e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:26:06, skipping insertion in model container [2020-04-17 18:26:06,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:26:05" (2/3) ... [2020-04-17 18:26:06,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe0d2e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:26:06, skipping insertion in model container [2020-04-17 18:26:06,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:26:06" (3/3) ... [2020-04-17 18:26:06,084 INFO L109 eAbstractionObserver]: Analyzing ICFG fkp2013_variant-1.i [2020-04-17 18:26:06,094 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:26:06,095 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:26:06,102 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:26:06,103 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:26:06,125 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,126 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,126 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,127 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,127 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,127 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,128 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,128 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,128 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,129 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,129 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,130 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,130 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,130 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,130 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,131 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,131 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,131 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,132 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,132 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,132 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,135 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,136 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,136 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,136 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,137 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,137 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,147 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,147 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,148 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,148 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,149 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:06,163 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-04-17 18:26:06,179 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:26:06,179 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:26:06,179 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:26:06,180 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:26:06,180 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:26:06,180 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:26:06,180 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:26:06,180 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:26:06,194 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 61 transitions, 132 flow [2020-04-17 18:26:06,196 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 64 places, 61 transitions, 132 flow [2020-04-17 18:26:06,243 INFO L129 PetriNetUnfolder]: 4/71 cut-off events. [2020-04-17 18:26:06,244 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:26:06,252 INFO L80 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 71 events. 4/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2020-04-17 18:26:06,254 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 64 places, 61 transitions, 132 flow [2020-04-17 18:26:06,275 INFO L129 PetriNetUnfolder]: 4/71 cut-off events. [2020-04-17 18:26:06,276 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:26:06,277 INFO L80 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 71 events. 4/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2020-04-17 18:26:06,279 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 692 [2020-04-17 18:26:06,280 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:26:07,636 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-04-17 18:26:07,997 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-04-17 18:26:08,349 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-04-17 18:26:08,443 INFO L206 etLargeBlockEncoding]: Checked pairs total: 529 [2020-04-17 18:26:08,443 INFO L214 etLargeBlockEncoding]: Total number of compositions: 58 [2020-04-17 18:26:08,447 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 12 transitions, 34 flow [2020-04-17 18:26:08,458 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 18:26:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 18:26:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 18:26:08,466 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:08,467 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 18:26:08,468 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 18:26:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:08,474 INFO L82 PathProgramCache]: Analyzing trace with hash 245288, now seen corresponding path program 1 times [2020-04-17 18:26:08,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:08,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592590316] [2020-04-17 18:26:08,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:08,668 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 18:26:08,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592590316] [2020-04-17 18:26:08,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:26:08,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 18:26:08,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500937823] [2020-04-17 18:26:08,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:26:08,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:08,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:26:08,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:26:08,695 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-04-17 18:26:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:08,733 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2020-04-17 18:26:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:26:08,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 18:26:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:08,747 INFO L225 Difference]: With dead ends: 35 [2020-04-17 18:26:08,747 INFO L226 Difference]: Without dead ends: 31 [2020-04-17 18:26:08,749 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 18:26:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-04-17 18:26:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-04-17 18:26:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-04-17 18:26:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 51 transitions. [2020-04-17 18:26:08,787 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 51 transitions. Word has length 3 [2020-04-17 18:26:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:08,788 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 51 transitions. [2020-04-17 18:26:08,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:26:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 51 transitions. [2020-04-17 18:26:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-17 18:26:08,789 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:08,789 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:08,789 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 18:26:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1115005406, now seen corresponding path program 1 times [2020-04-17 18:26:08,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:08,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135929195] [2020-04-17 18:26:08,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:08,887 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 18:26:08,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135929195] [2020-04-17 18:26:08,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:26:08,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:26:08,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579059575] [2020-04-17 18:26:08,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:26:08,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:08,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:26:08,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:26:08,891 INFO L87 Difference]: Start difference. First operand 31 states and 51 transitions. Second operand 4 states. [2020-04-17 18:26:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:08,912 INFO L93 Difference]: Finished difference Result 26 states and 42 transitions. [2020-04-17 18:26:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:26:08,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-04-17 18:26:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:08,913 INFO L225 Difference]: With dead ends: 26 [2020-04-17 18:26:08,913 INFO L226 Difference]: Without dead ends: 24 [2020-04-17 18:26:08,914 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 18:26:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-04-17 18:26:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-04-17 18:26:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-04-17 18:26:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 39 transitions. [2020-04-17 18:26:08,922 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 39 transitions. Word has length 7 [2020-04-17 18:26:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:08,923 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 39 transitions. [2020-04-17 18:26:08,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:26:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 39 transitions. [2020-04-17 18:26:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:26:08,924 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:08,924 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:08,924 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-17 18:26:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash -205446266, now seen corresponding path program 1 times [2020-04-17 18:26:08,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:08,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318804956] [2020-04-17 18:26:08,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:26:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:26:09,041 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:26:09,041 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:26:09,042 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:26:09,043 WARN L363 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:26:09,043 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-04-17 18:26:09,051 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,052 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,052 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,052 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,052 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,052 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,053 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,053 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,053 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,053 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,053 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,053 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,054 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,054 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,054 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,054 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,054 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,055 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,055 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,055 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,055 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,056 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,056 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,056 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,056 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,056 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,057 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,057 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,057 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,057 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,058 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,058 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,058 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,058 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,058 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,059 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,059 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,059 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,059 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,059 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,060 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,060 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,061 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,061 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,061 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,061 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,061 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,062 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,063 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,064 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,064 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,064 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,064 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,064 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,066 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,066 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,066 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,066 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,067 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,068 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,069 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,069 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,069 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,069 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:09,071 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-04-17 18:26:09,072 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:26:09,072 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:26:09,072 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:26:09,072 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:26:09,072 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:26:09,072 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:26:09,073 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:26:09,073 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:26:09,075 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 79 transitions, 182 flow [2020-04-17 18:26:09,075 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 79 transitions, 182 flow [2020-04-17 18:26:09,095 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2020-04-17 18:26:09,095 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-04-17 18:26:09,097 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 135 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2020-04-17 18:26:09,099 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 79 transitions, 182 flow [2020-04-17 18:26:09,116 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2020-04-17 18:26:09,117 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-04-17 18:26:09,118 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 135 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2020-04-17 18:26:09,120 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1108 [2020-04-17 18:26:09,120 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:26:10,748 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1275 [2020-04-17 18:26:10,749 INFO L214 etLargeBlockEncoding]: Total number of compositions: 68 [2020-04-17 18:26:10,749 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 21 transitions, 66 flow [2020-04-17 18:26:10,761 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 224 states. [2020-04-17 18:26:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states. [2020-04-17 18:26:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 18:26:10,763 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:10,763 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 18:26:10,763 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:26:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash 412706, now seen corresponding path program 1 times [2020-04-17 18:26:10,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:10,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072572349] [2020-04-17 18:26:10,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:10,842 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 18:26:10,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072572349] [2020-04-17 18:26:10,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:26:10,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 18:26:10,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424524560] [2020-04-17 18:26:10,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:26:10,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:10,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:26:10,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:26:10,844 INFO L87 Difference]: Start difference. First operand 224 states. Second operand 3 states. [2020-04-17 18:26:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:10,889 INFO L93 Difference]: Finished difference Result 185 states and 459 transitions. [2020-04-17 18:26:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:26:10,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 18:26:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:10,896 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:26:10,896 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 18:26:10,896 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 18:26:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 18:26:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-04-17 18:26:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-04-17 18:26:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 418 transitions. [2020-04-17 18:26:10,944 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 418 transitions. Word has length 3 [2020-04-17 18:26:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:10,945 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 418 transitions. [2020-04-17 18:26:10,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:26:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 418 transitions. [2020-04-17 18:26:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:26:10,948 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:10,948 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:10,949 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:26:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1644016500, now seen corresponding path program 1 times [2020-04-17 18:26:10,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:10,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236836975] [2020-04-17 18:26:10,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:11,016 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 18:26:11,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236836975] [2020-04-17 18:26:11,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:26:11,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:26:11,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311671434] [2020-04-17 18:26:11,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:26:11,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:11,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:26:11,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:26:11,019 INFO L87 Difference]: Start difference. First operand 171 states and 418 transitions. Second operand 5 states. [2020-04-17 18:26:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:11,127 INFO L93 Difference]: Finished difference Result 225 states and 491 transitions. [2020-04-17 18:26:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:26:11,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 18:26:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:11,131 INFO L225 Difference]: With dead ends: 225 [2020-04-17 18:26:11,131 INFO L226 Difference]: Without dead ends: 221 [2020-04-17 18:26:11,131 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 18:26:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-04-17 18:26:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-04-17 18:26:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 18:26:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-04-17 18:26:11,164 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 9 [2020-04-17 18:26:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:11,165 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-04-17 18:26:11,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:26:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-04-17 18:26:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:26:11,166 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:11,167 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:11,167 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:26:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:11,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2007179405, now seen corresponding path program 1 times [2020-04-17 18:26:11,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:11,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041483076] [2020-04-17 18:26:11,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:11,279 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 18:26:11,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041483076] [2020-04-17 18:26:11,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850991462] [2020-04-17 18:26:11,280 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 18:26:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:11,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:26:11,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:11,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:11,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 18:26:11,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102034224] [2020-04-17 18:26:11,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:26:11,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:11,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:26:11,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:26:11,462 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 14 states. [2020-04-17 18:26:11,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:11,663 INFO L93 Difference]: Finished difference Result 189 states and 423 transitions. [2020-04-17 18:26:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:26:11,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-04-17 18:26:11,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:11,666 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:26:11,666 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 18:26:11,667 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:26:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 18:26:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 153. [2020-04-17 18:26:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-04-17 18:26:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 367 transitions. [2020-04-17 18:26:11,678 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 367 transitions. Word has length 13 [2020-04-17 18:26:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:11,680 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 367 transitions. [2020-04-17 18:26:11,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:26:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 367 transitions. [2020-04-17 18:26:11,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:26:11,681 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:11,682 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:11,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:11,888 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:26:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:11,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2089198851, now seen corresponding path program 1 times [2020-04-17 18:26:11,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:11,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890431004] [2020-04-17 18:26:11,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:26:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:26:11,943 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:26:11,944 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:26:11,944 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:26:11,945 WARN L363 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:26:11,946 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-04-17 18:26:11,957 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,958 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,958 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,958 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,958 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,958 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,958 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,959 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,959 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,959 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,959 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,959 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,959 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,960 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,960 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,960 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,960 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,960 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,960 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,961 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,961 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,961 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,961 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,961 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,961 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,962 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,962 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,962 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,962 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,963 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,963 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,963 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,963 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,963 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,963 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,964 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,964 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,964 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,964 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,964 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,965 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,965 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,965 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,965 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,965 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,965 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,966 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,966 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,966 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,966 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,966 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,967 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,967 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,967 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,967 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,967 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,967 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,967 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,968 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,968 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,968 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,968 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,968 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,969 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,969 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,969 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,969 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,969 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,970 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,971 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,972 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,972 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,972 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,972 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,972 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,974 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,975 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,975 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,975 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,975 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,975 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,977 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,977 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,977 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,978 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,978 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,979 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,979 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,980 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,980 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,980 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,981 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,981 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,982 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,982 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,982 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:11,983 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-04-17 18:26:11,984 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:26:11,984 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:26:11,984 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:26:11,984 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:26:11,984 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:26:11,984 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:26:11,984 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:26:11,984 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:26:11,986 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 97 transitions, 236 flow [2020-04-17 18:26:11,986 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 106 places, 97 transitions, 236 flow [2020-04-17 18:26:12,005 INFO L129 PetriNetUnfolder]: 6/115 cut-off events. [2020-04-17 18:26:12,005 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-04-17 18:26:12,006 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 115 events. 6/115 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2020-04-17 18:26:12,009 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 106 places, 97 transitions, 236 flow [2020-04-17 18:26:12,024 INFO L129 PetriNetUnfolder]: 6/115 cut-off events. [2020-04-17 18:26:12,024 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-04-17 18:26:12,025 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 115 events. 6/115 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2020-04-17 18:26:12,028 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1608 [2020-04-17 18:26:12,028 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:26:13,576 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-04-17 18:26:14,017 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-04-17 18:26:14,127 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1856 [2020-04-17 18:26:14,127 INFO L214 etLargeBlockEncoding]: Total number of compositions: 89 [2020-04-17 18:26:14,128 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 27 transitions, 96 flow [2020-04-17 18:26:14,160 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 683 states. [2020-04-17 18:26:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states. [2020-04-17 18:26:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 18:26:14,161 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:14,161 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 18:26:14,162 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 18:26:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash 619488, now seen corresponding path program 1 times [2020-04-17 18:26:14,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:14,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078977432] [2020-04-17 18:26:14,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:14,189 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 18:26:14,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078977432] [2020-04-17 18:26:14,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:26:14,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 18:26:14,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087143183] [2020-04-17 18:26:14,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:26:14,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:14,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:26:14,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:26:14,191 INFO L87 Difference]: Start difference. First operand 683 states. Second operand 3 states. [2020-04-17 18:26:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:14,230 INFO L93 Difference]: Finished difference Result 600 states and 1886 transitions. [2020-04-17 18:26:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:26:14,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 18:26:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:14,237 INFO L225 Difference]: With dead ends: 600 [2020-04-17 18:26:14,237 INFO L226 Difference]: Without dead ends: 559 [2020-04-17 18:26:14,238 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 18:26:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-04-17 18:26:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2020-04-17 18:26:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-04-17 18:26:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1737 transitions. [2020-04-17 18:26:14,279 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1737 transitions. Word has length 3 [2020-04-17 18:26:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:14,280 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 1737 transitions. [2020-04-17 18:26:14,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:26:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1737 transitions. [2020-04-17 18:26:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:26:14,281 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:14,281 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:14,281 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 18:26:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:14,282 INFO L82 PathProgramCache]: Analyzing trace with hash -760522402, now seen corresponding path program 1 times [2020-04-17 18:26:14,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:14,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779216283] [2020-04-17 18:26:14,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:14,327 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 18:26:14,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779216283] [2020-04-17 18:26:14,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:26:14,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:26:14,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214621254] [2020-04-17 18:26:14,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:26:14,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:14,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:26:14,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:26:14,330 INFO L87 Difference]: Start difference. First operand 559 states and 1737 transitions. Second operand 5 states. [2020-04-17 18:26:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:14,415 INFO L93 Difference]: Finished difference Result 933 states and 2580 transitions. [2020-04-17 18:26:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:26:14,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 18:26:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:14,422 INFO L225 Difference]: With dead ends: 933 [2020-04-17 18:26:14,423 INFO L226 Difference]: Without dead ends: 928 [2020-04-17 18:26:14,423 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 18:26:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2020-04-17 18:26:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 585. [2020-04-17 18:26:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-04-17 18:26:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1832 transitions. [2020-04-17 18:26:14,453 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1832 transitions. Word has length 9 [2020-04-17 18:26:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:14,453 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 1832 transitions. [2020-04-17 18:26:14,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:26:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1832 transitions. [2020-04-17 18:26:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:26:14,455 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:14,455 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:14,455 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 18:26:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:14,456 INFO L82 PathProgramCache]: Analyzing trace with hash -146499013, now seen corresponding path program 1 times [2020-04-17 18:26:14,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:14,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590713102] [2020-04-17 18:26:14,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:14,527 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 18:26:14,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590713102] [2020-04-17 18:26:14,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633224629] [2020-04-17 18:26:14,529 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 18:26:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:14,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:26:14,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:14,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:14,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 18:26:14,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700858548] [2020-04-17 18:26:14,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:26:14,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:14,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:26:14,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:26:14,687 INFO L87 Difference]: Start difference. First operand 585 states and 1832 transitions. Second operand 14 states. [2020-04-17 18:26:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:14,982 INFO L93 Difference]: Finished difference Result 843 states and 2406 transitions. [2020-04-17 18:26:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:26:14,982 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-04-17 18:26:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:14,988 INFO L225 Difference]: With dead ends: 843 [2020-04-17 18:26:14,988 INFO L226 Difference]: Without dead ends: 836 [2020-04-17 18:26:14,989 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:26:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2020-04-17 18:26:15,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 611. [2020-04-17 18:26:15,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-04-17 18:26:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1906 transitions. [2020-04-17 18:26:15,018 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1906 transitions. Word has length 13 [2020-04-17 18:26:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:15,018 INFO L479 AbstractCegarLoop]: Abstraction has 611 states and 1906 transitions. [2020-04-17 18:26:15,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:26:15,019 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1906 transitions. [2020-04-17 18:26:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:26:15,024 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:15,024 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:15,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:15,228 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 18:26:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:15,229 INFO L82 PathProgramCache]: Analyzing trace with hash 141115969, now seen corresponding path program 1 times [2020-04-17 18:26:15,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:15,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792629867] [2020-04-17 18:26:15,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:15,367 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 18:26:15,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792629867] [2020-04-17 18:26:15,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344613475] [2020-04-17 18:26:15,368 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 18:26:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:15,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:26:15,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:15,544 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 18:26:15,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:15,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:26:15,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473399138] [2020-04-17 18:26:15,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:26:15,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:15,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:26:15,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:26:15,547 INFO L87 Difference]: Start difference. First operand 611 states and 1906 transitions. Second operand 18 states. [2020-04-17 18:26:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:17,074 INFO L93 Difference]: Finished difference Result 3011 states and 7783 transitions. [2020-04-17 18:26:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-04-17 18:26:17,075 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-04-17 18:26:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:17,095 INFO L225 Difference]: With dead ends: 3011 [2020-04-17 18:26:17,095 INFO L226 Difference]: Without dead ends: 3001 [2020-04-17 18:26:17,097 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=722, Invalid=2700, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 18:26:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2020-04-17 18:26:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 661. [2020-04-17 18:26:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2020-04-17 18:26:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 2106 transitions. [2020-04-17 18:26:17,151 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 2106 transitions. Word has length 15 [2020-04-17 18:26:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:17,151 INFO L479 AbstractCegarLoop]: Abstraction has 661 states and 2106 transitions. [2020-04-17 18:26:17,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:26:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 2106 transitions. [2020-04-17 18:26:17,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:26:17,153 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:17,154 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:17,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:17,358 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 18:26:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:17,358 INFO L82 PathProgramCache]: Analyzing trace with hash 684503809, now seen corresponding path program 2 times [2020-04-17 18:26:17,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:17,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76473839] [2020-04-17 18:26:17,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:17,439 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 18:26:17,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76473839] [2020-04-17 18:26:17,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021009481] [2020-04-17 18:26:17,440 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 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 18:26:17,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:26:17,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:17,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:26:17,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:17,654 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 18:26:17,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:17,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:26:17,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657580645] [2020-04-17 18:26:17,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:26:17,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:17,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:26:17,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:26:17,657 INFO L87 Difference]: Start difference. First operand 661 states and 2106 transitions. Second operand 18 states. [2020-04-17 18:26:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:18,663 INFO L93 Difference]: Finished difference Result 1537 states and 3953 transitions. [2020-04-17 18:26:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:26:18,664 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-04-17 18:26:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:18,674 INFO L225 Difference]: With dead ends: 1537 [2020-04-17 18:26:18,674 INFO L226 Difference]: Without dead ends: 1530 [2020-04-17 18:26:18,675 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=369, Invalid=1353, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 18:26:18,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2020-04-17 18:26:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 656. [2020-04-17 18:26:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-04-17 18:26:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2086 transitions. [2020-04-17 18:26:18,705 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2086 transitions. Word has length 15 [2020-04-17 18:26:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:18,706 INFO L479 AbstractCegarLoop]: Abstraction has 656 states and 2086 transitions. [2020-04-17 18:26:18,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:26:18,706 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2086 transitions. [2020-04-17 18:26:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:26:18,706 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:18,707 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:18,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:18,910 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 18:26:18,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:18,911 INFO L82 PathProgramCache]: Analyzing trace with hash -174965367, now seen corresponding path program 3 times [2020-04-17 18:26:18,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:18,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934532824] [2020-04-17 18:26:18,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:19,017 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 18:26:19,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934532824] [2020-04-17 18:26:19,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165366342] [2020-04-17 18:26:19,018 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 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 18:26:19,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:26:19,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:19,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:26:19,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:19,182 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 18:26:19,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:19,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:26:19,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756415027] [2020-04-17 18:26:19,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:26:19,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:19,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:26:19,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:26:19,188 INFO L87 Difference]: Start difference. First operand 656 states and 2086 transitions. Second operand 18 states. [2020-04-17 18:26:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:20,198 INFO L93 Difference]: Finished difference Result 1382 states and 3503 transitions. [2020-04-17 18:26:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:26:20,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-04-17 18:26:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:20,207 INFO L225 Difference]: With dead ends: 1382 [2020-04-17 18:26:20,208 INFO L226 Difference]: Without dead ends: 1376 [2020-04-17 18:26:20,209 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=376, Invalid=1430, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:26:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2020-04-17 18:26:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 620. [2020-04-17 18:26:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-04-17 18:26:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1966 transitions. [2020-04-17 18:26:20,236 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1966 transitions. Word has length 15 [2020-04-17 18:26:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:20,236 INFO L479 AbstractCegarLoop]: Abstraction has 620 states and 1966 transitions. [2020-04-17 18:26:20,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:26:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1966 transitions. [2020-04-17 18:26:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:26:20,238 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:20,238 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:20,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:20,442 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 18:26:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash 948378311, now seen corresponding path program 4 times [2020-04-17 18:26:20,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:20,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084168706] [2020-04-17 18:26:20,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:20,547 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 18:26:20,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084168706] [2020-04-17 18:26:20,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572411000] [2020-04-17 18:26:20,548 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 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 18:26:20,608 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:26:20,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:20,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:26:20,610 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:20,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:20,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:26:20,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93451173] [2020-04-17 18:26:20,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:26:20,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:20,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:26:20,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:26:20,700 INFO L87 Difference]: Start difference. First operand 620 states and 1966 transitions. Second operand 18 states. [2020-04-17 18:26:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:21,522 INFO L93 Difference]: Finished difference Result 1833 states and 4760 transitions. [2020-04-17 18:26:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:26:21,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-04-17 18:26:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:21,534 INFO L225 Difference]: With dead ends: 1833 [2020-04-17 18:26:21,534 INFO L226 Difference]: Without dead ends: 1825 [2020-04-17 18:26:21,535 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:26:21,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2020-04-17 18:26:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 565. [2020-04-17 18:26:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-04-17 18:26:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1814 transitions. [2020-04-17 18:26:21,566 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1814 transitions. Word has length 15 [2020-04-17 18:26:21,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:21,566 INFO L479 AbstractCegarLoop]: Abstraction has 565 states and 1814 transitions. [2020-04-17 18:26:21,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:26:21,566 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1814 transitions. [2020-04-17 18:26:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:26:21,567 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:21,567 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:21,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:21,771 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:26:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash 244770691, now seen corresponding path program 1 times [2020-04-17 18:26:21,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:21,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236601397] [2020-04-17 18:26:21,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:21,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236601397] [2020-04-17 18:26:21,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118549886] [2020-04-17 18:26:21,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:21,952 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:26:21,953 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:22,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:22,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:26:22,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799124905] [2020-04-17 18:26:22,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:26:22,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:22,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:26:22,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:26:22,053 INFO L87 Difference]: Start difference. First operand 565 states and 1814 transitions. Second operand 16 states. [2020-04-17 18:26:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:22,323 INFO L93 Difference]: Finished difference Result 765 states and 2242 transitions. [2020-04-17 18:26:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:26:22,324 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2020-04-17 18:26:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:22,333 INFO L225 Difference]: With dead ends: 765 [2020-04-17 18:26:22,333 INFO L226 Difference]: Without dead ends: 757 [2020-04-17 18:26:22,334 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:26:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-04-17 18:26:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 575. [2020-04-17 18:26:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-04-17 18:26:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1796 transitions. [2020-04-17 18:26:22,353 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1796 transitions. Word has length 17 [2020-04-17 18:26:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:22,354 INFO L479 AbstractCegarLoop]: Abstraction has 575 states and 1796 transitions. [2020-04-17 18:26:22,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:26:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1796 transitions. [2020-04-17 18:26:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:26:22,355 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:22,355 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:22,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:22,560 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:26:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:22,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1006694159, now seen corresponding path program 1 times [2020-04-17 18:26:22,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:22,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15975958] [2020-04-17 18:26:22,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:26:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:26:22,584 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:26:22,584 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:26:22,585 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:26:22,585 WARN L363 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:26:22,585 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-04-17 18:26:22,598 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,598 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,598 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,599 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,599 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,599 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,599 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,599 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,599 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,599 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,600 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,600 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,600 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,600 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,600 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,600 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,600 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,601 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,601 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,601 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,601 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,601 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,601 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,601 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,602 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,602 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,602 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,602 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,602 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,602 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,602 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,602 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,603 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,603 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,603 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,603 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,603 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,603 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,604 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,604 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,604 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,604 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,604 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,604 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,604 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,605 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,605 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,605 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,605 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,605 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,605 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,606 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,606 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,606 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,606 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,606 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,606 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,606 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,607 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,607 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,607 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,607 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,607 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,607 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,608 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,608 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,608 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,608 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,608 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,608 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,608 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,609 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,609 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,609 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,609 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,609 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,609 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,609 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,610 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,610 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,610 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,610 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,610 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,610 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,611 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,611 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,611 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,611 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,611 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,611 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,613 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,613 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,613 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,613 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,613 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,614 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,615 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,615 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,615 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,615 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,615 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,615 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,616 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,617 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,617 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,617 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,617 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,617 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,618 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,618 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,618 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,618 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,618 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,619 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,619 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,619 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,619 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,619 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,620 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,621 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,621 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,621 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,621 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,622 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,622 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,622 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,622 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,623 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:26:22,624 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-04-17 18:26:22,624 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:26:22,624 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:26:22,625 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:26:22,625 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:26:22,625 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:26:22,625 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:26:22,625 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:26:22,625 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:26:22,628 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 115 transitions, 294 flow [2020-04-17 18:26:22,628 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 127 places, 115 transitions, 294 flow [2020-04-17 18:26:22,650 INFO L129 PetriNetUnfolder]: 7/137 cut-off events. [2020-04-17 18:26:22,650 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-04-17 18:26:22,652 INFO L80 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 137 events. 7/137 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 157. Up to 10 conditions per place. [2020-04-17 18:26:22,656 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 127 places, 115 transitions, 294 flow [2020-04-17 18:26:22,677 INFO L129 PetriNetUnfolder]: 7/137 cut-off events. [2020-04-17 18:26:22,677 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-04-17 18:26:22,678 INFO L80 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 137 events. 7/137 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 157. Up to 10 conditions per place. [2020-04-17 18:26:22,681 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2192 [2020-04-17 18:26:22,681 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:26:24,465 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-04-17 18:26:24,686 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-04-17 18:26:24,760 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2531 [2020-04-17 18:26:24,761 INFO L214 etLargeBlockEncoding]: Total number of compositions: 101 [2020-04-17 18:26:24,761 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 33 transitions, 130 flow [2020-04-17 18:26:24,880 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2060 states. [2020-04-17 18:26:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states. [2020-04-17 18:26:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 18:26:24,881 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:24,881 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 18:26:24,881 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 18:26:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:24,881 INFO L82 PathProgramCache]: Analyzing trace with hash 857348, now seen corresponding path program 1 times [2020-04-17 18:26:24,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:24,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270119242] [2020-04-17 18:26:24,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:24,899 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 18:26:24,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270119242] [2020-04-17 18:26:24,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:26:24,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 18:26:24,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472628461] [2020-04-17 18:26:24,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:26:24,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:24,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:26:24,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:26:24,901 INFO L87 Difference]: Start difference. First operand 2060 states. Second operand 3 states. [2020-04-17 18:26:24,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:24,940 INFO L93 Difference]: Finished difference Result 1889 states and 7217 transitions. [2020-04-17 18:26:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:26:24,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 18:26:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:24,954 INFO L225 Difference]: With dead ends: 1889 [2020-04-17 18:26:24,954 INFO L226 Difference]: Without dead ends: 1767 [2020-04-17 18:26:24,955 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 18:26:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2020-04-17 18:26:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1767. [2020-04-17 18:26:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1767 states. [2020-04-17 18:26:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 6690 transitions. [2020-04-17 18:26:25,018 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 6690 transitions. Word has length 3 [2020-04-17 18:26:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:25,019 INFO L479 AbstractCegarLoop]: Abstraction has 1767 states and 6690 transitions. [2020-04-17 18:26:25,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:26:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 6690 transitions. [2020-04-17 18:26:25,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:26:25,019 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:25,019 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:25,020 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 18:26:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:25,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1063852733, now seen corresponding path program 1 times [2020-04-17 18:26:25,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:25,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103680683] [2020-04-17 18:26:25,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:25,053 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 18:26:25,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103680683] [2020-04-17 18:26:25,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:26:25,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:26:25,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480279151] [2020-04-17 18:26:25,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:26:25,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:25,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:26:25,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:26:25,056 INFO L87 Difference]: Start difference. First operand 1767 states and 6690 transitions. Second operand 5 states. [2020-04-17 18:26:25,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:25,145 INFO L93 Difference]: Finished difference Result 3381 states and 11559 transitions. [2020-04-17 18:26:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:26:25,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 18:26:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:25,185 INFO L225 Difference]: With dead ends: 3381 [2020-04-17 18:26:25,185 INFO L226 Difference]: Without dead ends: 3375 [2020-04-17 18:26:25,185 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 18:26:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-04-17 18:26:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 1966. [2020-04-17 18:26:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1966 states. [2020-04-17 18:26:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7503 transitions. [2020-04-17 18:26:25,270 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7503 transitions. Word has length 9 [2020-04-17 18:26:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:25,270 INFO L479 AbstractCegarLoop]: Abstraction has 1966 states and 7503 transitions. [2020-04-17 18:26:25,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:26:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7503 transitions. [2020-04-17 18:26:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:26:25,271 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:25,271 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:25,271 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 18:26:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:25,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2048649897, now seen corresponding path program 1 times [2020-04-17 18:26:25,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:25,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136857154] [2020-04-17 18:26:25,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:25,329 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 18:26:25,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136857154] [2020-04-17 18:26:25,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836354586] [2020-04-17 18:26:25,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:26:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:25,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:26:25,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:25,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:25,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:26:25,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625747026] [2020-04-17 18:26:25,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:26:25,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:25,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:26:25,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:26:25,517 INFO L87 Difference]: Start difference. First operand 1966 states and 7503 transitions. Second operand 13 states. [2020-04-17 18:26:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:25,794 INFO L93 Difference]: Finished difference Result 3274 states and 11428 transitions. [2020-04-17 18:26:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:26:25,794 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2020-04-17 18:26:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:25,804 INFO L225 Difference]: With dead ends: 3274 [2020-04-17 18:26:25,804 INFO L226 Difference]: Without dead ends: 3258 [2020-04-17 18:26:25,805 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:26:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2020-04-17 18:26:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 2200. [2020-04-17 18:26:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2200 states. [2020-04-17 18:26:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 8453 transitions. [2020-04-17 18:26:25,901 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 8453 transitions. Word has length 13 [2020-04-17 18:26:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:25,902 INFO L479 AbstractCegarLoop]: Abstraction has 2200 states and 8453 transitions. [2020-04-17 18:26:25,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:26:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 8453 transitions. [2020-04-17 18:26:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:26:25,902 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:25,903 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:26,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:26,109 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 18:26:26,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:26,110 INFO L82 PathProgramCache]: Analyzing trace with hash 119106913, now seen corresponding path program 1 times [2020-04-17 18:26:26,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:26,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140575121] [2020-04-17 18:26:26,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:26,183 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 18:26:26,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140575121] [2020-04-17 18:26:26,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933673064] [2020-04-17 18:26:26,184 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 18:26:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:26,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:26:26,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:26,345 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 18:26:26,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:26,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:26:26,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756998032] [2020-04-17 18:26:26,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:26:26,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:26,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:26:26,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:26:26,347 INFO L87 Difference]: Start difference. First operand 2200 states and 8453 transitions. Second operand 17 states. [2020-04-17 18:26:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:27,368 INFO L93 Difference]: Finished difference Result 6077 states and 18777 transitions. [2020-04-17 18:26:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:26:27,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2020-04-17 18:26:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:27,387 INFO L225 Difference]: With dead ends: 6077 [2020-04-17 18:26:27,388 INFO L226 Difference]: Without dead ends: 6068 [2020-04-17 18:26:27,389 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=1434, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:26:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6068 states. [2020-04-17 18:26:27,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6068 to 2184. [2020-04-17 18:26:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-04-17 18:26:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 8378 transitions. [2020-04-17 18:26:27,500 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 8378 transitions. Word has length 15 [2020-04-17 18:26:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:27,501 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 8378 transitions. [2020-04-17 18:26:27,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:26:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 8378 transitions. [2020-04-17 18:26:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:26:27,502 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:27,502 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:27,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:27,705 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 18:26:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:27,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1657522145, now seen corresponding path program 2 times [2020-04-17 18:26:27,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:27,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773965191] [2020-04-17 18:26:27,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:27,791 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 18:26:27,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773965191] [2020-04-17 18:26:27,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383485793] [2020-04-17 18:26:27,791 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 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 18:26:27,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:26:27,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:27,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:26:27,858 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:27,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:27,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:26:27,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140585668] [2020-04-17 18:26:27,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:26:27,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:26:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:26:27,998 INFO L87 Difference]: Start difference. First operand 2184 states and 8378 transitions. Second operand 17 states. [2020-04-17 18:26:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:28,983 INFO L93 Difference]: Finished difference Result 8096 states and 25581 transitions. [2020-04-17 18:26:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 18:26:28,984 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2020-04-17 18:26:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:29,009 INFO L225 Difference]: With dead ends: 8096 [2020-04-17 18:26:29,009 INFO L226 Difference]: Without dead ends: 8079 [2020-04-17 18:26:29,010 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=1396, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:26:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2020-04-17 18:26:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 2062. [2020-04-17 18:26:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2020-04-17 18:26:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 7945 transitions. [2020-04-17 18:26:29,222 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 7945 transitions. Word has length 15 [2020-04-17 18:26:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:29,223 INFO L479 AbstractCegarLoop]: Abstraction has 2062 states and 7945 transitions. [2020-04-17 18:26:29,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:26:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 7945 transitions. [2020-04-17 18:26:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:26:29,224 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:29,224 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:29,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:29,429 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 18:26:29,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:29,430 INFO L82 PathProgramCache]: Analyzing trace with hash -308621917, now seen corresponding path program 1 times [2020-04-17 18:26:29,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:29,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207159858] [2020-04-17 18:26:29,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:29,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207159858] [2020-04-17 18:26:29,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551697346] [2020-04-17 18:26:29,497 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 18:26:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:29,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:26:29,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:29,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:29,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:26:29,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9434203] [2020-04-17 18:26:29,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:26:29,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:29,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:26:29,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:26:29,688 INFO L87 Difference]: Start difference. First operand 2062 states and 7945 transitions. Second operand 15 states. [2020-04-17 18:26:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:30,062 INFO L93 Difference]: Finished difference Result 3572 states and 12837 transitions. [2020-04-17 18:26:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:26:30,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-04-17 18:26:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:30,073 INFO L225 Difference]: With dead ends: 3572 [2020-04-17 18:26:30,073 INFO L226 Difference]: Without dead ends: 3549 [2020-04-17 18:26:30,074 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:26:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2020-04-17 18:26:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 2298. [2020-04-17 18:26:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2298 states. [2020-04-17 18:26:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 8830 transitions. [2020-04-17 18:26:30,165 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 8830 transitions. Word has length 17 [2020-04-17 18:26:30,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:30,166 INFO L479 AbstractCegarLoop]: Abstraction has 2298 states and 8830 transitions. [2020-04-17 18:26:30,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:26:30,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 8830 transitions. [2020-04-17 18:26:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:26:30,169 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:30,169 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:30,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:30,373 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 18:26:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:30,374 INFO L82 PathProgramCache]: Analyzing trace with hash -433572773, now seen corresponding path program 1 times [2020-04-17 18:26:30,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:30,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661238892] [2020-04-17 18:26:30,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:30,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661238892] [2020-04-17 18:26:30,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655476280] [2020-04-17 18:26:30,474 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 18:26:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:30,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:26:30,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:30,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:30,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-04-17 18:26:30,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267876976] [2020-04-17 18:26:30,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:26:30,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:30,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:26:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:26:30,701 INFO L87 Difference]: Start difference. First operand 2298 states and 8830 transitions. Second operand 19 states. [2020-04-17 18:26:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:32,254 INFO L93 Difference]: Finished difference Result 5884 states and 19185 transitions. [2020-04-17 18:26:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 18:26:32,255 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-04-17 18:26:32,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:32,271 INFO L225 Difference]: With dead ends: 5884 [2020-04-17 18:26:32,271 INFO L226 Difference]: Without dead ends: 5873 [2020-04-17 18:26:32,273 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=520, Invalid=2030, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 18:26:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5873 states. [2020-04-17 18:26:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5873 to 2302. [2020-04-17 18:26:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2302 states. [2020-04-17 18:26:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 8807 transitions. [2020-04-17 18:26:32,385 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 8807 transitions. Word has length 19 [2020-04-17 18:26:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:32,386 INFO L479 AbstractCegarLoop]: Abstraction has 2302 states and 8807 transitions. [2020-04-17 18:26:32,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:26:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 8807 transitions. [2020-04-17 18:26:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:26:32,387 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:32,387 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:32,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:32,600 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 18:26:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:32,601 INFO L82 PathProgramCache]: Analyzing trace with hash -565762555, now seen corresponding path program 1 times [2020-04-17 18:26:32,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:32,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579333476] [2020-04-17 18:26:32,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:26:32,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579333476] [2020-04-17 18:26:32,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701647030] [2020-04-17 18:26:32,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:26:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:32,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:26:32,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:32,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:32,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2020-04-17 18:26:32,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000010154] [2020-04-17 18:26:32,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:26:32,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:32,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:26:32,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:26:32,877 INFO L87 Difference]: Start difference. First operand 2302 states and 8807 transitions. Second operand 18 states. [2020-04-17 18:26:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:33,947 INFO L93 Difference]: Finished difference Result 6989 states and 23390 transitions. [2020-04-17 18:26:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:26:33,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-04-17 18:26:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:33,961 INFO L225 Difference]: With dead ends: 6989 [2020-04-17 18:26:33,961 INFO L226 Difference]: Without dead ends: 6975 [2020-04-17 18:26:33,962 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=1263, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:26:33,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6975 states. [2020-04-17 18:26:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6975 to 2434. [2020-04-17 18:26:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2434 states. [2020-04-17 18:26:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 9410 transitions. [2020-04-17 18:26:34,049 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 9410 transitions. Word has length 19 [2020-04-17 18:26:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:34,050 INFO L479 AbstractCegarLoop]: Abstraction has 2434 states and 9410 transitions. [2020-04-17 18:26:34,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:26:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 9410 transitions. [2020-04-17 18:26:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:26:34,051 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:34,051 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:34,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:34,255 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 18:26:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash -232926117, now seen corresponding path program 2 times [2020-04-17 18:26:34,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:34,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850915390] [2020-04-17 18:26:34,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:34,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850915390] [2020-04-17 18:26:34,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303688330] [2020-04-17 18:26:34,353 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 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 18:26:34,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:26:34,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:34,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:26:34,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:26:34,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:34,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-04-17 18:26:34,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417733807] [2020-04-17 18:26:34,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:26:34,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:34,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:26:34,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:26:34,577 INFO L87 Difference]: Start difference. First operand 2434 states and 9410 transitions. Second operand 18 states. [2020-04-17 18:26:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:35,600 INFO L93 Difference]: Finished difference Result 6484 states and 22130 transitions. [2020-04-17 18:26:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:26:35,601 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-04-17 18:26:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:35,611 INFO L225 Difference]: With dead ends: 6484 [2020-04-17 18:26:35,611 INFO L226 Difference]: Without dead ends: 6455 [2020-04-17 18:26:35,612 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=1201, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:26:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6455 states. [2020-04-17 18:26:35,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6455 to 2330. [2020-04-17 18:26:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2330 states. [2020-04-17 18:26:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 9020 transitions. [2020-04-17 18:26:35,748 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 9020 transitions. Word has length 19 [2020-04-17 18:26:35,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:35,748 INFO L479 AbstractCegarLoop]: Abstraction has 2330 states and 9020 transitions. [2020-04-17 18:26:35,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:26:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 9020 transitions. [2020-04-17 18:26:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:26:35,750 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:35,750 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:35,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:35,952 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 18:26:35,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:35,952 INFO L82 PathProgramCache]: Analyzing trace with hash -232915515, now seen corresponding path program 2 times [2020-04-17 18:26:35,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:35,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325854828] [2020-04-17 18:26:35,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:36,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325854828] [2020-04-17 18:26:36,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520828063] [2020-04-17 18:26:36,029 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 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 18:26:36,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:26:36,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:36,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:26:36,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:26:36,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:36,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-04-17 18:26:36,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722942687] [2020-04-17 18:26:36,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:26:36,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:26:36,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:26:36,212 INFO L87 Difference]: Start difference. First operand 2330 states and 9020 transitions. Second operand 18 states. [2020-04-17 18:26:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:37,193 INFO L93 Difference]: Finished difference Result 5149 states and 17065 transitions. [2020-04-17 18:26:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:26:37,193 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-04-17 18:26:37,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:37,203 INFO L225 Difference]: With dead ends: 5149 [2020-04-17 18:26:37,204 INFO L226 Difference]: Without dead ends: 5126 [2020-04-17 18:26:37,204 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=1201, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:26:37,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2020-04-17 18:26:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 2353. [2020-04-17 18:26:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2353 states. [2020-04-17 18:26:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 9106 transitions. [2020-04-17 18:26:37,294 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 9106 transitions. Word has length 19 [2020-04-17 18:26:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:37,294 INFO L479 AbstractCegarLoop]: Abstraction has 2353 states and 9106 transitions. [2020-04-17 18:26:37,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:26:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 9106 transitions. [2020-04-17 18:26:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:26:37,296 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:37,297 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:37,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:37,502 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 18:26:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:37,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1402635183, now seen corresponding path program 3 times [2020-04-17 18:26:37,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:37,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693754773] [2020-04-17 18:26:37,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:26:37,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693754773] [2020-04-17 18:26:37,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661160662] [2020-04-17 18:26:37,571 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 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 18:26:37,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:26:37,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:37,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:26:37,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:37,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:37,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2020-04-17 18:26:37,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166051156] [2020-04-17 18:26:37,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:26:37,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:37,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:26:37,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:26:37,752 INFO L87 Difference]: Start difference. First operand 2353 states and 9106 transitions. Second operand 18 states. [2020-04-17 18:26:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:38,835 INFO L93 Difference]: Finished difference Result 5811 states and 19225 transitions. [2020-04-17 18:26:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:26:38,836 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-04-17 18:26:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:38,845 INFO L225 Difference]: With dead ends: 5811 [2020-04-17 18:26:38,846 INFO L226 Difference]: Without dead ends: 5798 [2020-04-17 18:26:38,846 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:26:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-04-17 18:26:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 2296. [2020-04-17 18:26:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2296 states. [2020-04-17 18:26:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8805 transitions. [2020-04-17 18:26:38,936 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8805 transitions. Word has length 19 [2020-04-17 18:26:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:38,937 INFO L479 AbstractCegarLoop]: Abstraction has 2296 states and 8805 transitions. [2020-04-17 18:26:38,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:26:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8805 transitions. [2020-04-17 18:26:38,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:26:38,944 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:38,944 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:26:39,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:39,156 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 18:26:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:39,157 INFO L82 PathProgramCache]: Analyzing trace with hash 316303169, now seen corresponding path program 4 times [2020-04-17 18:26:39,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:39,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979300754] [2020-04-17 18:26:39,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:26:39,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979300754] [2020-04-17 18:26:39,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200091966] [2020-04-17 18:26:39,218 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 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 18:26:39,285 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:26:39,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:39,287 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:26:39,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:39,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:39,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2020-04-17 18:26:39,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798660816] [2020-04-17 18:26:39,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:26:39,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:26:39,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:26:39,396 INFO L87 Difference]: Start difference. First operand 2296 states and 8805 transitions. Second operand 18 states. [2020-04-17 18:26:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:40,959 INFO L93 Difference]: Finished difference Result 6630 states and 21242 transitions. [2020-04-17 18:26:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 18:26:40,960 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-04-17 18:26:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:40,975 INFO L225 Difference]: With dead ends: 6630 [2020-04-17 18:26:40,975 INFO L226 Difference]: Without dead ends: 6616 [2020-04-17 18:26:40,977 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=583, Invalid=2173, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 18:26:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2020-04-17 18:26:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 2137. [2020-04-17 18:26:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2137 states. [2020-04-17 18:26:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8171 transitions. [2020-04-17 18:26:41,044 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8171 transitions. Word has length 19 [2020-04-17 18:26:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:41,045 INFO L479 AbstractCegarLoop]: Abstraction has 2137 states and 8171 transitions. [2020-04-17 18:26:41,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:26:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8171 transitions. [2020-04-17 18:26:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:26:41,047 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:41,047 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 18:26:41,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:41,251 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 18:26:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:41,251 INFO L82 PathProgramCache]: Analyzing trace with hash -384450883, now seen corresponding path program 1 times [2020-04-17 18:26:41,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:41,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141728232] [2020-04-17 18:26:41,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:26:41,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141728232] [2020-04-17 18:26:41,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418079084] [2020-04-17 18:26:41,356 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 18:26:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:41,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:26:41,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:41,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:41,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-04-17 18:26:41,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747173837] [2020-04-17 18:26:41,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:26:41,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:41,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:26:41,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:26:41,579 INFO L87 Difference]: Start difference. First operand 2137 states and 8171 transitions. Second operand 22 states. [2020-04-17 18:26:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:47,913 INFO L93 Difference]: Finished difference Result 16713 states and 48959 transitions. [2020-04-17 18:26:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2020-04-17 18:26:47,913 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-04-17 18:26:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:47,943 INFO L225 Difference]: With dead ends: 16713 [2020-04-17 18:26:47,944 INFO L226 Difference]: Without dead ends: 16683 [2020-04-17 18:26:47,950 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11904 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4304, Invalid=25452, Unknown=0, NotChecked=0, Total=29756 [2020-04-17 18:26:48,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16683 states. [2020-04-17 18:26:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16683 to 2250. [2020-04-17 18:26:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2250 states. [2020-04-17 18:26:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 8709 transitions. [2020-04-17 18:26:48,118 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 8709 transitions. Word has length 21 [2020-04-17 18:26:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:48,118 INFO L479 AbstractCegarLoop]: Abstraction has 2250 states and 8709 transitions. [2020-04-17 18:26:48,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:26:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 8709 transitions. [2020-04-17 18:26:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:26:48,120 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:48,120 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 18:26:48,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:48,323 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 18:26:48,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:48,324 INFO L82 PathProgramCache]: Analyzing trace with hash -51603843, now seen corresponding path program 2 times [2020-04-17 18:26:48,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:48,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980792631] [2020-04-17 18:26:48,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:48,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980792631] [2020-04-17 18:26:48,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602166526] [2020-04-17 18:26:48,423 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 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 18:26:48,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:26:48,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:48,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:26:48,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:48,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:48,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-04-17 18:26:48,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000731380] [2020-04-17 18:26:48,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:26:48,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:26:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:26:48,640 INFO L87 Difference]: Start difference. First operand 2250 states and 8709 transitions. Second operand 23 states. [2020-04-17 18:26:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:53,350 INFO L93 Difference]: Finished difference Result 13252 states and 39669 transitions. [2020-04-17 18:26:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-04-17 18:26:53,350 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-04-17 18:26:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:53,371 INFO L225 Difference]: With dead ends: 13252 [2020-04-17 18:26:53,371 INFO L226 Difference]: Without dead ends: 13206 [2020-04-17 18:26:53,373 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6681 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2902, Invalid=14920, Unknown=0, NotChecked=0, Total=17822 [2020-04-17 18:26:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13206 states. [2020-04-17 18:26:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13206 to 2290. [2020-04-17 18:26:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2290 states. [2020-04-17 18:26:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 8926 transitions. [2020-04-17 18:26:53,499 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 8926 transitions. Word has length 21 [2020-04-17 18:26:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:53,500 INFO L479 AbstractCegarLoop]: Abstraction has 2290 states and 8926 transitions. [2020-04-17 18:26:53,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:26:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 8926 transitions. [2020-04-17 18:26:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:26:53,501 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:53,501 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 18:26:53,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:53,702 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 18:26:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1221323511, now seen corresponding path program 3 times [2020-04-17 18:26:53,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:53,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102183821] [2020-04-17 18:26:53,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:26:53,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102183821] [2020-04-17 18:26:53,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087739636] [2020-04-17 18:26:53,787 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 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 18:26:53,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:26:53,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:53,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:26:53,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:54,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:54,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-04-17 18:26:54,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507151053] [2020-04-17 18:26:54,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:26:54,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:54,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:26:54,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:26:54,009 INFO L87 Difference]: Start difference. First operand 2290 states and 8926 transitions. Second operand 22 states. [2020-04-17 18:26:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:26:58,436 INFO L93 Difference]: Finished difference Result 9895 states and 28949 transitions. [2020-04-17 18:26:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-04-17 18:26:58,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-04-17 18:26:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:26:58,452 INFO L225 Difference]: With dead ends: 9895 [2020-04-17 18:26:58,453 INFO L226 Difference]: Without dead ends: 9884 [2020-04-17 18:26:58,453 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6808 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2755, Invalid=15335, Unknown=0, NotChecked=0, Total=18090 [2020-04-17 18:26:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9884 states. [2020-04-17 18:26:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9884 to 2209. [2020-04-17 18:26:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2209 states. [2020-04-17 18:26:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 8538 transitions. [2020-04-17 18:26:58,536 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 8538 transitions. Word has length 21 [2020-04-17 18:26:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:26:58,536 INFO L479 AbstractCegarLoop]: Abstraction has 2209 states and 8538 transitions. [2020-04-17 18:26:58,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:26:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 8538 transitions. [2020-04-17 18:26:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:26:58,537 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:26:58,538 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 18:26:58,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:26:58,740 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 18:26:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:26:58,740 INFO L82 PathProgramCache]: Analyzing trace with hash 497614841, now seen corresponding path program 4 times [2020-04-17 18:26:58,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:26:58,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363462596] [2020-04-17 18:26:58,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:26:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:26:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:26:58,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363462596] [2020-04-17 18:26:58,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298738699] [2020-04-17 18:26:58,844 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 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 18:26:58,922 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:26:58,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:26:58,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:26:58,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:26:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:26:59,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:26:59,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-04-17 18:26:59,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459285059] [2020-04-17 18:26:59,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:26:59,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:26:59,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:26:59,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:26:59,060 INFO L87 Difference]: Start difference. First operand 2209 states and 8538 transitions. Second operand 22 states. [2020-04-17 18:27:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:27:03,363 INFO L93 Difference]: Finished difference Result 10187 states and 29725 transitions. [2020-04-17 18:27:03,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-04-17 18:27:03,363 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-04-17 18:27:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:27:03,381 INFO L225 Difference]: With dead ends: 10187 [2020-04-17 18:27:03,381 INFO L226 Difference]: Without dead ends: 10178 [2020-04-17 18:27:03,383 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6771 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2724, Invalid=14832, Unknown=0, NotChecked=0, Total=17556 [2020-04-17 18:27:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10178 states. [2020-04-17 18:27:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10178 to 2191. [2020-04-17 18:27:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2191 states. [2020-04-17 18:27:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 8469 transitions. [2020-04-17 18:27:03,477 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 8469 transitions. Word has length 21 [2020-04-17 18:27:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:27:03,477 INFO L479 AbstractCegarLoop]: Abstraction has 2191 states and 8469 transitions. [2020-04-17 18:27:03,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:27:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 8469 transitions. [2020-04-17 18:27:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:27:03,479 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:27:03,479 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 18:27:03,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:03,680 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 18:27:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:27:03,680 INFO L82 PathProgramCache]: Analyzing trace with hash 228952445, now seen corresponding path program 5 times [2020-04-17 18:27:03,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:27:03,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266890010] [2020-04-17 18:27:03,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:27:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:03,778 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 18:27:03,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266890010] [2020-04-17 18:27:03,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977875003] [2020-04-17 18:27:03,778 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:03,841 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:27:03,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:27:03,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:27:03,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:27:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:03,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:27:03,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-04-17 18:27:03,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506522307] [2020-04-17 18:27:03,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:27:03,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:27:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:27:03,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:27:03,975 INFO L87 Difference]: Start difference. First operand 2191 states and 8469 transitions. Second operand 22 states. [2020-04-17 18:27:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:27:11,539 INFO L93 Difference]: Finished difference Result 23959 states and 72678 transitions. [2020-04-17 18:27:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2020-04-17 18:27:11,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-04-17 18:27:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:27:11,581 INFO L225 Difference]: With dead ends: 23959 [2020-04-17 18:27:11,581 INFO L226 Difference]: Without dead ends: 23949 [2020-04-17 18:27:11,585 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19148 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6631, Invalid=38951, Unknown=0, NotChecked=0, Total=45582 [2020-04-17 18:27:11,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23949 states. [2020-04-17 18:27:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23949 to 2281. [2020-04-17 18:27:11,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2281 states. [2020-04-17 18:27:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 8895 transitions. [2020-04-17 18:27:11,861 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 8895 transitions. Word has length 21 [2020-04-17 18:27:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:27:11,862 INFO L479 AbstractCegarLoop]: Abstraction has 2281 states and 8895 transitions. [2020-04-17 18:27:11,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:27:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 8895 transitions. [2020-04-17 18:27:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:27:11,864 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:27:11,864 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 18:27:12,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:12,064 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 18:27:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:27:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1763023933, now seen corresponding path program 6 times [2020-04-17 18:27:12,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:27:12,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581223405] [2020-04-17 18:27:12,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:27:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:27:12,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581223405] [2020-04-17 18:27:12,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501279614] [2020-04-17 18:27:12,158 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:12,241 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:27:12,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:27:12,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:27:12,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:27:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:12,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:27:12,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-04-17 18:27:12,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7231123] [2020-04-17 18:27:12,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:27:12,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:27:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:27:12,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:27:12,400 INFO L87 Difference]: Start difference. First operand 2281 states and 8895 transitions. Second operand 22 states. [2020-04-17 18:27:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:27:15,847 INFO L93 Difference]: Finished difference Result 14847 states and 45792 transitions. [2020-04-17 18:27:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-04-17 18:27:15,847 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-04-17 18:27:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:27:15,871 INFO L225 Difference]: With dead ends: 14847 [2020-04-17 18:27:15,871 INFO L226 Difference]: Without dead ends: 14818 [2020-04-17 18:27:15,872 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2030, Invalid=8890, Unknown=0, NotChecked=0, Total=10920 [2020-04-17 18:27:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14818 states. [2020-04-17 18:27:15,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14818 to 2364. [2020-04-17 18:27:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2364 states. [2020-04-17 18:27:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 9320 transitions. [2020-04-17 18:27:15,987 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 9320 transitions. Word has length 21 [2020-04-17 18:27:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:27:15,987 INFO L479 AbstractCegarLoop]: Abstraction has 2364 states and 9320 transitions. [2020-04-17 18:27:15,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:27:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 9320 transitions. [2020-04-17 18:27:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:27:15,990 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:27:15,990 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 18:27:16,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:16,190 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]=== [2020-04-17 18:27:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:27:16,191 INFO L82 PathProgramCache]: Analyzing trace with hash -503695747, now seen corresponding path program 7 times [2020-04-17 18:27:16,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:27:16,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556246652] [2020-04-17 18:27:16,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:27:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:16,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556246652] [2020-04-17 18:27:16,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363728215] [2020-04-17 18:27:16,287 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:16,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:27:16,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:27:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:16,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:27:16,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-04-17 18:27:16,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506325155] [2020-04-17 18:27:16,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:27:16,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:27:16,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:27:16,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:27:16,512 INFO L87 Difference]: Start difference. First operand 2364 states and 9320 transitions. Second operand 23 states. [2020-04-17 18:27:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:27:21,469 INFO L93 Difference]: Finished difference Result 18566 states and 57363 transitions. [2020-04-17 18:27:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-04-17 18:27:21,470 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-04-17 18:27:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:27:21,503 INFO L225 Difference]: With dead ends: 18566 [2020-04-17 18:27:21,504 INFO L226 Difference]: Without dead ends: 18542 [2020-04-17 18:27:21,505 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8257 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3803, Invalid=17659, Unknown=0, NotChecked=0, Total=21462 [2020-04-17 18:27:21,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18542 states. [2020-04-17 18:27:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18542 to 2349. [2020-04-17 18:27:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2020-04-17 18:27:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 9316 transitions. [2020-04-17 18:27:21,659 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 9316 transitions. Word has length 21 [2020-04-17 18:27:21,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:27:21,659 INFO L479 AbstractCegarLoop]: Abstraction has 2349 states and 9316 transitions. [2020-04-17 18:27:21,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:27:21,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 9316 transitions. [2020-04-17 18:27:21,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:27:21,660 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:27:21,660 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 18:27:21,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:21,861 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]=== [2020-04-17 18:27:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:27:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash -493517827, now seen corresponding path program 8 times [2020-04-17 18:27:21,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:27:21,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317720085] [2020-04-17 18:27:21,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:27:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:21,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317720085] [2020-04-17 18:27:21,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185325026] [2020-04-17 18:27:21,971 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 18:27:22,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:27:22,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:27:22,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:27:22,094 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:27:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:22,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:27:22,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-04-17 18:27:22,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903119] [2020-04-17 18:27:22,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:27:22,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:27:22,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:27:22,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:27:22,351 INFO L87 Difference]: Start difference. First operand 2349 states and 9316 transitions. Second operand 23 states. [2020-04-17 18:27:27,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:27:27,736 INFO L93 Difference]: Finished difference Result 15987 states and 48378 transitions. [2020-04-17 18:27:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-04-17 18:27:27,737 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-04-17 18:27:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:27:27,765 INFO L225 Difference]: With dead ends: 15987 [2020-04-17 18:27:27,766 INFO L226 Difference]: Without dead ends: 15967 [2020-04-17 18:27:27,767 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8517 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3842, Invalid=18210, Unknown=0, NotChecked=0, Total=22052 [2020-04-17 18:27:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15967 states. [2020-04-17 18:27:27,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15967 to 2316. [2020-04-17 18:27:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2316 states. [2020-04-17 18:27:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 9184 transitions. [2020-04-17 18:27:27,904 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 9184 transitions. Word has length 21 [2020-04-17 18:27:27,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:27:27,905 INFO L479 AbstractCegarLoop]: Abstraction has 2316 states and 9184 transitions. [2020-04-17 18:27:27,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:27:27,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 9184 transitions. [2020-04-17 18:27:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:27:27,907 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:27:27,907 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:27:28,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:28,111 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]=== [2020-04-17 18:27:28,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:27:28,111 INFO L82 PathProgramCache]: Analyzing trace with hash -917262728, now seen corresponding path program 1 times [2020-04-17 18:27:28,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:27:28,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029132068] [2020-04-17 18:27:28,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:27:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:28,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029132068] [2020-04-17 18:27:28,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224116452] [2020-04-17 18:27:28,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:27:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:28,287 INFO L264 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:27:28,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:27:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:28,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:27:28,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:27:28,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923188091] [2020-04-17 18:27:28,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:27:28,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:27:28,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:27:28,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:27:28,408 INFO L87 Difference]: Start difference. First operand 2316 states and 9184 transitions. Second operand 17 states. [2020-04-17 18:27:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:27:28,881 INFO L93 Difference]: Finished difference Result 3583 states and 13281 transitions. [2020-04-17 18:27:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:27:28,881 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 18:27:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:27:28,888 INFO L225 Difference]: With dead ends: 3583 [2020-04-17 18:27:28,888 INFO L226 Difference]: Without dead ends: 3559 [2020-04-17 18:27:28,889 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:27:28,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2020-04-17 18:27:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2519. [2020-04-17 18:27:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2519 states. [2020-04-17 18:27:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 9807 transitions. [2020-04-17 18:27:28,941 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 9807 transitions. Word has length 21 [2020-04-17 18:27:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:27:28,941 INFO L479 AbstractCegarLoop]: Abstraction has 2519 states and 9807 transitions. [2020-04-17 18:27:28,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:27:28,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 9807 transitions. [2020-04-17 18:27:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:27:28,943 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:27:28,943 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 18:27:29,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:29,144 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]=== [2020-04-17 18:27:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:27:29,144 INFO L82 PathProgramCache]: Analyzing trace with hash -846758711, now seen corresponding path program 9 times [2020-04-17 18:27:29,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:27:29,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588547909] [2020-04-17 18:27:29,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:27:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:29,224 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 18:27:29,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588547909] [2020-04-17 18:27:29,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839707111] [2020-04-17 18:27:29,225 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 18:27:29,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:27:29,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:27:29,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:27:29,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:27:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:29,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:27:29,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-04-17 18:27:29,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893686877] [2020-04-17 18:27:29,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:27:29,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:27:29,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:27:29,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:27:29,440 INFO L87 Difference]: Start difference. First operand 2519 states and 9807 transitions. Second operand 22 states. [2020-04-17 18:27:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:27:37,858 INFO L93 Difference]: Finished difference Result 24757 states and 73242 transitions. [2020-04-17 18:27:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2020-04-17 18:27:37,858 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-04-17 18:27:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:27:37,913 INFO L225 Difference]: With dead ends: 24757 [2020-04-17 18:27:37,913 INFO L226 Difference]: Without dead ends: 24737 [2020-04-17 18:27:37,916 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25670 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8386, Invalid=51884, Unknown=0, NotChecked=0, Total=60270 [2020-04-17 18:27:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24737 states. [2020-04-17 18:27:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24737 to 2561. [2020-04-17 18:27:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2561 states. [2020-04-17 18:27:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 9991 transitions. [2020-04-17 18:27:38,143 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 9991 transitions. Word has length 21 [2020-04-17 18:27:38,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:27:38,143 INFO L479 AbstractCegarLoop]: Abstraction has 2561 states and 9991 transitions. [2020-04-17 18:27:38,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:27:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 9991 transitions. [2020-04-17 18:27:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:27:38,145 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:27:38,145 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 18:27:38,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:38,346 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]=== [2020-04-17 18:27:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:27:38,347 INFO L82 PathProgramCache]: Analyzing trace with hash 687312777, now seen corresponding path program 10 times [2020-04-17 18:27:38,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:27:38,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091281016] [2020-04-17 18:27:38,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:27:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:27:38,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091281016] [2020-04-17 18:27:38,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966391441] [2020-04-17 18:27:38,433 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 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 18:27:38,517 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:27:38,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:27:38,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:27:38,520 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:27:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:38,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:27:38,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-04-17 18:27:38,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787540548] [2020-04-17 18:27:38,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:27:38,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:27:38,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:27:38,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:27:38,681 INFO L87 Difference]: Start difference. First operand 2561 states and 9991 transitions. Second operand 22 states. [2020-04-17 18:27:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:27:41,769 INFO L93 Difference]: Finished difference Result 13198 states and 40565 transitions. [2020-04-17 18:27:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-04-17 18:27:41,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-04-17 18:27:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:27:41,791 INFO L225 Difference]: With dead ends: 13198 [2020-04-17 18:27:41,791 INFO L226 Difference]: Without dead ends: 13173 [2020-04-17 18:27:41,792 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3755 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1983, Invalid=8937, Unknown=0, NotChecked=0, Total=10920 [2020-04-17 18:27:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13173 states. [2020-04-17 18:27:41,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13173 to 2460. [2020-04-17 18:27:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2460 states. [2020-04-17 18:27:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 9556 transitions. [2020-04-17 18:27:41,906 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 9556 transitions. Word has length 21 [2020-04-17 18:27:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:27:41,906 INFO L479 AbstractCegarLoop]: Abstraction has 2460 states and 9556 transitions. [2020-04-17 18:27:41,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:27:41,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 9556 transitions. [2020-04-17 18:27:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:27:41,907 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:27:41,907 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 18:27:42,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:42,108 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]=== [2020-04-17 18:27:42,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:27:42,109 INFO L82 PathProgramCache]: Analyzing trace with hash 130244667, now seen corresponding path program 11 times [2020-04-17 18:27:42,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:27:42,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447939106] [2020-04-17 18:27:42,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:27:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:42,187 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 18:27:42,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447939106] [2020-04-17 18:27:42,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116149342] [2020-04-17 18:27:42,188 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:42,248 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:27:42,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:27:42,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:27:42,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:27:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:42,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:27:42,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-04-17 18:27:42,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258374505] [2020-04-17 18:27:42,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:27:42,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:27:42,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:27:42,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:27:42,385 INFO L87 Difference]: Start difference. First operand 2460 states and 9556 transitions. Second operand 22 states. [2020-04-17 18:27:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:27:48,041 INFO L93 Difference]: Finished difference Result 13557 states and 39396 transitions. [2020-04-17 18:27:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-04-17 18:27:48,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-04-17 18:27:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:27:48,064 INFO L225 Difference]: With dead ends: 13557 [2020-04-17 18:27:48,064 INFO L226 Difference]: Without dead ends: 13548 [2020-04-17 18:27:48,066 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11843 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4599, Invalid=25503, Unknown=0, NotChecked=0, Total=30102 [2020-04-17 18:27:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2020-04-17 18:27:48,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 2386. [2020-04-17 18:27:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2386 states. [2020-04-17 18:27:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 9218 transitions. [2020-04-17 18:27:48,186 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 9218 transitions. Word has length 21 [2020-04-17 18:27:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:27:48,186 INFO L479 AbstractCegarLoop]: Abstraction has 2386 states and 9218 transitions. [2020-04-17 18:27:48,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:27:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 9218 transitions. [2020-04-17 18:27:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:27:48,188 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:27:48,188 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 18:27:48,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:48,392 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]=== [2020-04-17 18:27:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:27:48,393 INFO L82 PathProgramCache]: Analyzing trace with hash 990308489, now seen corresponding path program 12 times [2020-04-17 18:27:48,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:27:48,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904155033] [2020-04-17 18:27:48,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:27:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:48,485 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 18:27:48,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904155033] [2020-04-17 18:27:48,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516967841] [2020-04-17 18:27:48,485 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:48,569 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:27:48,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:27:48,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:27:48,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:27:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:48,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:27:48,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-04-17 18:27:48,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630495548] [2020-04-17 18:27:48,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:27:48,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:27:48,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:27:48,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:27:48,814 INFO L87 Difference]: Start difference. First operand 2386 states and 9218 transitions. Second operand 22 states. [2020-04-17 18:27:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:27:55,753 INFO L93 Difference]: Finished difference Result 14903 states and 42877 transitions. [2020-04-17 18:27:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-04-17 18:27:55,754 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-04-17 18:27:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:27:55,781 INFO L225 Difference]: With dead ends: 14903 [2020-04-17 18:27:55,781 INFO L226 Difference]: Without dead ends: 14897 [2020-04-17 18:27:55,783 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17523 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6255, Invalid=35565, Unknown=0, NotChecked=0, Total=41820 [2020-04-17 18:27:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14897 states. [2020-04-17 18:27:55,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14897 to 2375. [2020-04-17 18:27:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2375 states. [2020-04-17 18:27:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 9206 transitions. [2020-04-17 18:27:55,916 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 9206 transitions. Word has length 21 [2020-04-17 18:27:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:27:55,916 INFO L479 AbstractCegarLoop]: Abstraction has 2375 states and 9206 transitions. [2020-04-17 18:27:55,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:27:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 9206 transitions. [2020-04-17 18:27:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:27:55,918 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:27:55,918 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 18:27:56,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:56,122 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]=== [2020-04-17 18:27:56,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:27:56,122 INFO L82 PathProgramCache]: Analyzing trace with hash -975339911, now seen corresponding path program 13 times [2020-04-17 18:27:56,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:27:56,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686191849] [2020-04-17 18:27:56,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:27:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:27:56,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686191849] [2020-04-17 18:27:56,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662548335] [2020-04-17 18:27:56,208 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:27:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:27:56,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:27:56,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:27:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:27:56,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:27:56,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-04-17 18:27:56,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300904502] [2020-04-17 18:27:56,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:27:56,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:27:56,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:27:56,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:27:56,409 INFO L87 Difference]: Start difference. First operand 2375 states and 9206 transitions. Second operand 22 states. [2020-04-17 18:28:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:01,541 INFO L93 Difference]: Finished difference Result 14939 states and 44322 transitions. [2020-04-17 18:28:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-04-17 18:28:01,541 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-04-17 18:28:01,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:01,575 INFO L225 Difference]: With dead ends: 14939 [2020-04-17 18:28:01,575 INFO L226 Difference]: Without dead ends: 14925 [2020-04-17 18:28:01,577 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9868 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3859, Invalid=20633, Unknown=0, NotChecked=0, Total=24492 [2020-04-17 18:28:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14925 states. [2020-04-17 18:28:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14925 to 2236. [2020-04-17 18:28:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2236 states. [2020-04-17 18:28:01,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 8705 transitions. [2020-04-17 18:28:01,708 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 8705 transitions. Word has length 21 [2020-04-17 18:28:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:01,708 INFO L479 AbstractCegarLoop]: Abstraction has 2236 states and 8705 transitions. [2020-04-17 18:28:01,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:28:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 8705 transitions. [2020-04-17 18:28:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:28:01,710 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:01,711 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:28:01,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:01,912 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]=== [2020-04-17 18:28:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:01,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1624171416, now seen corresponding path program 1 times [2020-04-17 18:28:01,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:01,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903287315] [2020-04-17 18:28:01,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:28:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:28:01,932 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:28:01,933 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:28:01,933 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:28:01,934 WARN L363 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:28:01,934 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-04-17 18:28:01,951 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,951 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,952 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,952 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,952 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,952 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,952 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,952 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,952 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,953 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,953 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,953 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,953 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,953 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,953 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,953 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,954 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,954 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,954 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,954 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,954 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,954 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,955 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,955 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,955 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,955 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,955 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,956 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,956 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,956 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,956 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,958 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,958 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,958 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,958 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,959 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,959 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,959 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,959 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,959 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,959 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,959 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,960 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,960 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,960 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,960 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,960 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,961 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,961 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,961 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,961 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,961 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,961 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,962 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,962 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,962 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,962 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,962 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,962 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,963 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,963 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,963 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,963 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,963 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,963 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,963 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,964 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,964 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,964 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,965 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,965 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,965 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,965 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,966 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,966 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,966 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,966 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,966 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,966 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,967 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,967 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,967 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,967 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,968 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,968 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,968 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,968 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,968 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,968 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,968 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,969 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,969 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,969 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,970 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,970 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,970 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,970 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,970 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,970 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,971 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,971 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,971 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,971 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,971 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,971 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,972 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,972 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,972 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,972 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,972 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,973 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,974 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,974 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,974 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,974 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,975 WARN L315 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,975 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,976 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,977 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,977 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,977 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,977 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,977 WARN L315 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,978 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,979 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,979 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,979 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,979 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,979 WARN L315 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,980 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,980 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,980 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,981 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,981 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,981 WARN L315 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,982 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,982 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,983 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,983 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,983 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,984 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,984 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,984 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,984 WARN L315 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,984 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,985 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,986 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,986 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,986 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,986 WARN L315 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,987 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,988 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,988 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,988 WARN L315 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,988 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,989 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,989 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,990 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,990 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,990 WARN L315 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:28:01,991 INFO L251 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-04-17 18:28:01,991 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:28:01,991 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:28:01,991 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:28:01,991 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:28:01,992 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:28:01,992 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:28:01,992 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:28:01,992 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:28:01,993 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 133 transitions, 356 flow [2020-04-17 18:28:01,994 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 148 places, 133 transitions, 356 flow [2020-04-17 18:28:02,014 INFO L129 PetriNetUnfolder]: 8/159 cut-off events. [2020-04-17 18:28:02,014 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2020-04-17 18:28:02,015 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 159 events. 8/159 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 297 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 186. Up to 12 conditions per place. [2020-04-17 18:28:02,020 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 148 places, 133 transitions, 356 flow [2020-04-17 18:28:02,036 INFO L129 PetriNetUnfolder]: 8/159 cut-off events. [2020-04-17 18:28:02,037 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2020-04-17 18:28:02,038 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 159 events. 8/159 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 297 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 186. Up to 12 conditions per place. [2020-04-17 18:28:02,042 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2860 [2020-04-17 18:28:02,043 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:28:03,692 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-04-17 18:28:04,226 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3247 [2020-04-17 18:28:04,226 INFO L214 etLargeBlockEncoding]: Total number of compositions: 119 [2020-04-17 18:28:04,226 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 39 transitions, 168 flow [2020-04-17 18:28:04,568 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6191 states. [2020-04-17 18:28:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states. [2020-04-17 18:28:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-04-17 18:28:04,569 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:04,569 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-04-17 18:28:04,569 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 18:28:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:04,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1129837, now seen corresponding path program 1 times [2020-04-17 18:28:04,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:04,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748219988] [2020-04-17 18:28:04,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:04,586 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 18:28:04,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748219988] [2020-04-17 18:28:04,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:28:04,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 18:28:04,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601067679] [2020-04-17 18:28:04,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:28:04,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:04,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:28:04,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:28:04,588 INFO L87 Difference]: Start difference. First operand 6191 states. Second operand 3 states. [2020-04-17 18:28:04,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:04,665 INFO L93 Difference]: Finished difference Result 5844 states and 26316 transitions. [2020-04-17 18:28:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:28:04,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-04-17 18:28:04,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:04,687 INFO L225 Difference]: With dead ends: 5844 [2020-04-17 18:28:04,687 INFO L226 Difference]: Without dead ends: 5479 [2020-04-17 18:28:04,688 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 18:28:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5479 states. [2020-04-17 18:28:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5479 to 5479. [2020-04-17 18:28:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5479 states. [2020-04-17 18:28:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 24493 transitions. [2020-04-17 18:28:04,844 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 24493 transitions. Word has length 3 [2020-04-17 18:28:04,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:04,844 INFO L479 AbstractCegarLoop]: Abstraction has 5479 states and 24493 transitions. [2020-04-17 18:28:04,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:28:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 24493 transitions. [2020-04-17 18:28:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:28:04,844 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:04,844 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:28:04,844 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 18:28:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:04,845 INFO L82 PathProgramCache]: Analyzing trace with hash 683068333, now seen corresponding path program 1 times [2020-04-17 18:28:04,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:04,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511038194] [2020-04-17 18:28:04,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:04,878 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 18:28:04,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511038194] [2020-04-17 18:28:04,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:28:04,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:28:04,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480542206] [2020-04-17 18:28:04,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:28:04,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:28:04,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:28:04,881 INFO L87 Difference]: Start difference. First operand 5479 states and 24493 transitions. Second operand 5 states. [2020-04-17 18:28:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:05,027 INFO L93 Difference]: Finished difference Result 11373 states and 46632 transitions. [2020-04-17 18:28:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:28:05,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-17 18:28:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:05,055 INFO L225 Difference]: With dead ends: 11373 [2020-04-17 18:28:05,055 INFO L226 Difference]: Without dead ends: 11366 [2020-04-17 18:28:05,055 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 18:28:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11366 states. [2020-04-17 18:28:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11366 to 6331. [2020-04-17 18:28:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6331 states. [2020-04-17 18:28:05,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 28544 transitions. [2020-04-17 18:28:05,274 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 28544 transitions. Word has length 9 [2020-04-17 18:28:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:05,274 INFO L479 AbstractCegarLoop]: Abstraction has 6331 states and 28544 transitions. [2020-04-17 18:28:05,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:28:05,274 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 28544 transitions. [2020-04-17 18:28:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:28:05,274 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:05,275 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:28:05,275 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 18:28:05,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:05,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1472806829, now seen corresponding path program 1 times [2020-04-17 18:28:05,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:05,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923951880] [2020-04-17 18:28:05,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:05,328 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 18:28:05,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923951880] [2020-04-17 18:28:05,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579712565] [2020-04-17 18:28:05,329 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 18:28:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:05,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:28:05,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:05,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:05,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 18:28:05,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119868291] [2020-04-17 18:28:05,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:28:05,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:05,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:28:05,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:28:05,450 INFO L87 Difference]: Start difference. First operand 6331 states and 28544 transitions. Second operand 14 states. [2020-04-17 18:28:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:05,722 INFO L93 Difference]: Finished difference Result 11081 states and 46826 transitions. [2020-04-17 18:28:05,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:28:05,722 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-04-17 18:28:05,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:05,748 INFO L225 Difference]: With dead ends: 11081 [2020-04-17 18:28:05,748 INFO L226 Difference]: Without dead ends: 11068 [2020-04-17 18:28:05,749 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:28:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11068 states. [2020-04-17 18:28:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11068 to 7391. [2020-04-17 18:28:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7391 states. [2020-04-17 18:28:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7391 states to 7391 states and 33694 transitions. [2020-04-17 18:28:05,978 INFO L78 Accepts]: Start accepts. Automaton has 7391 states and 33694 transitions. Word has length 13 [2020-04-17 18:28:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:05,979 INFO L479 AbstractCegarLoop]: Abstraction has 7391 states and 33694 transitions. [2020-04-17 18:28:05,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:28:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 7391 states and 33694 transitions. [2020-04-17 18:28:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:28:05,979 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:05,980 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:28:06,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:06,183 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 18:28:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:06,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1682184658, now seen corresponding path program 1 times [2020-04-17 18:28:06,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:06,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021068472] [2020-04-17 18:28:06,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:06,240 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 18:28:06,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021068472] [2020-04-17 18:28:06,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146146836] [2020-04-17 18:28:06,241 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 18:28:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:06,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:28:06,322 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:06,420 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 18:28:06,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:06,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:28:06,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792264646] [2020-04-17 18:28:06,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:28:06,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:06,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:28:06,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:28:06,421 INFO L87 Difference]: Start difference. First operand 7391 states and 33694 transitions. Second operand 18 states. [2020-04-17 18:28:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:08,101 INFO L93 Difference]: Finished difference Result 23025 states and 86555 transitions. [2020-04-17 18:28:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:28:08,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-04-17 18:28:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:08,153 INFO L225 Difference]: With dead ends: 23025 [2020-04-17 18:28:08,154 INFO L226 Difference]: Without dead ends: 23014 [2020-04-17 18:28:08,154 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=376, Invalid=1430, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:28:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23014 states. [2020-04-17 18:28:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23014 to 7423. [2020-04-17 18:28:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7423 states. [2020-04-17 18:28:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 33792 transitions. [2020-04-17 18:28:08,510 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 33792 transitions. Word has length 15 [2020-04-17 18:28:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:08,511 INFO L479 AbstractCegarLoop]: Abstraction has 7423 states and 33792 transitions. [2020-04-17 18:28:08,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:28:08,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 33792 transitions. [2020-04-17 18:28:08,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:28:08,511 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:08,511 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:28:08,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:08,712 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 18:28:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:08,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1971855314, now seen corresponding path program 2 times [2020-04-17 18:28:08,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:08,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890185080] [2020-04-17 18:28:08,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:08,777 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 18:28:08,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890185080] [2020-04-17 18:28:08,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120909533] [2020-04-17 18:28:08,778 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 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 18:28:08,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:28:08,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:28:08,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:28:08,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:08,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:08,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:28:08,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884670502] [2020-04-17 18:28:08,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:28:08,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:08,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:28:08,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:28:08,938 INFO L87 Difference]: Start difference. First operand 7423 states and 33792 transitions. Second operand 18 states. [2020-04-17 18:28:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:10,042 INFO L93 Difference]: Finished difference Result 29614 states and 114072 transitions. [2020-04-17 18:28:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:28:10,043 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-04-17 18:28:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:10,132 INFO L225 Difference]: With dead ends: 29614 [2020-04-17 18:28:10,133 INFO L226 Difference]: Without dead ends: 29600 [2020-04-17 18:28:10,133 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:28:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29600 states. [2020-04-17 18:28:11,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29600 to 7168. [2020-04-17 18:28:11,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7168 states. [2020-04-17 18:28:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7168 states to 7168 states and 32668 transitions. [2020-04-17 18:28:11,415 INFO L78 Accepts]: Start accepts. Automaton has 7168 states and 32668 transitions. Word has length 15 [2020-04-17 18:28:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:11,416 INFO L479 AbstractCegarLoop]: Abstraction has 7168 states and 32668 transitions. [2020-04-17 18:28:11,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:28:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7168 states and 32668 transitions. [2020-04-17 18:28:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:28:11,417 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:11,417 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:28:11,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:11,619 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 18:28:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:11,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1257206282, now seen corresponding path program 1 times [2020-04-17 18:28:11,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:11,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234639727] [2020-04-17 18:28:11,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:11,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234639727] [2020-04-17 18:28:11,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371774488] [2020-04-17 18:28:11,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:11,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:28:11,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:11,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:11,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:28:11,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049858387] [2020-04-17 18:28:11,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:28:11,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:11,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:28:11,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:28:11,851 INFO L87 Difference]: Start difference. First operand 7168 states and 32668 transitions. Second operand 16 states. [2020-04-17 18:28:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:12,214 INFO L93 Difference]: Finished difference Result 12406 states and 53241 transitions. [2020-04-17 18:28:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:28:12,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2020-04-17 18:28:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:12,247 INFO L225 Difference]: With dead ends: 12406 [2020-04-17 18:28:12,248 INFO L226 Difference]: Without dead ends: 12384 [2020-04-17 18:28:12,248 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:28:12,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12384 states. [2020-04-17 18:28:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12384 to 8447. [2020-04-17 18:28:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8447 states. [2020-04-17 18:28:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8447 states to 8447 states and 38789 transitions. [2020-04-17 18:28:12,528 INFO L78 Accepts]: Start accepts. Automaton has 8447 states and 38789 transitions. Word has length 17 [2020-04-17 18:28:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:12,528 INFO L479 AbstractCegarLoop]: Abstraction has 8447 states and 38789 transitions. [2020-04-17 18:28:12,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:28:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 8447 states and 38789 transitions. [2020-04-17 18:28:12,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:28:12,529 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:12,529 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:28:12,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:12,730 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 18:28:12,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:12,730 INFO L82 PathProgramCache]: Analyzing trace with hash 631632905, now seen corresponding path program 1 times [2020-04-17 18:28:12,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:12,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937357399] [2020-04-17 18:28:12,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:12,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937357399] [2020-04-17 18:28:12,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565317602] [2020-04-17 18:28:12,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:12,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:28:12,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:13,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:13,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-04-17 18:28:13,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154092387] [2020-04-17 18:28:13,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:28:13,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:13,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:28:13,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:28:13,066 INFO L87 Difference]: Start difference. First operand 8447 states and 38789 transitions. Second operand 20 states. [2020-04-17 18:28:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:14,629 INFO L93 Difference]: Finished difference Result 23172 states and 91050 transitions. [2020-04-17 18:28:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 18:28:14,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2020-04-17 18:28:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:14,709 INFO L225 Difference]: With dead ends: 23172 [2020-04-17 18:28:14,710 INFO L226 Difference]: Without dead ends: 23156 [2020-04-17 18:28:14,710 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=521, Invalid=2029, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 18:28:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23156 states. [2020-04-17 18:28:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23156 to 8503. [2020-04-17 18:28:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8503 states. [2020-04-17 18:28:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8503 states to 8503 states and 38957 transitions. [2020-04-17 18:28:15,386 INFO L78 Accepts]: Start accepts. Automaton has 8503 states and 38957 transitions. Word has length 19 [2020-04-17 18:28:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:15,386 INFO L479 AbstractCegarLoop]: Abstraction has 8503 states and 38957 transitions. [2020-04-17 18:28:15,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:28:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 8503 states and 38957 transitions. [2020-04-17 18:28:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:28:15,387 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:15,387 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:28:15,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:15,591 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 18:28:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:15,591 INFO L82 PathProgramCache]: Analyzing trace with hash -968342726, now seen corresponding path program 1 times [2020-04-17 18:28:15,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:15,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553767647] [2020-04-17 18:28:15,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:15,657 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 18:28:15,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553767647] [2020-04-17 18:28:15,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506412613] [2020-04-17 18:28:15,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:15,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:28:15,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:15,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:15,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-04-17 18:28:15,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423088765] [2020-04-17 18:28:15,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:28:15,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:15,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:28:15,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:28:15,872 INFO L87 Difference]: Start difference. First operand 8503 states and 38957 transitions. Second operand 20 states. [2020-04-17 18:28:17,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:17,113 INFO L93 Difference]: Finished difference Result 24677 states and 96805 transitions. [2020-04-17 18:28:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:28:17,113 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2020-04-17 18:28:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:17,179 INFO L225 Difference]: With dead ends: 24677 [2020-04-17 18:28:17,180 INFO L226 Difference]: Without dead ends: 24658 [2020-04-17 18:28:17,180 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=484, Invalid=1678, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 18:28:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24658 states. [2020-04-17 18:28:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24658 to 8577. [2020-04-17 18:28:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8577 states. [2020-04-17 18:28:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8577 states to 8577 states and 39244 transitions. [2020-04-17 18:28:17,583 INFO L78 Accepts]: Start accepts. Automaton has 8577 states and 39244 transitions. Word has length 19 [2020-04-17 18:28:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:17,583 INFO L479 AbstractCegarLoop]: Abstraction has 8577 states and 39244 transitions. [2020-04-17 18:28:17,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:28:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 8577 states and 39244 transitions. [2020-04-17 18:28:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:28:17,584 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:17,584 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:28:17,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:17,785 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 18:28:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1289406842, now seen corresponding path program 2 times [2020-04-17 18:28:17,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:17,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647554683] [2020-04-17 18:28:17,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:17,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647554683] [2020-04-17 18:28:17,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264565590] [2020-04-17 18:28:17,859 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 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 18:28:17,939 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:28:17,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:28:17,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:28:17,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:28:18,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:18,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2020-04-17 18:28:18,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475908693] [2020-04-17 18:28:18,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:28:18,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:18,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:28:18,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:28:18,041 INFO L87 Difference]: Start difference. First operand 8577 states and 39244 transitions. Second operand 19 states. [2020-04-17 18:28:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:19,263 INFO L93 Difference]: Finished difference Result 19940 states and 80274 transitions. [2020-04-17 18:28:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:28:19,263 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-04-17 18:28:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:19,309 INFO L225 Difference]: With dead ends: 19940 [2020-04-17 18:28:19,310 INFO L226 Difference]: Without dead ends: 19921 [2020-04-17 18:28:19,310 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:28:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19921 states. [2020-04-17 18:28:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19921 to 8468. [2020-04-17 18:28:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8468 states. [2020-04-17 18:28:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8468 states to 8468 states and 38762 transitions. [2020-04-17 18:28:19,639 INFO L78 Accepts]: Start accepts. Automaton has 8468 states and 38762 transitions. Word has length 19 [2020-04-17 18:28:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:19,639 INFO L479 AbstractCegarLoop]: Abstraction has 8468 states and 38762 transitions. [2020-04-17 18:28:19,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:28:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 8468 states and 38762 transitions. [2020-04-17 18:28:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:28:19,640 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:19,640 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:28:19,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:19,842 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 18:28:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:19,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1289437129, now seen corresponding path program 2 times [2020-04-17 18:28:19,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:19,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703439853] [2020-04-17 18:28:19,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:19,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703439853] [2020-04-17 18:28:19,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999458513] [2020-04-17 18:28:19,928 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 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 18:28:20,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:28:20,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:28:20,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:28:20,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:28:20,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:20,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2020-04-17 18:28:20,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25158169] [2020-04-17 18:28:20,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:28:20,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:20,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:28:20,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:28:20,135 INFO L87 Difference]: Start difference. First operand 8468 states and 38762 transitions. Second operand 19 states. [2020-04-17 18:28:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:20,999 INFO L93 Difference]: Finished difference Result 22845 states and 94088 transitions. [2020-04-17 18:28:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:28:20,999 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-04-17 18:28:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:21,055 INFO L225 Difference]: With dead ends: 22845 [2020-04-17 18:28:21,055 INFO L226 Difference]: Without dead ends: 22820 [2020-04-17 18:28:21,056 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:28:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22820 states. [2020-04-17 18:28:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22820 to 8329. [2020-04-17 18:28:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8329 states. [2020-04-17 18:28:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 38184 transitions. [2020-04-17 18:28:21,417 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 38184 transitions. Word has length 19 [2020-04-17 18:28:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:21,417 INFO L479 AbstractCegarLoop]: Abstraction has 8329 states and 38184 transitions. [2020-04-17 18:28:21,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:28:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 38184 transitions. [2020-04-17 18:28:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:28:21,418 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:21,418 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 18:28:21,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:21,619 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 18:28:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:21,620 INFO L82 PathProgramCache]: Analyzing trace with hash -848936583, now seen corresponding path program 1 times [2020-04-17 18:28:21,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:21,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005552156] [2020-04-17 18:28:21,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:28:21,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005552156] [2020-04-17 18:28:21,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123436279] [2020-04-17 18:28:21,711 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 18:28:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:21,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:28:21,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:21,936 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 18:28:21,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:21,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2020-04-17 18:28:21,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379068229] [2020-04-17 18:28:21,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:28:21,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:21,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:28:21,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:28:21,938 INFO L87 Difference]: Start difference. First operand 8329 states and 38184 transitions. Second operand 23 states. [2020-04-17 18:28:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:27,948 INFO L93 Difference]: Finished difference Result 49750 states and 175587 transitions. [2020-04-17 18:28:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-04-17 18:28:27,948 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-04-17 18:28:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:28,064 INFO L225 Difference]: With dead ends: 49750 [2020-04-17 18:28:28,064 INFO L226 Difference]: Without dead ends: 49701 [2020-04-17 18:28:28,066 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8142 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3170, Invalid=17710, Unknown=0, NotChecked=0, Total=20880 [2020-04-17 18:28:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49701 states. [2020-04-17 18:28:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49701 to 8689. [2020-04-17 18:28:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8689 states. [2020-04-17 18:28:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 39965 transitions. [2020-04-17 18:28:28,916 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 39965 transitions. Word has length 21 [2020-04-17 18:28:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:28,916 INFO L479 AbstractCegarLoop]: Abstraction has 8689 states and 39965 transitions. [2020-04-17 18:28:28,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:28:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 39965 transitions. [2020-04-17 18:28:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:28:28,917 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:28,917 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 18:28:29,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:29,118 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 18:28:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:29,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1408812985, now seen corresponding path program 2 times [2020-04-17 18:28:29,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:29,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827391881] [2020-04-17 18:28:29,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:29,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827391881] [2020-04-17 18:28:29,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489379508] [2020-04-17 18:28:29,217 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 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 18:28:29,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:28:29,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:28:29,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:28:29,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:29,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:29,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-04-17 18:28:29,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428333562] [2020-04-17 18:28:29,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:28:29,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:29,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:28:29,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:28:29,537 INFO L87 Difference]: Start difference. First operand 8689 states and 39965 transitions. Second operand 24 states. [2020-04-17 18:28:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:35,270 INFO L93 Difference]: Finished difference Result 56458 states and 204600 transitions. [2020-04-17 18:28:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-04-17 18:28:35,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-04-17 18:28:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:35,400 INFO L225 Difference]: With dead ends: 56458 [2020-04-17 18:28:35,400 INFO L226 Difference]: Without dead ends: 56381 [2020-04-17 18:28:35,401 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6202 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2803, Invalid=13967, Unknown=0, NotChecked=0, Total=16770 [2020-04-17 18:28:35,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56381 states. [2020-04-17 18:28:36,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56381 to 8775. [2020-04-17 18:28:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8775 states. [2020-04-17 18:28:36,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8775 states to 8775 states and 40541 transitions. [2020-04-17 18:28:36,105 INFO L78 Accepts]: Start accepts. Automaton has 8775 states and 40541 transitions. Word has length 21 [2020-04-17 18:28:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:36,105 INFO L479 AbstractCegarLoop]: Abstraction has 8775 states and 40541 transitions. [2020-04-17 18:28:36,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:28:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand 8775 states and 40541 transitions. [2020-04-17 18:28:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:28:36,106 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:36,106 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 18:28:36,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:36,307 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 18:28:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1091422073, now seen corresponding path program 3 times [2020-04-17 18:28:36,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:36,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474856746] [2020-04-17 18:28:36,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:36,437 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 18:28:36,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474856746] [2020-04-17 18:28:36,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357813450] [2020-04-17 18:28:36,438 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 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 18:28:36,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:28:36,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:28:36,520 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:28:36,521 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:36,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:36,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2020-04-17 18:28:36,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532429457] [2020-04-17 18:28:36,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:28:36,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:36,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:28:36,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:28:36,663 INFO L87 Difference]: Start difference. First operand 8775 states and 40541 transitions. Second operand 23 states. [2020-04-17 18:28:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:42,263 INFO L93 Difference]: Finished difference Result 52830 states and 186318 transitions. [2020-04-17 18:28:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-04-17 18:28:42,263 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-04-17 18:28:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:42,391 INFO L225 Difference]: With dead ends: 52830 [2020-04-17 18:28:42,391 INFO L226 Difference]: Without dead ends: 52813 [2020-04-17 18:28:42,392 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8677 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3501, Invalid=18551, Unknown=0, NotChecked=0, Total=22052 [2020-04-17 18:28:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52813 states. [2020-04-17 18:28:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52813 to 8850. [2020-04-17 18:28:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8850 states. [2020-04-17 18:28:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8850 states to 8850 states and 40968 transitions. [2020-04-17 18:28:43,459 INFO L78 Accepts]: Start accepts. Automaton has 8850 states and 40968 transitions. Word has length 21 [2020-04-17 18:28:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:43,459 INFO L479 AbstractCegarLoop]: Abstraction has 8850 states and 40968 transitions. [2020-04-17 18:28:43,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:28:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 8850 states and 40968 transitions. [2020-04-17 18:28:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:28:43,460 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:43,460 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 18:28:43,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:43,662 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 18:28:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:43,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1430553849, now seen corresponding path program 4 times [2020-04-17 18:28:43,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:43,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008565567] [2020-04-17 18:28:43,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:43,745 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 18:28:43,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008565567] [2020-04-17 18:28:43,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505522664] [2020-04-17 18:28:43,746 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 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 18:28:43,823 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:28:43,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:28:43,825 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:28:43,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:43,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:43,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-04-17 18:28:43,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762808307] [2020-04-17 18:28:43,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:28:43,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:28:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:28:43,984 INFO L87 Difference]: Start difference. First operand 8850 states and 40968 transitions. Second operand 24 states. [2020-04-17 18:28:48,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:48,567 INFO L93 Difference]: Finished difference Result 57837 states and 210293 transitions. [2020-04-17 18:28:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-04-17 18:28:48,567 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-04-17 18:28:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:48,700 INFO L225 Difference]: With dead ends: 57837 [2020-04-17 18:28:48,700 INFO L226 Difference]: Without dead ends: 57780 [2020-04-17 18:28:48,701 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5818 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2692, Invalid=12808, Unknown=0, NotChecked=0, Total=15500 [2020-04-17 18:28:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57780 states. [2020-04-17 18:28:49,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57780 to 9015. [2020-04-17 18:28:49,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9015 states. [2020-04-17 18:28:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 42019 transitions. [2020-04-17 18:28:49,783 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 42019 transitions. Word has length 21 [2020-04-17 18:28:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:49,783 INFO L479 AbstractCegarLoop]: Abstraction has 9015 states and 42019 transitions. [2020-04-17 18:28:49,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:28:49,783 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 42019 transitions. [2020-04-17 18:28:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:28:49,784 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:49,785 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 18:28:49,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:49,985 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 18:28:49,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:49,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2125563079, now seen corresponding path program 5 times [2020-04-17 18:28:49,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:49,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866282538] [2020-04-17 18:28:49,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:50,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866282538] [2020-04-17 18:28:50,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269810022] [2020-04-17 18:28:50,075 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_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 18:28:50,156 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:28:50,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:28:50,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:28:50,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:50,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:50,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-04-17 18:28:50,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977576488] [2020-04-17 18:28:50,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:28:50,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:50,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:28:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:28:50,346 INFO L87 Difference]: Start difference. First operand 9015 states and 42019 transitions. Second operand 24 states. [2020-04-17 18:28:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:28:54,088 INFO L93 Difference]: Finished difference Result 68007 states and 249502 transitions. [2020-04-17 18:28:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-04-17 18:28:54,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-04-17 18:28:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:28:54,693 INFO L225 Difference]: With dead ends: 68007 [2020-04-17 18:28:54,693 INFO L226 Difference]: Without dead ends: 67995 [2020-04-17 18:28:54,694 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4309 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2157, Invalid=10053, Unknown=0, NotChecked=0, Total=12210 [2020-04-17 18:28:54,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67995 states. [2020-04-17 18:28:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67995 to 8816. [2020-04-17 18:28:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8816 states. [2020-04-17 18:28:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8816 states to 8816 states and 41106 transitions. [2020-04-17 18:28:55,490 INFO L78 Accepts]: Start accepts. Automaton has 8816 states and 41106 transitions. Word has length 21 [2020-04-17 18:28:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:28:55,490 INFO L479 AbstractCegarLoop]: Abstraction has 8816 states and 41106 transitions. [2020-04-17 18:28:55,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:28:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 8816 states and 41106 transitions. [2020-04-17 18:28:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:28:55,491 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:28:55,491 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 18:28:55,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:28:55,694 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 18:28:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:28:55,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2096487559, now seen corresponding path program 6 times [2020-04-17 18:28:55,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:28:55,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459729207] [2020-04-17 18:28:55,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:28:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:28:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:55,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459729207] [2020-04-17 18:28:55,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026104246] [2020-04-17 18:28:55,786 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 18:28:55,863 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:28:55,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:28:55,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:28:55,864 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:28:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:28:55,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:28:55,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-04-17 18:28:55,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820257708] [2020-04-17 18:28:56,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:28:56,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:28:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:28:56,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:28:56,001 INFO L87 Difference]: Start difference. First operand 8816 states and 41106 transitions. Second operand 24 states. [2020-04-17 18:29:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:00,797 INFO L93 Difference]: Finished difference Result 75874 states and 283623 transitions. [2020-04-17 18:29:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-04-17 18:29:00,798 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-04-17 18:29:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:01,006 INFO L225 Difference]: With dead ends: 75874 [2020-04-17 18:29:01,007 INFO L226 Difference]: Without dead ends: 75841 [2020-04-17 18:29:01,007 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4110 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2116, Invalid=9656, Unknown=0, NotChecked=0, Total=11772 [2020-04-17 18:29:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75841 states. [2020-04-17 18:29:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75841 to 8779. [2020-04-17 18:29:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8779 states. [2020-04-17 18:29:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8779 states to 8779 states and 41239 transitions. [2020-04-17 18:29:01,963 INFO L78 Accepts]: Start accepts. Automaton has 8779 states and 41239 transitions. Word has length 21 [2020-04-17 18:29:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:01,963 INFO L479 AbstractCegarLoop]: Abstraction has 8779 states and 41239 transitions. [2020-04-17 18:29:01,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:29:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 8779 states and 41239 transitions. [2020-04-17 18:29:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 18:29:01,964 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:01,964 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:29:02,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:02,165 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 18:29:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash -305805433, now seen corresponding path program 1 times [2020-04-17 18:29:02,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:02,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367671956] [2020-04-17 18:29:02,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:02,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367671956] [2020-04-17 18:29:02,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19803625] [2020-04-17 18:29:02,249 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 18:29:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:02,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:29:02,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:02,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:02,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:29:02,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562636000] [2020-04-17 18:29:02,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:29:02,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:29:02,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:29:02,410 INFO L87 Difference]: Start difference. First operand 8779 states and 41239 transitions. Second operand 18 states. [2020-04-17 18:29:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:02,840 INFO L93 Difference]: Finished difference Result 14494 states and 64351 transitions. [2020-04-17 18:29:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:29:02,840 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 18:29:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:02,877 INFO L225 Difference]: With dead ends: 14494 [2020-04-17 18:29:02,877 INFO L226 Difference]: Without dead ends: 14463 [2020-04-17 18:29:02,877 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:29:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14463 states. [2020-04-17 18:29:03,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14463 to 10308. [2020-04-17 18:29:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10308 states. [2020-04-17 18:29:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10308 states to 10308 states and 48350 transitions. [2020-04-17 18:29:03,185 INFO L78 Accepts]: Start accepts. Automaton has 10308 states and 48350 transitions. Word has length 21 [2020-04-17 18:29:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:03,185 INFO L479 AbstractCegarLoop]: Abstraction has 10308 states and 48350 transitions. [2020-04-17 18:29:03,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:29:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 10308 states and 48350 transitions. [2020-04-17 18:29:03,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:29:03,187 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:03,187 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:29:03,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:03,388 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 18:29:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1520619002, now seen corresponding path program 1 times [2020-04-17 18:29:03,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:03,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030890397] [2020-04-17 18:29:03,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:03,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030890397] [2020-04-17 18:29:03,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131502231] [2020-04-17 18:29:03,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:03,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:29:03,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:03,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:03,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2020-04-17 18:29:03,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142999783] [2020-04-17 18:29:03,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:29:04,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:29:04,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:29:04,016 INFO L87 Difference]: Start difference. First operand 10308 states and 48350 transitions. Second operand 22 states. [2020-04-17 18:29:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:06,457 INFO L93 Difference]: Finished difference Result 26201 states and 106927 transitions. [2020-04-17 18:29:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 18:29:06,458 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2020-04-17 18:29:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:06,522 INFO L225 Difference]: With dead ends: 26201 [2020-04-17 18:29:06,522 INFO L226 Difference]: Without dead ends: 26178 [2020-04-17 18:29:06,523 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 18:29:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26178 states. [2020-04-17 18:29:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26178 to 10322. [2020-04-17 18:29:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10322 states. [2020-04-17 18:29:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10322 states to 10322 states and 48233 transitions. [2020-04-17 18:29:06,957 INFO L78 Accepts]: Start accepts. Automaton has 10322 states and 48233 transitions. Word has length 23 [2020-04-17 18:29:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:06,957 INFO L479 AbstractCegarLoop]: Abstraction has 10322 states and 48233 transitions. [2020-04-17 18:29:06,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:29:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 10322 states and 48233 transitions. [2020-04-17 18:29:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:29:06,959 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:06,959 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:29:07,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:07,160 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 18:29:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2131590985, now seen corresponding path program 1 times [2020-04-17 18:29:07,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:07,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482387214] [2020-04-17 18:29:07,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:07,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482387214] [2020-04-17 18:29:07,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27302326] [2020-04-17 18:29:07,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:07,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:29:07,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:07,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:07,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2020-04-17 18:29:07,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098892286] [2020-04-17 18:29:07,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:29:07,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:07,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:29:07,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:29:07,447 INFO L87 Difference]: Start difference. First operand 10322 states and 48233 transitions. Second operand 22 states. [2020-04-17 18:29:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:09,218 INFO L93 Difference]: Finished difference Result 27459 states and 111719 transitions. [2020-04-17 18:29:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 18:29:09,218 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2020-04-17 18:29:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:09,296 INFO L225 Difference]: With dead ends: 27459 [2020-04-17 18:29:09,296 INFO L226 Difference]: Without dead ends: 27434 [2020-04-17 18:29:09,296 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=611, Invalid=2041, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 18:29:09,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27434 states. [2020-04-17 18:29:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27434 to 10334. [2020-04-17 18:29:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10334 states. [2020-04-17 18:29:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10334 states to 10334 states and 48087 transitions. [2020-04-17 18:29:10,122 INFO L78 Accepts]: Start accepts. Automaton has 10334 states and 48087 transitions. Word has length 23 [2020-04-17 18:29:10,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:10,123 INFO L479 AbstractCegarLoop]: Abstraction has 10334 states and 48087 transitions. [2020-04-17 18:29:10,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:29:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 10334 states and 48087 transitions. [2020-04-17 18:29:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:29:10,125 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:10,125 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:29:10,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:10,326 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 18:29:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:10,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2123174490, now seen corresponding path program 1 times [2020-04-17 18:29:10,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:10,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616225243] [2020-04-17 18:29:10,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:10,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616225243] [2020-04-17 18:29:10,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956698271] [2020-04-17 18:29:10,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:10,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:29:10,491 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:10,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:10,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2020-04-17 18:29:10,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841907819] [2020-04-17 18:29:10,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:29:10,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:29:10,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:29:10,628 INFO L87 Difference]: Start difference. First operand 10334 states and 48087 transitions. Second operand 22 states. [2020-04-17 18:29:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:12,290 INFO L93 Difference]: Finished difference Result 27678 states and 112557 transitions. [2020-04-17 18:29:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 18:29:12,291 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2020-04-17 18:29:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:12,367 INFO L225 Difference]: With dead ends: 27678 [2020-04-17 18:29:12,367 INFO L226 Difference]: Without dead ends: 27648 [2020-04-17 18:29:12,367 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=510, Invalid=1746, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 18:29:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27648 states. [2020-04-17 18:29:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27648 to 10519. [2020-04-17 18:29:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10519 states. [2020-04-17 18:29:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10519 states to 10519 states and 48808 transitions. [2020-04-17 18:29:12,845 INFO L78 Accepts]: Start accepts. Automaton has 10519 states and 48808 transitions. Word has length 23 [2020-04-17 18:29:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:12,845 INFO L479 AbstractCegarLoop]: Abstraction has 10519 states and 48808 transitions. [2020-04-17 18:29:12,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:29:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 10519 states and 48808 transitions. [2020-04-17 18:29:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:29:12,848 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:12,848 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:29:13,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:13,049 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 18:29:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:13,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1821264969, now seen corresponding path program 2 times [2020-04-17 18:29:13,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:13,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636098764] [2020-04-17 18:29:13,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:13,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636098764] [2020-04-17 18:29:13,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232280677] [2020-04-17 18:29:13,145 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:13,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:29:13,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:29:13,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:29:13,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 18:29:13,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:13,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2020-04-17 18:29:13,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871585681] [2020-04-17 18:29:13,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:29:13,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:13,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:29:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:29:13,319 INFO L87 Difference]: Start difference. First operand 10519 states and 48808 transitions. Second operand 20 states. [2020-04-17 18:29:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:14,548 INFO L93 Difference]: Finished difference Result 28219 states and 115749 transitions. [2020-04-17 18:29:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:29:14,549 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:29:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:14,614 INFO L225 Difference]: With dead ends: 28219 [2020-04-17 18:29:14,614 INFO L226 Difference]: Without dead ends: 28182 [2020-04-17 18:29:14,615 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:29:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28182 states. [2020-04-17 18:29:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28182 to 10495. [2020-04-17 18:29:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10495 states. [2020-04-17 18:29:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10495 states to 10495 states and 48707 transitions. [2020-04-17 18:29:15,060 INFO L78 Accepts]: Start accepts. Automaton has 10495 states and 48707 transitions. Word has length 23 [2020-04-17 18:29:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:15,060 INFO L479 AbstractCegarLoop]: Abstraction has 10495 states and 48707 transitions. [2020-04-17 18:29:15,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:29:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 10495 states and 48707 transitions. [2020-04-17 18:29:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:29:15,063 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:15,063 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:29:15,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:15,264 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 18:29:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:15,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1821234682, now seen corresponding path program 2 times [2020-04-17 18:29:15,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:15,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256518449] [2020-04-17 18:29:15,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:15,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256518449] [2020-04-17 18:29:15,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825197665] [2020-04-17 18:29:15,703 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:15,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:29:15,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:29:15,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:29:15,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 18:29:15,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:15,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2020-04-17 18:29:15,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111378596] [2020-04-17 18:29:15,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:29:15,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:15,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:29:15,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:29:15,874 INFO L87 Difference]: Start difference. First operand 10495 states and 48707 transitions. Second operand 20 states. [2020-04-17 18:29:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:17,098 INFO L93 Difference]: Finished difference Result 30803 states and 128260 transitions. [2020-04-17 18:29:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:29:17,099 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:29:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:17,179 INFO L225 Difference]: With dead ends: 30803 [2020-04-17 18:29:17,179 INFO L226 Difference]: Without dead ends: 30766 [2020-04-17 18:29:17,180 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:29:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30766 states. [2020-04-17 18:29:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30766 to 10348. [2020-04-17 18:29:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10348 states. [2020-04-17 18:29:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10348 states to 10348 states and 48028 transitions. [2020-04-17 18:29:17,662 INFO L78 Accepts]: Start accepts. Automaton has 10348 states and 48028 transitions. Word has length 23 [2020-04-17 18:29:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:17,662 INFO L479 AbstractCegarLoop]: Abstraction has 10348 states and 48028 transitions. [2020-04-17 18:29:17,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:29:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 10348 states and 48028 transitions. [2020-04-17 18:29:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:29:17,665 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:17,666 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:29:17,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:17,867 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 18:29:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:17,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1821243238, now seen corresponding path program 2 times [2020-04-17 18:29:17,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:17,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323912488] [2020-04-17 18:29:17,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:17,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323912488] [2020-04-17 18:29:17,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143508849] [2020-04-17 18:29:17,963 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:18,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:29:18,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:29:18,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:29:18,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 18:29:18,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:18,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2020-04-17 18:29:18,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782736169] [2020-04-17 18:29:18,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:29:18,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:29:18,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:29:18,157 INFO L87 Difference]: Start difference. First operand 10348 states and 48028 transitions. Second operand 20 states. [2020-04-17 18:29:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:19,171 INFO L93 Difference]: Finished difference Result 22369 states and 92565 transitions. [2020-04-17 18:29:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:29:19,171 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 18:29:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:19,227 INFO L225 Difference]: With dead ends: 22369 [2020-04-17 18:29:19,227 INFO L226 Difference]: Without dead ends: 22332 [2020-04-17 18:29:19,228 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:29:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22332 states. [2020-04-17 18:29:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22332 to 10518. [2020-04-17 18:29:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10518 states. [2020-04-17 18:29:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10518 states to 10518 states and 48785 transitions. [2020-04-17 18:29:19,628 INFO L78 Accepts]: Start accepts. Automaton has 10518 states and 48785 transitions. Word has length 23 [2020-04-17 18:29:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:19,628 INFO L479 AbstractCegarLoop]: Abstraction has 10518 states and 48785 transitions. [2020-04-17 18:29:19,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:29:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10518 states and 48785 transitions. [2020-04-17 18:29:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:29:19,632 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:19,632 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 18:29:19,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:19,833 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 18:29:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:19,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1336326282, now seen corresponding path program 1 times [2020-04-17 18:29:19,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:19,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226991705] [2020-04-17 18:29:19,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:29:19,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226991705] [2020-04-17 18:29:19,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553103277] [2020-04-17 18:29:19,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:20,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:29:20,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:20,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:20,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2020-04-17 18:29:20,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398937279] [2020-04-17 18:29:20,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:29:20,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:20,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:29:20,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:29:20,185 INFO L87 Difference]: Start difference. First operand 10518 states and 48785 transitions. Second operand 25 states. [2020-04-17 18:29:21,576 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2020-04-17 18:29:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:27,207 INFO L93 Difference]: Finished difference Result 48069 states and 178661 transitions. [2020-04-17 18:29:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-04-17 18:29:27,207 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2020-04-17 18:29:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:27,323 INFO L225 Difference]: With dead ends: 48069 [2020-04-17 18:29:27,323 INFO L226 Difference]: Without dead ends: 48009 [2020-04-17 18:29:27,325 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9459 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3695, Invalid=21427, Unknown=0, NotChecked=0, Total=25122 [2020-04-17 18:29:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48009 states. [2020-04-17 18:29:28,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48009 to 10696. [2020-04-17 18:29:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10696 states. [2020-04-17 18:29:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10696 states to 10696 states and 49659 transitions. [2020-04-17 18:29:28,041 INFO L78 Accepts]: Start accepts. Automaton has 10696 states and 49659 transitions. Word has length 25 [2020-04-17 18:29:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:28,041 INFO L479 AbstractCegarLoop]: Abstraction has 10696 states and 49659 transitions. [2020-04-17 18:29:28,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:29:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 10696 states and 49659 transitions. [2020-04-17 18:29:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:29:28,045 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:28,045 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 18:29:28,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:28,245 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 18:29:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:28,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1376528103, now seen corresponding path program 1 times [2020-04-17 18:29:28,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:28,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292562339] [2020-04-17 18:29:28,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-04-17 18:29:28,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292562339] [2020-04-17 18:29:28,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862057568] [2020-04-17 18:29:28,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:28,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:29:28,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:28,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:28,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2020-04-17 18:29:28,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154408245] [2020-04-17 18:29:28,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:29:28,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:28,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:29:28,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:29:28,921 INFO L87 Difference]: Start difference. First operand 10696 states and 49659 transitions. Second operand 24 states. [2020-04-17 18:29:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:34,698 INFO L93 Difference]: Finished difference Result 47545 states and 177328 transitions. [2020-04-17 18:29:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-04-17 18:29:34,699 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2020-04-17 18:29:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:34,825 INFO L225 Difference]: With dead ends: 47545 [2020-04-17 18:29:34,825 INFO L226 Difference]: Without dead ends: 47492 [2020-04-17 18:29:34,828 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7402 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2937, Invalid=17085, Unknown=0, NotChecked=0, Total=20022 [2020-04-17 18:29:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47492 states. [2020-04-17 18:29:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47492 to 11019. [2020-04-17 18:29:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11019 states. [2020-04-17 18:29:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11019 states to 11019 states and 51222 transitions. [2020-04-17 18:29:35,592 INFO L78 Accepts]: Start accepts. Automaton has 11019 states and 51222 transitions. Word has length 25 [2020-04-17 18:29:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:35,593 INFO L479 AbstractCegarLoop]: Abstraction has 11019 states and 51222 transitions. [2020-04-17 18:29:35,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:29:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 11019 states and 51222 transitions. [2020-04-17 18:29:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:29:35,597 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:35,597 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 18:29:35,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:35,798 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 18:29:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:35,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1026000266, now seen corresponding path program 2 times [2020-04-17 18:29:35,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:35,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38442622] [2020-04-17 18:29:35,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:35,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38442622] [2020-04-17 18:29:35,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183387730] [2020-04-17 18:29:35,897 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:35,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:29:35,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:29:35,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:29:35,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:29:36,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:36,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2020-04-17 18:29:36,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341282494] [2020-04-17 18:29:36,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:29:36,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:29:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:29:36,371 INFO L87 Difference]: Start difference. First operand 11019 states and 51222 transitions. Second operand 25 states. [2020-04-17 18:29:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:45,211 INFO L93 Difference]: Finished difference Result 63804 states and 240433 transitions. [2020-04-17 18:29:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2020-04-17 18:29:45,211 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2020-04-17 18:29:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:45,760 INFO L225 Difference]: With dead ends: 63804 [2020-04-17 18:29:45,760 INFO L226 Difference]: Without dead ends: 63683 [2020-04-17 18:29:45,761 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12973 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5140, Invalid=28900, Unknown=0, NotChecked=0, Total=34040 [2020-04-17 18:29:46,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63683 states. [2020-04-17 18:29:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63683 to 10954. [2020-04-17 18:29:46,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10954 states. [2020-04-17 18:29:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10954 states to 10954 states and 50857 transitions. [2020-04-17 18:29:46,628 INFO L78 Accepts]: Start accepts. Automaton has 10954 states and 50857 transitions. Word has length 25 [2020-04-17 18:29:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:46,629 INFO L479 AbstractCegarLoop]: Abstraction has 10954 states and 50857 transitions. [2020-04-17 18:29:46,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:29:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 10954 states and 50857 transitions. [2020-04-17 18:29:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:29:46,633 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:46,633 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 18:29:46,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:46,834 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 18:29:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1025978535, now seen corresponding path program 2 times [2020-04-17 18:29:46,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:46,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663962128] [2020-04-17 18:29:46,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:46,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663962128] [2020-04-17 18:29:46,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193535243] [2020-04-17 18:29:46,958 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:47,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:29:47,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:29:47,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:29:47,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:29:47,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:47,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2020-04-17 18:29:47,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164108381] [2020-04-17 18:29:47,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:29:47,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:47,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:29:47,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:29:47,253 INFO L87 Difference]: Start difference. First operand 10954 states and 50857 transitions. Second operand 25 states. [2020-04-17 18:29:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:29:53,218 INFO L93 Difference]: Finished difference Result 42088 states and 159955 transitions. [2020-04-17 18:29:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-04-17 18:29:53,219 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2020-04-17 18:29:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:29:53,317 INFO L225 Difference]: With dead ends: 42088 [2020-04-17 18:29:53,317 INFO L226 Difference]: Without dead ends: 41948 [2020-04-17 18:29:53,319 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5981 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2901, Invalid=14391, Unknown=0, NotChecked=0, Total=17292 [2020-04-17 18:29:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41948 states. [2020-04-17 18:29:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41948 to 10235. [2020-04-17 18:29:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10235 states. [2020-04-17 18:29:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10235 states to 10235 states and 47143 transitions. [2020-04-17 18:29:54,891 INFO L78 Accepts]: Start accepts. Automaton has 10235 states and 47143 transitions. Word has length 25 [2020-04-17 18:29:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:29:54,891 INFO L479 AbstractCegarLoop]: Abstraction has 10235 states and 47143 transitions. [2020-04-17 18:29:54,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:29:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 10235 states and 47143 transitions. [2020-04-17 18:29:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:29:54,895 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:29:54,895 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 18:29:55,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:55,096 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 18:29:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:29:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1489882486, now seen corresponding path program 3 times [2020-04-17 18:29:55,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:29:55,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213982522] [2020-04-17 18:29:55,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:29:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:29:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:55,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213982522] [2020-04-17 18:29:55,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402708245] [2020-04-17 18:29:55,195 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:29:55,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:29:55,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:29:55,281 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:29:55,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:29:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:29:55,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:29:55,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2020-04-17 18:29:55,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82562630] [2020-04-17 18:29:55,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:29:55,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:29:55,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:29:55,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:29:55,440 INFO L87 Difference]: Start difference. First operand 10235 states and 47143 transitions. Second operand 25 states. [2020-04-17 18:30:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:30:01,588 INFO L93 Difference]: Finished difference Result 49498 states and 181558 transitions. [2020-04-17 18:30:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-04-17 18:30:01,588 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2020-04-17 18:30:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:30:01,705 INFO L225 Difference]: With dead ends: 49498 [2020-04-17 18:30:01,705 INFO L226 Difference]: Without dead ends: 49459 [2020-04-17 18:30:01,707 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10217 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4219, Invalid=22841, Unknown=0, NotChecked=0, Total=27060 [2020-04-17 18:30:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49459 states. [2020-04-17 18:30:02,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49459 to 10476. [2020-04-17 18:30:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10476 states. [2020-04-17 18:30:02,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10476 states to 10476 states and 48321 transitions. [2020-04-17 18:30:02,637 INFO L78 Accepts]: Start accepts. Automaton has 10476 states and 48321 transitions. Word has length 25 [2020-04-17 18:30:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:30:02,637 INFO L479 AbstractCegarLoop]: Abstraction has 10476 states and 48321 transitions. [2020-04-17 18:30:02,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:30:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 10476 states and 48321 transitions. [2020-04-17 18:30:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:30:02,641 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:30:02,641 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 18:30:02,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:30:02,842 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 18:30:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:30:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash -110084214, now seen corresponding path program 1 times [2020-04-17 18:30:02,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:30:02,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313827412] [2020-04-17 18:30:02,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:30:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:30:02,918 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 18:30:02,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313827412] [2020-04-17 18:30:02,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929432977] [2020-04-17 18:30:02,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:30:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:30:03,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:30:03,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:30:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:30:03,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:30:03,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2020-04-17 18:30:03,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269872162] [2020-04-17 18:30:03,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:30:03,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:30:03,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:30:03,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:30:03,156 INFO L87 Difference]: Start difference. First operand 10476 states and 48321 transitions. Second operand 24 states. [2020-04-17 18:30:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:30:08,672 INFO L93 Difference]: Finished difference Result 48353 states and 179334 transitions. [2020-04-17 18:30:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-04-17 18:30:08,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2020-04-17 18:30:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:30:08,786 INFO L225 Difference]: With dead ends: 48353 [2020-04-17 18:30:08,786 INFO L226 Difference]: Without dead ends: 48296 [2020-04-17 18:30:08,787 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7089 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2971, Invalid=15935, Unknown=0, NotChecked=0, Total=18906 [2020-04-17 18:30:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48296 states. [2020-04-17 18:30:09,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48296 to 10870. [2020-04-17 18:30:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10870 states. [2020-04-17 18:30:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10870 states to 10870 states and 50194 transitions. [2020-04-17 18:30:09,484 INFO L78 Accepts]: Start accepts. Automaton has 10870 states and 50194 transitions. Word has length 25 [2020-04-17 18:30:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:30:09,484 INFO L479 AbstractCegarLoop]: Abstraction has 10870 states and 50194 transitions. [2020-04-17 18:30:09,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:30:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10870 states and 50194 transitions. [2020-04-17 18:30:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:30:09,488 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:30:09,488 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 18:30:09,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:30:09,689 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 18:30:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:30:09,690 INFO L82 PathProgramCache]: Analyzing trace with hash 240473910, now seen corresponding path program 4 times [2020-04-17 18:30:09,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:30:09,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944750419] [2020-04-17 18:30:09,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:30:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:30:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:30:09,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944750419] [2020-04-17 18:30:09,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115434035] [2020-04-17 18:30:09,785 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:30:09,866 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:30:09,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:30:09,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:30:09,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:30:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:30:10,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:30:10,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2020-04-17 18:30:10,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271215808] [2020-04-17 18:30:10,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 18:30:10,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:30:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 18:30:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:30:10,036 INFO L87 Difference]: Start difference. First operand 10870 states and 50194 transitions. Second operand 26 states. Received shutdown request... [2020-04-17 18:30:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-04-17 18:30:14,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:30:14,080 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 18:30:14,084 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 18:30:14,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:30:14 BasicIcfg [2020-04-17 18:30:14,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:30:14,086 INFO L168 Benchmark]: Toolchain (without parser) took 249265.60 ms. Allocated memory was 145.2 MB in the beginning and 2.4 GB in the end (delta: 2.3 GB). Free memory was 100.9 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 656.6 MB. Max. memory is 7.1 GB. [2020-04-17 18:30:14,086 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.2 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-17 18:30:14,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 719.50 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 99.1 MB in the beginning and 161.9 MB in the end (delta: -62.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-04-17 18:30:14,087 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.42 ms. Allocated memory is still 202.9 MB. Free memory was 161.9 MB in the beginning and 159.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:30:14,087 INFO L168 Benchmark]: Boogie Preprocessor took 25.64 ms. Allocated memory is still 202.9 MB. Free memory was 159.9 MB in the beginning and 158.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-17 18:30:14,087 INFO L168 Benchmark]: RCFGBuilder took 440.52 ms. Allocated memory is still 202.9 MB. Free memory was 158.5 MB in the beginning and 138.3 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-04-17 18:30:14,088 INFO L168 Benchmark]: TraceAbstraction took 248007.81 ms. Allocated memory was 202.9 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 137.6 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 635.6 MB. Max. memory is 7.1 GB. [2020-04-17 18:30:14,089 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.2 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 719.50 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 99.1 MB in the beginning and 161.9 MB in the end (delta: -62.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 48.42 ms. Allocated memory is still 202.9 MB. Free memory was 161.9 MB in the beginning and 159.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.64 ms. Allocated memory is still 202.9 MB. Free memory was 159.9 MB in the beginning and 158.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 440.52 ms. Allocated memory is still 202.9 MB. Free memory was 158.5 MB in the beginning and 138.3 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248007.81 ms. Allocated memory was 202.9 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 137.6 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 635.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.2s, 64 ProgramPointsBefore, 18 ProgramPointsAfterwards, 61 TransitionsBefore, 12 TransitionsAfterwards, 692 CoEnabledTransitionPairs, 7 FixpointIterations, 26 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 378 VarBasedMoverChecksPositive, 2 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 3 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 529 CheckedPairsTotal, 58 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.6s, 85 ProgramPointsBefore, 31 ProgramPointsAfterwards, 79 TransitionsBefore, 21 TransitionsAfterwards, 1108 CoEnabledTransitionPairs, 7 FixpointIterations, 31 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 594 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 15 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1275 CheckedPairsTotal, 68 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.1s, 106 ProgramPointsBefore, 41 ProgramPointsAfterwards, 97 TransitionsBefore, 27 TransitionsAfterwards, 1608 CoEnabledTransitionPairs, 7 FixpointIterations, 47 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 833 VarBasedMoverChecksPositive, 18 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 21 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 1856 CheckedPairsTotal, 89 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.1s, 127 ProgramPointsBefore, 51 ProgramPointsAfterwards, 115 TransitionsBefore, 33 TransitionsAfterwards, 2192 CoEnabledTransitionPairs, 7 FixpointIterations, 54 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 3 ConcurrentYvCompositions, 6 ChoiceCompositions, 1087 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 21 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 2531 CheckedPairsTotal, 101 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.2s, 148 ProgramPointsBefore, 61 ProgramPointsAfterwards, 133 TransitionsBefore, 39 TransitionsAfterwards, 2860 CoEnabledTransitionPairs, 6 FixpointIterations, 62 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 4 ConcurrentYvCompositions, 7 ChoiceCompositions, 1392 VarBasedMoverChecksPositive, 24 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 26 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 3247 CheckedPairsTotal, 119 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 679]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 679). Cancelled while BasicCegarLoop was constructing difference of abstraction (10870states) and FLOYD_HOARE automaton (currently 94 states, 26 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 114 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 58 locations, 1 error locations. Started 5 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 247.7s, OverallIterations: 73, TraceHistogramMax: 5, AutomataDifference: 182.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.9s, HoareTripleCheckerStatistics: 3445 SDtfs, 30763 SDslu, 31113 SDs, 0 SdLazy, 86925 SolverSat, 4941 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5647 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 5049 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247092 ImplicationChecksByTransitivity, 99.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11019occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 22.2s AutomataMinimizationTime, 68 MinimizatonAttempts, 971693 StatesRemovedByMinimization, 62 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 2454 NumberOfCodeBlocks, 2454 NumberOfCodeBlocksAsserted, 177 NumberOfCheckSat, 2264 ConstructedInterpolants, 0 QuantifiedInterpolants, 250844 SizeOfPredicates, 329 NumberOfNonLiveVariables, 6845 ConjunctsInSsa, 615 ConjunctsInUnsatCore, 128 InterpolantComputations, 10 PerfectInterpolantSequences, 312/1100 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