/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/pthread-atomic/gcd-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 22:58:24,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 22:58:24,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 22:58:24,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 22:58:24,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 22:58:24,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 22:58:24,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 22:58:24,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 22:58:25,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 22:58:25,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 22:58:25,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 22:58:25,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 22:58:25,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 22:58:25,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 22:58:25,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 22:58:25,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 22:58:25,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 22:58:25,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 22:58:25,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 22:58:25,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 22:58:25,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 22:58:25,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 22:58:25,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 22:58:25,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 22:58:25,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 22:58:25,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 22:58:25,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 22:58:25,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 22:58:25,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 22:58:25,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 22:58:25,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 22:58:25,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 22:58:25,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 22:58:25,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 22:58:25,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 22:58:25,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 22:58:25,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 22:58:25,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 22:58:25,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 22:58:25,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 22:58:25,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 22:58:25,090 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 22:58:25,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 22:58:25,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 22:58:25,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 22:58:25,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 22:58:25,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 22:58:25,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 22:58:25,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 22:58:25,092 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 22:58:25,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 22:58:25,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 22:58:25,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 22:58:25,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 22:58:25,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 22:58:25,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 22:58:25,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 22:58:25,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 22:58:25,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 22:58:25,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 22:58:25,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 22:58:25,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 22:58:25,094 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 22:58:25,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 22:58:25,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 22:58:25,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 22:58:25,500 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 22:58:25,501 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 22:58:25,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/gcd-2.i [2021-01-06 22:58:25,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/231a258dc/88af2459785a496c917eafc3eddadfc2/FLAGc8da251c9 [2021-01-06 22:58:26,431 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 22:58:26,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread-atomic/gcd-2.i [2021-01-06 22:58:26,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/231a258dc/88af2459785a496c917eafc3eddadfc2/FLAGc8da251c9 [2021-01-06 22:58:26,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/231a258dc/88af2459785a496c917eafc3eddadfc2 [2021-01-06 22:58:26,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 22:58:26,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 22:58:26,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 22:58:26,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 22:58:26,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 22:58:26,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:58:26" (1/1) ... [2021-01-06 22:58:26,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@458aac06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:26, skipping insertion in model container [2021-01-06 22:58:26,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:58:26" (1/1) ... [2021-01-06 22:58:26,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 22:58:26,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 22:58:27,152 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread-atomic/gcd-2.i[938,951] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] [2021-01-06 22:58:27,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:58:27,371 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 22:58:27,396 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread-atomic/gcd-2.i[938,951] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] [2021-01-06 22:58:27,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:58:27,569 INFO L208 MainTranslator]: Completed translation [2021-01-06 22:58:27,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27 WrapperNode [2021-01-06 22:58:27,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 22:58:27,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 22:58:27,571 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 22:58:27,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 22:58:27,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (1/1) ... [2021-01-06 22:58:27,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (1/1) ... [2021-01-06 22:58:27,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 22:58:27,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 22:58:27,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 22:58:27,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 22:58:27,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (1/1) ... [2021-01-06 22:58:27,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (1/1) ... [2021-01-06 22:58:27,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (1/1) ... [2021-01-06 22:58:27,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (1/1) ... [2021-01-06 22:58:27,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (1/1) ... [2021-01-06 22:58:27,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (1/1) ... [2021-01-06 22:58:27,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (1/1) ... [2021-01-06 22:58:27,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 22:58:27,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 22:58:27,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 22:58:27,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 22:58:27,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 22:58:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 22:58:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 22:58:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 22:58:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure dec_a [2021-01-06 22:58:27,822 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_a [2021-01-06 22:58:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure dec_b [2021-01-06 22:58:27,822 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_b [2021-01-06 22:58:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 22:58:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 22:58:27,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 22:58:27,825 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-06 22:58:28,496 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 22:58:28,496 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-01-06 22:58:28,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:58:28 BoogieIcfgContainer [2021-01-06 22:58:28,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 22:58:28,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 22:58:28,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 22:58:28,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 22:58:28,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:58:26" (1/3) ... [2021-01-06 22:58:28,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22cd833f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:58:28, skipping insertion in model container [2021-01-06 22:58:28,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:27" (2/3) ... [2021-01-06 22:58:28,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22cd833f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:58:28, skipping insertion in model container [2021-01-06 22:58:28,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:58:28" (3/3) ... [2021-01-06 22:58:28,514 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd-2.i [2021-01-06 22:58:28,522 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-06 22:58:28,522 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 22:58:28,528 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 22:58:28,529 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-06 22:58:28,582 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,582 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,583 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,583 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,583 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,583 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,583 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,583 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,588 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,589 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,589 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,589 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,591 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,591 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,592 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,592 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,592 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,592 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,592 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,593 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,593 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,594 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,594 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,594 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,597 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,598 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,598 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,598 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,601 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,602 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,603 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,603 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:28,614 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-01-06 22:58:28,639 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-01-06 22:58:28,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 22:58:28,679 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 22:58:28,679 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 22:58:28,679 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 22:58:28,679 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 22:58:28,680 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 22:58:28,681 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 22:58:28,681 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 22:58:28,703 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-01-06 22:58:28,705 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 125 transitions, 272 flow [2021-01-06 22:58:28,711 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 125 transitions, 272 flow [2021-01-06 22:58:28,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 118 places, 125 transitions, 272 flow [2021-01-06 22:58:28,828 INFO L129 PetriNetUnfolder]: 13/125 cut-off events. [2021-01-06 22:58:28,828 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-01-06 22:58:28,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 125 events. 13/125 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 71. Up to 3 conditions per place. [2021-01-06 22:58:28,835 INFO L116 LiptonReduction]: Number of co-enabled transitions 280 [2021-01-06 22:58:32,362 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-01-06 22:58:33,583 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-01-06 22:58:33,790 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-01-06 22:58:34,207 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2021-01-06 22:58:34,360 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-01-06 22:58:34,757 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 104 [2021-01-06 22:58:34,917 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-01-06 22:58:35,387 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-01-06 22:58:35,505 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-01-06 22:58:35,703 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-01-06 22:58:35,833 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-01-06 22:58:42,460 WARN L197 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-01-06 22:58:42,644 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-01-06 22:58:43,048 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-01-06 22:58:43,230 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-01-06 22:58:44,004 WARN L197 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-01-06 22:58:46,351 WARN L197 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 95 [2021-01-06 22:58:46,547 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-01-06 22:58:46,748 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-01-06 22:58:47,408 WARN L197 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-01-06 22:58:47,655 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-01-06 22:58:47,662 INFO L131 LiptonReduction]: Checked pairs total: 1185 [2021-01-06 22:58:47,663 INFO L133 LiptonReduction]: Total number of compositions: 134 [2021-01-06 22:58:47,671 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 26 transitions, 74 flow [2021-01-06 22:58:47,682 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 72 states. [2021-01-06 22:58:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2021-01-06 22:58:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:47,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:47,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:47,693 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:47,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1272837909, now seen corresponding path program 1 times [2021-01-06 22:58:47,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:47,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297922430] [2021-01-06 22:58:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:47,857 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 22:58:47,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19969981] [2021-01-06 22:58:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:47,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 22:58:47,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:48,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297922430] [2021-01-06 22:58:48,126 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 22:58:48,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19969981] [2021-01-06 22:58:48,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:48,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 22:58:48,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402421790] [2021-01-06 22:58:48,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 22:58:48,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:48,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 22:58:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 22:58:48,153 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 4 states. [2021-01-06 22:58:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:48,369 INFO L93 Difference]: Finished difference Result 135 states and 282 transitions. [2021-01-06 22:58:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 22:58:48,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-01-06 22:58:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:48,384 INFO L225 Difference]: With dead ends: 135 [2021-01-06 22:58:48,384 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 22:58:48,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:58:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 22:58:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-01-06 22:58:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 22:58:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-01-06 22:58:48,439 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 15 [2021-01-06 22:58:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:48,439 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-01-06 22:58:48,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 22:58:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-01-06 22:58:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:48,441 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:48,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:48,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 22:58:48,655 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash 180456841, now seen corresponding path program 1 times [2021-01-06 22:58:48,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:48,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718595744] [2021-01-06 22:58:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:48,700 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 22:58:48,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503097951] [2021-01-06 22:58:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:48,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 22:58:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:48,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718595744] [2021-01-06 22:58:48,927 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 22:58:48,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503097951] [2021-01-06 22:58:48,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:48,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 22:58:48,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493593659] [2021-01-06 22:58:48,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 22:58:48,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:48,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 22:58:48,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 22:58:48,931 INFO L87 Difference]: Start difference. First operand 89 states and 195 transitions. Second operand 4 states. [2021-01-06 22:58:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:49,085 INFO L93 Difference]: Finished difference Result 139 states and 304 transitions. [2021-01-06 22:58:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 22:58:49,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-01-06 22:58:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:49,091 INFO L225 Difference]: With dead ends: 139 [2021-01-06 22:58:49,092 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 22:58:49,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:58:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 22:58:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 127. [2021-01-06 22:58:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 22:58:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 281 transitions. [2021-01-06 22:58:49,113 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 281 transitions. Word has length 17 [2021-01-06 22:58:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:49,113 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 281 transitions. [2021-01-06 22:58:49,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 22:58:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 281 transitions. [2021-01-06 22:58:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:49,116 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:49,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:49,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:49,326 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:49,327 INFO L82 PathProgramCache]: Analyzing trace with hash 180456838, now seen corresponding path program 1 times [2021-01-06 22:58:49,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:49,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786533272] [2021-01-06 22:58:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:49,396 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 22:58:49,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820884759] [2021-01-06 22:58:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:49,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 22:58:49,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:49,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786533272] [2021-01-06 22:58:49,979 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 22:58:49,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820884759] [2021-01-06 22:58:49,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 22:58:49,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 22:58:49,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325013666] [2021-01-06 22:58:49,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:58:49,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:49,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:58:49,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:58:49,983 INFO L87 Difference]: Start difference. First operand 127 states and 281 transitions. Second operand 6 states. [2021-01-06 22:58:50,238 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-01-06 22:58:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:57,406 INFO L93 Difference]: Finished difference Result 277 states and 590 transitions. [2021-01-06 22:58:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 22:58:57,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 22:58:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:57,417 INFO L225 Difference]: With dead ends: 277 [2021-01-06 22:58:57,417 INFO L226 Difference]: Without dead ends: 277 [2021-01-06 22:58:57,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:58:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-01-06 22:58:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 251. [2021-01-06 22:58:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2021-01-06 22:58:57,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 551 transitions. [2021-01-06 22:58:57,457 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 551 transitions. Word has length 17 [2021-01-06 22:58:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:57,457 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 551 transitions. [2021-01-06 22:58:57,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:58:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 551 transitions. [2021-01-06 22:58:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:57,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:57,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:57,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:57,668 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash 180456839, now seen corresponding path program 1 times [2021-01-06 22:58:57,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:57,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011480060] [2021-01-06 22:58:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:57,702 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 22:58:57,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594177449] [2021-01-06 22:58:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:57,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 22:58:57,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:57,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011480060] [2021-01-06 22:58:57,958 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 22:58:57,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594177449] [2021-01-06 22:58:57,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:57,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 22:58:57,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329463153] [2021-01-06 22:58:57,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 22:58:57,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:57,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 22:58:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 22:58:57,971 INFO L87 Difference]: Start difference. First operand 251 states and 551 transitions. Second operand 4 states. [2021-01-06 22:58:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:58,107 INFO L93 Difference]: Finished difference Result 262 states and 550 transitions. [2021-01-06 22:58:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 22:58:58,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-01-06 22:58:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:58,114 INFO L225 Difference]: With dead ends: 262 [2021-01-06 22:58:58,115 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 22:58:58,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:58:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 22:58:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2021-01-06 22:58:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-01-06 22:58:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 481 transitions. [2021-01-06 22:58:58,130 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 481 transitions. Word has length 17 [2021-01-06 22:58:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:58,131 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 481 transitions. [2021-01-06 22:58:58,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 22:58:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 481 transitions. [2021-01-06 22:58:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:58,133 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:58,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:58,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:58,342 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:58,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:58,343 INFO L82 PathProgramCache]: Analyzing trace with hash 643432827, now seen corresponding path program 1 times [2021-01-06 22:58:58,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:58,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807325384] [2021-01-06 22:58:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:58,368 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 22:58:58,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974119667] [2021-01-06 22:58:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:58,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 22:58:58,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:58,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807325384] [2021-01-06 22:58:58,873 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 22:58:58,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974119667] [2021-01-06 22:58:58,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 22:58:58,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2021-01-06 22:58:58,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062244377] [2021-01-06 22:58:58,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:58:58,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:58,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:58:58,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:58:58,875 INFO L87 Difference]: Start difference. First operand 224 states and 481 transitions. Second operand 5 states. [2021-01-06 22:58:59,133 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-01-06 22:59:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:01,413 INFO L93 Difference]: Finished difference Result 283 states and 589 transitions. [2021-01-06 22:59:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 22:59:01,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 22:59:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:01,418 INFO L225 Difference]: With dead ends: 283 [2021-01-06 22:59:01,418 INFO L226 Difference]: Without dead ends: 238 [2021-01-06 22:59:01,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:59:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-01-06 22:59:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2021-01-06 22:59:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2021-01-06 22:59:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 496 transitions. [2021-01-06 22:59:01,432 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 496 transitions. Word has length 17 [2021-01-06 22:59:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:01,432 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 496 transitions. [2021-01-06 22:59:01,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:59:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 496 transitions. [2021-01-06 22:59:01,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:59:01,434 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:01,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:01,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:01,643 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:01,644 INFO L82 PathProgramCache]: Analyzing trace with hash 932340388, now seen corresponding path program 2 times [2021-01-06 22:59:01,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:01,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128389486] [2021-01-06 22:59:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:01,667 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 22:59:01,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703024376] [2021-01-06 22:59:01,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:03,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:03,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 22:59:03,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:03,567 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:03,568 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:03,575 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:03,580 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 2, 1] term [2021-01-06 22:59:03,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:59:04,249 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-01-06 22:59:04,697 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 24 [2021-01-06 22:59:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:04,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128389486] [2021-01-06 22:59:04,741 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 22:59:04,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703024376] [2021-01-06 22:59:04,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 22:59:04,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 22:59:04,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988108923] [2021-01-06 22:59:04,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 22:59:04,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 22:59:04,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:59:04,744 INFO L87 Difference]: Start difference. First operand 230 states and 496 transitions. Second operand 8 states. [2021-01-06 22:59:05,300 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 25 [2021-01-06 22:59:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:05,865 INFO L93 Difference]: Finished difference Result 287 states and 613 transitions. [2021-01-06 22:59:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:59:05,867 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2021-01-06 22:59:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:05,869 INFO L225 Difference]: With dead ends: 287 [2021-01-06 22:59:05,870 INFO L226 Difference]: Without dead ends: 250 [2021-01-06 22:59:05,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:59:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-01-06 22:59:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2021-01-06 22:59:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2021-01-06 22:59:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 534 transitions. [2021-01-06 22:59:05,880 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 534 transitions. Word has length 19 [2021-01-06 22:59:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:05,881 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 534 transitions. [2021-01-06 22:59:05,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 22:59:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 534 transitions. [2021-01-06 22:59:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:59:05,884 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:05,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:06,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:06,090 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:06,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1395316379, now seen corresponding path program 1 times [2021-01-06 22:59:06,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:06,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416681204] [2021-01-06 22:59:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:06,148 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 22:59:06,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584650123] [2021-01-06 22:59:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:08,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 22:59:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:08,933 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-01-06 22:59:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:08,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416681204] [2021-01-06 22:59:08,952 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 22:59:08,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584650123] [2021-01-06 22:59:08,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 22:59:08,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 22:59:08,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003766140] [2021-01-06 22:59:08,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 22:59:08,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:08,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 22:59:08,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:59:08,954 INFO L87 Difference]: Start difference. First operand 246 states and 534 transitions. Second operand 7 states. [2021-01-06 22:59:09,247 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-01-06 22:59:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:09,990 INFO L93 Difference]: Finished difference Result 286 states and 613 transitions. [2021-01-06 22:59:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:59:09,993 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-01-06 22:59:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:09,996 INFO L225 Difference]: With dead ends: 286 [2021-01-06 22:59:09,996 INFO L226 Difference]: Without dead ends: 256 [2021-01-06 22:59:09,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:59:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-01-06 22:59:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 254. [2021-01-06 22:59:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2021-01-06 22:59:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 554 transitions. [2021-01-06 22:59:10,007 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 554 transitions. Word has length 19 [2021-01-06 22:59:10,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:10,007 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 554 transitions. [2021-01-06 22:59:10,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 22:59:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 554 transitions. [2021-01-06 22:59:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:59:10,008 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:10,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:10,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:10,215 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:10,216 INFO L82 PathProgramCache]: Analyzing trace with hash -68152621, now seen corresponding path program 2 times [2021-01-06 22:59:10,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:10,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507039789] [2021-01-06 22:59:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:10,237 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 22:59:10,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354365112] [2021-01-06 22:59:10,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:13,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:13,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:13,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 22:59:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:13,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:13,659 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-01-06 22:59:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:13,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507039789] [2021-01-06 22:59:13,697 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 22:59:13,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354365112] [2021-01-06 22:59:13,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 22:59:13,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 22:59:13,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743939145] [2021-01-06 22:59:13,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:59:13,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:59:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:59:13,699 INFO L87 Difference]: Start difference. First operand 254 states and 554 transitions. Second operand 6 states. [2021-01-06 22:59:17,004 WARN L197 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-01-06 22:59:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:33,337 INFO L93 Difference]: Finished difference Result 406 states and 842 transitions. [2021-01-06 22:59:33,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:59:33,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 22:59:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:33,348 INFO L225 Difference]: With dead ends: 406 [2021-01-06 22:59:33,348 INFO L226 Difference]: Without dead ends: 406 [2021-01-06 22:59:33,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:59:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-01-06 22:59:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 344. [2021-01-06 22:59:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2021-01-06 22:59:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 755 transitions. [2021-01-06 22:59:33,362 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 755 transitions. Word has length 19 [2021-01-06 22:59:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:33,363 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 755 transitions. [2021-01-06 22:59:33,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:59:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 755 transitions. [2021-01-06 22:59:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:59:33,365 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:33,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:33,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 22:59:33,572 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash -68152624, now seen corresponding path program 1 times [2021-01-06 22:59:33,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:33,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598879043] [2021-01-06 22:59:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:33,605 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 22:59:33,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892178253] [2021-01-06 22:59:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:33,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 22:59:33,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:34,038 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:59:34,047 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:59:34,054 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 22:59:34,305 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 31 [2021-01-06 22:59:34,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:34,619 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 22:59:34,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598879043] [2021-01-06 22:59:34,642 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 22:59:34,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892178253] [2021-01-06 22:59:34,642 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 22:59:34,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:59:34,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 22:59:34,644 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 22:59:34,644 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 22:59:34,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:34,865 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:126) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:126) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportResult(TraceAbstractionStarter.java:558) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportUnproveableResult(TraceAbstractionStarter.java:536) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportResults(TraceAbstractionStarter.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:352) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-01-06 22:59:34,874 INFO L168 Benchmark]: Toolchain (without parser) took 68109.89 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 124.6 MB in the beginning and 154.1 MB in the end (delta: -29.5 MB). Peak memory consumption was 82.3 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:34,875 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 22:59:34,880 INFO L168 Benchmark]: CACSL2BoogieTranslator took 806.35 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 93.9 MB in the end (delta: 30.7 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:34,882 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.34 ms. Allocated memory is still 151.0 MB. Free memory was 93.9 MB in the beginning and 91.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:34,883 INFO L168 Benchmark]: Boogie Preprocessor took 61.15 ms. Allocated memory is still 151.0 MB. Free memory was 91.4 MB in the beginning and 90.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:34,885 INFO L168 Benchmark]: RCFGBuilder took 778.94 ms. Allocated memory is still 151.0 MB. Free memory was 90.0 MB in the beginning and 121.3 MB in the end (delta: -31.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:34,886 INFO L168 Benchmark]: TraceAbstraction took 66364.27 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 120.7 MB in the beginning and 154.1 MB in the end (delta: -33.4 MB). Peak memory consumption was 78.8 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:34,890 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 806.35 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 93.9 MB in the end (delta: 30.7 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 87.34 ms. Allocated memory is still 151.0 MB. Free memory was 93.9 MB in the beginning and 91.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.15 ms. Allocated memory is still 151.0 MB. Free memory was 91.4 MB in the beginning and 90.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 778.94 ms. Allocated memory is still 151.0 MB. Free memory was 90.0 MB in the beginning and 121.3 MB in the end (delta: -31.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 66364.27 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 120.7 MB in the beginning and 154.1 MB in the end (delta: -33.4 MB). Peak memory consumption was 78.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 183 VarBasedMoverChecksPositive, 6 VarBasedMoverChecksNegative, 4 SemBasedMoverChecksPositive, 2 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 61 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 18.9s, 118 PlacesBefore, 29 PlacesAfterwards, 125 TransitionsBefore, 26 TransitionsAfterwards, 280 CoEnabledTransitionPairs, 8 FixpointIterations, 89 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 27 TrivialYvCompositions, 4 ConcurrentYvCompositions, 10 ChoiceCompositions, 134 TotalNumberOfCompositions, 1185 MoverChecksTotal - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:126) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...