/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-ext/16_peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 17:10:01,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 17:10:01,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 17:10:01,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 17:10:01,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 17:10:01,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 17:10:01,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 17:10:01,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 17:10:01,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 17:10:01,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 17:10:01,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 17:10:01,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 17:10:01,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 17:10:01,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 17:10:01,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 17:10:01,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 17:10:01,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 17:10:01,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 17:10:01,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 17:10:01,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 17:10:01,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 17:10:01,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 17:10:01,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 17:10:01,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 17:10:01,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-15 17:10:01,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 17:10:01,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 17:10:01,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 17:10:01,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 17:10:01,762 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 17:10:01,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 17:10:01,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 17:10:01,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 17:10:01,764 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 17:10:01,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 17:10:01,764 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 17:10:01,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 17:10:01,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 17:10:01,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 17:10:01,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 17:10:01,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 17:10:01,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 17:10:01,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 17:10:01,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 17:10:01,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 17:10:01,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 17:10:01,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 17:10:01,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 17:10:01,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 17:10:01,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 17:10:01,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 17:10:01,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 17:10:01,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 17:10:01,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 17:10:01,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 17:10:01,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 17:10:01,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 17:10:01,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 17:10:01,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 17:10:02,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 17:10:02,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 17:10:02,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 17:10:02,059 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 17:10:02,059 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 17:10:02,060 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/16_peterson.i [2020-10-15 17:10:02,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23eaad49d/bcd4940ee26344f59c4e10b7a2983dbb/FLAGd51ff2178 [2020-10-15 17:10:02,630 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 17:10:02,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/16_peterson.i [2020-10-15 17:10:02,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23eaad49d/bcd4940ee26344f59c4e10b7a2983dbb/FLAGd51ff2178 [2020-10-15 17:10:02,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23eaad49d/bcd4940ee26344f59c4e10b7a2983dbb [2020-10-15 17:10:02,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 17:10:02,962 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 17:10:02,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 17:10:02,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 17:10:02,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 17:10:02,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:10:02" (1/1) ... [2020-10-15 17:10:02,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49fcd5eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:02, skipping insertion in model container [2020-10-15 17:10:02,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:10:02" (1/1) ... [2020-10-15 17:10:02,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 17:10:03,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 17:10:03,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 17:10:03,482 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 17:10:03,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 17:10:03,633 INFO L208 MainTranslator]: Completed translation [2020-10-15 17:10:03,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03 WrapperNode [2020-10-15 17:10:03,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 17:10:03,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 17:10:03,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 17:10:03,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 17:10:03,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (1/1) ... [2020-10-15 17:10:03,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (1/1) ... [2020-10-15 17:10:03,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 17:10:03,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 17:10:03,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 17:10:03,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 17:10:03,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (1/1) ... [2020-10-15 17:10:03,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (1/1) ... [2020-10-15 17:10:03,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (1/1) ... [2020-10-15 17:10:03,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (1/1) ... [2020-10-15 17:10:03,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (1/1) ... [2020-10-15 17:10:03,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (1/1) ... [2020-10-15 17:10:03,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (1/1) ... [2020-10-15 17:10:03,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 17:10:03,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 17:10:03,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 17:10:03,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 17:10:03,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 17:10:03,773 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-15 17:10:03,773 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-15 17:10:03,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 17:10:03,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 17:10:03,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 17:10:03,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 17:10:03,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 17:10:03,776 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 17:10:04,123 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 17:10:04,124 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-15 17:10:04,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:10:04 BoogieIcfgContainer [2020-10-15 17:10:04,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 17:10:04,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 17:10:04,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 17:10:04,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 17:10:04,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:10:02" (1/3) ... [2020-10-15 17:10:04,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20afb0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:10:04, skipping insertion in model container [2020-10-15 17:10:04,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:10:03" (2/3) ... [2020-10-15 17:10:04,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20afb0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:10:04, skipping insertion in model container [2020-10-15 17:10:04,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:10:04" (3/3) ... [2020-10-15 17:10:04,137 INFO L111 eAbstractionObserver]: Analyzing ICFG 16_peterson.i [2020-10-15 17:10:04,156 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 17:10:04,156 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 17:10:04,163 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-15 17:10:04,164 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 17:10:04,186 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 17:10:04,187 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 17:10:04,187 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 17:10:04,187 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 17:10:04,188 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 17:10:04,189 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 17:10:04,192 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 17:10:04,193 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 17:10:04,193 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 17:10:04,193 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 17:10:04,215 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-15 17:10:04,241 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 17:10:04,241 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 17:10:04,241 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 17:10:04,241 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 17:10:04,242 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 17:10:04,242 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 17:10:04,242 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 17:10:04,242 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 17:10:04,255 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 17:10:04,257 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 51 transitions, 107 flow [2020-10-15 17:10:04,259 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 51 transitions, 107 flow [2020-10-15 17:10:04,261 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 49 places, 51 transitions, 107 flow [2020-10-15 17:10:04,295 INFO L129 PetriNetUnfolder]: 6/50 cut-off events. [2020-10-15 17:10:04,295 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 17:10:04,300 INFO L80 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 50 events. 6/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2020-10-15 17:10:04,303 INFO L117 LiptonReduction]: Number of co-enabled transitions 672 [2020-10-15 17:10:05,180 INFO L132 LiptonReduction]: Checked pairs total: 1287 [2020-10-15 17:10:05,180 INFO L134 LiptonReduction]: Total number of compositions: 37 [2020-10-15 17:10:05,187 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 22 transitions, 49 flow [2020-10-15 17:10:05,199 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 66 states. [2020-10-15 17:10:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-15 17:10:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 17:10:05,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 17:10:05,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 17:10:05,210 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 17:10:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 17:10:05,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1942834628, now seen corresponding path program 1 times [2020-10-15 17:10:05,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 17:10:05,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222778462] [2020-10-15 17:10:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 17:10:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 17:10:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 17:10:05,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222778462] [2020-10-15 17:10:05,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 17:10:05,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 17:10:05,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833199612] [2020-10-15 17:10:05,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-15 17:10:05,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 17:10:05,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-15 17:10:05,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-15 17:10:05,423 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2020-10-15 17:10:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 17:10:05,443 INFO L93 Difference]: Finished difference Result 66 states and 130 transitions. [2020-10-15 17:10:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-15 17:10:05,445 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-15 17:10:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 17:10:05,457 INFO L225 Difference]: With dead ends: 66 [2020-10-15 17:10:05,457 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 17:10:05,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-15 17:10:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 17:10:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-15 17:10:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 17:10:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2020-10-15 17:10:05,501 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 6 [2020-10-15 17:10:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 17:10:05,502 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2020-10-15 17:10:05,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-15 17:10:05,502 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2020-10-15 17:10:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-15 17:10:05,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 17:10:05,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-15 17:10:05,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 17:10:05,504 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 17:10:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 17:10:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash 98318518, now seen corresponding path program 1 times [2020-10-15 17:10:05,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 17:10:05,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860223109] [2020-10-15 17:10:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 17:10:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 17:10:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 17:10:05,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860223109] [2020-10-15 17:10:05,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 17:10:05,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 17:10:05,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626904103] [2020-10-15 17:10:05,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 17:10:05,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 17:10:05,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 17:10:05,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 17:10:05,565 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand 3 states. [2020-10-15 17:10:05,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 17:10:05,594 INFO L93 Difference]: Finished difference Result 66 states and 121 transitions. [2020-10-15 17:10:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 17:10:05,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-10-15 17:10:05,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 17:10:05,596 INFO L225 Difference]: With dead ends: 66 [2020-10-15 17:10:05,596 INFO L226 Difference]: Without dead ends: 56 [2020-10-15 17:10:05,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 17:10:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-15 17:10:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-15 17:10:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 17:10:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2020-10-15 17:10:05,607 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 7 [2020-10-15 17:10:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 17:10:05,607 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2020-10-15 17:10:05,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 17:10:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2020-10-15 17:10:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-15 17:10:05,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 17:10:05,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-15 17:10:05,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 17:10:05,609 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 17:10:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 17:10:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash 114699826, now seen corresponding path program 1 times [2020-10-15 17:10:05,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 17:10:05,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946395233] [2020-10-15 17:10:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 17:10:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 17:10:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 17:10:05,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946395233] [2020-10-15 17:10:05,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 17:10:05,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 17:10:05,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957427504] [2020-10-15 17:10:05,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 17:10:05,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 17:10:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 17:10:05,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 17:10:05,649 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 3 states. [2020-10-15 17:10:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 17:10:05,665 INFO L93 Difference]: Finished difference Result 48 states and 85 transitions. [2020-10-15 17:10:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 17:10:05,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-10-15 17:10:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 17:10:05,667 INFO L225 Difference]: With dead ends: 48 [2020-10-15 17:10:05,667 INFO L226 Difference]: Without dead ends: 38 [2020-10-15 17:10:05,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 17:10:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-15 17:10:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-15 17:10:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 17:10:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 66 transitions. [2020-10-15 17:10:05,673 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 66 transitions. Word has length 7 [2020-10-15 17:10:05,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 17:10:05,673 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 66 transitions. [2020-10-15 17:10:05,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 17:10:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 66 transitions. [2020-10-15 17:10:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 17:10:05,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 17:10:05,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 17:10:05,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 17:10:05,675 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 17:10:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 17:10:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash -480213144, now seen corresponding path program 1 times [2020-10-15 17:10:05,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 17:10:05,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672556533] [2020-10-15 17:10:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 17:10:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 17:10:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 17:10:05,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672556533] [2020-10-15 17:10:05,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 17:10:05,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 17:10:05,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540662781] [2020-10-15 17:10:05,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 17:10:05,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 17:10:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 17:10:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 17:10:05,718 INFO L87 Difference]: Start difference. First operand 38 states and 66 transitions. Second operand 4 states. [2020-10-15 17:10:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 17:10:05,748 INFO L93 Difference]: Finished difference Result 43 states and 75 transitions. [2020-10-15 17:10:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 17:10:05,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-15 17:10:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 17:10:05,750 INFO L225 Difference]: With dead ends: 43 [2020-10-15 17:10:05,750 INFO L226 Difference]: Without dead ends: 34 [2020-10-15 17:10:05,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 17:10:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-15 17:10:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-15 17:10:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 17:10:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 53 transitions. [2020-10-15 17:10:05,755 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 53 transitions. Word has length 11 [2020-10-15 17:10:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 17:10:05,756 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 53 transitions. [2020-10-15 17:10:05,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 17:10:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 53 transitions. [2020-10-15 17:10:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 17:10:05,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 17:10:05,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 17:10:05,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 17:10:05,757 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 17:10:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 17:10:05,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1657399704, now seen corresponding path program 2 times [2020-10-15 17:10:05,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 17:10:05,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446370233] [2020-10-15 17:10:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 17:10:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 17:10:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 17:10:05,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446370233] [2020-10-15 17:10:05,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 17:10:05,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 17:10:05,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111942558] [2020-10-15 17:10:05,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 17:10:05,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 17:10:05,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 17:10:05,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 17:10:05,818 INFO L87 Difference]: Start difference. First operand 34 states and 53 transitions. Second operand 4 states. [2020-10-15 17:10:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 17:10:05,832 INFO L93 Difference]: Finished difference Result 17 states and 29 transitions. [2020-10-15 17:10:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 17:10:05,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-15 17:10:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 17:10:05,833 INFO L225 Difference]: With dead ends: 17 [2020-10-15 17:10:05,833 INFO L226 Difference]: Without dead ends: 0 [2020-10-15 17:10:05,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 17:10:05,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-15 17:10:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-15 17:10:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-15 17:10:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-15 17:10:05,835 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-10-15 17:10:05,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 17:10:05,836 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-15 17:10:05,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 17:10:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-15 17:10:05,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-15 17:10:05,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 17:10:05,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 05:10:05 BasicIcfg [2020-10-15 17:10:05,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 17:10:05,845 INFO L168 Benchmark]: Toolchain (without parser) took 2881.16 ms. Allocated memory was 251.1 MB in the beginning and 356.0 MB in the end (delta: 104.9 MB). Free memory was 206.3 MB in the beginning and 247.3 MB in the end (delta: -41.1 MB). Peak memory consumption was 63.8 MB. Max. memory is 14.2 GB. [2020-10-15 17:10:05,846 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 17:10:05,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 670.16 ms. Allocated memory was 251.1 MB in the beginning and 314.0 MB in the end (delta: 62.9 MB). Free memory was 206.3 MB in the beginning and 270.0 MB in the end (delta: -63.8 MB). Peak memory consumption was 26.6 MB. Max. memory is 14.2 GB. [2020-10-15 17:10:05,850 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.91 ms. Allocated memory is still 314.0 MB. Free memory was 270.0 MB in the beginning and 267.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 17:10:05,854 INFO L168 Benchmark]: Boogie Preprocessor took 27.93 ms. Allocated memory is still 314.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 17:10:05,856 INFO L168 Benchmark]: RCFGBuilder took 415.24 ms. Allocated memory is still 314.0 MB. Free memory was 267.5 MB in the beginning and 248.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-15 17:10:05,857 INFO L168 Benchmark]: TraceAbstraction took 1713.80 ms. Allocated memory was 314.0 MB in the beginning and 356.0 MB in the end (delta: 41.9 MB). Free memory was 248.2 MB in the beginning and 247.3 MB in the end (delta: 841.7 kB). Peak memory consumption was 42.8 MB. Max. memory is 14.2 GB. [2020-10-15 17:10:05,867 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 670.16 ms. Allocated memory was 251.1 MB in the beginning and 314.0 MB in the end (delta: 62.9 MB). Free memory was 206.3 MB in the beginning and 270.0 MB in the end (delta: -63.8 MB). Peak memory consumption was 26.6 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 47.91 ms. Allocated memory is still 314.0 MB. Free memory was 270.0 MB in the beginning and 267.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 27.93 ms. Allocated memory is still 314.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 415.24 ms. Allocated memory is still 314.0 MB. Free memory was 267.5 MB in the beginning and 248.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 1713.80 ms. Allocated memory was 314.0 MB in the beginning and 356.0 MB in the end (delta: 41.9 MB). Free memory was 248.2 MB in the beginning and 247.3 MB in the end (delta: 841.7 kB). Peak memory consumption was 42.8 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 410 VarBasedMoverChecksPositive, 39 VarBasedMoverChecksNegative, 13 SemBasedMoverChecksPositive, 26 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 62 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 0.9s, 49 PlacesBefore, 21 PlacesAfterwards, 51 TransitionsBefore, 22 TransitionsAfterwards, 672 CoEnabledTransitionPairs, 5 FixpointIterations, 10 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 37 TotalNumberOfCompositions, 1287 MoverChecksTotal - PositiveResult [Line: 681]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 690]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, HoareTripleCheckerStatistics: 93 SDtfs, 44 SDslu, 33 SDs, 0 SdLazy, 33 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 521 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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 proved your program to be correct! Received shutdown request...