./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:02:45,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:02:45,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:02:45,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:02:45,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:02:45,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:02:45,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:02:45,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:02:45,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:02:45,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:02:45,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:02:45,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:02:45,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:02:45,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:02:45,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:02:45,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:02:45,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:02:45,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:02:45,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:02:45,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:02:45,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:02:45,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:02:45,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:02:45,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:02:45,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:02:45,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:02:45,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:02:45,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:02:45,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:02:45,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:02:45,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:02:45,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:02:45,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:02:45,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:02:45,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:02:45,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:02:45,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:02:45,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:02:45,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:02:45,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:02:45,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:02:45,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:02:45,733 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:02:45,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:02:45,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:02:45,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:02:45,735 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:02:45,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:02:45,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:02:45,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:02:45,736 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:02:45,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:02:45,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:02:45,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:02:45,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:02:45,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:02:45,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:02:45,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:02:45,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:02:45,738 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:02:45,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:02:45,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:02:45,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:02:45,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:02:45,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:02:45,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:02:45,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:02:45,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:02:45,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:02:45,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:02:45,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:02:45,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:02:45,741 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:02:45,741 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:02:45,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:02:45,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:02:45,742 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 [2021-12-16 03:02:45,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:02:45,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:02:45,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:02:45,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:02:45,971 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:02:45,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2021-12-16 03:02:46,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19462fabf/34860be04cb8455e9b16e8e156765b7e/FLAGcd1d56bfb [2021-12-16 03:02:46,391 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:02:46,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2021-12-16 03:02:46,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19462fabf/34860be04cb8455e9b16e8e156765b7e/FLAGcd1d56bfb [2021-12-16 03:02:46,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19462fabf/34860be04cb8455e9b16e8e156765b7e [2021-12-16 03:02:46,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:02:46,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:02:46,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:02:46,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:02:46,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:02:46,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:02:46" (1/1) ... [2021-12-16 03:02:46,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b824a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:46, skipping insertion in model container [2021-12-16 03:02:46,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:02:46" (1/1) ... [2021-12-16 03:02:46,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:02:46,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:02:47,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2021-12-16 03:02:47,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:02:47,037 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:02:47,072 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2021-12-16 03:02:47,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:02:47,088 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:02:47,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47 WrapperNode [2021-12-16 03:02:47,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:02:47,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:02:47,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:02:47,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:02:47,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (1/1) ... [2021-12-16 03:02:47,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (1/1) ... [2021-12-16 03:02:47,141 INFO L137 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 186 [2021-12-16 03:02:47,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:02:47,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:02:47,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:02:47,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:02:47,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (1/1) ... [2021-12-16 03:02:47,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (1/1) ... [2021-12-16 03:02:47,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (1/1) ... [2021-12-16 03:02:47,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (1/1) ... [2021-12-16 03:02:47,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (1/1) ... [2021-12-16 03:02:47,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (1/1) ... [2021-12-16 03:02:47,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (1/1) ... [2021-12-16 03:02:47,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:02:47,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:02:47,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:02:47,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:02:47,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (1/1) ... [2021-12-16 03:02:47,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:02:47,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:47,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 03:02:47,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 03:02:47,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:02:47,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 03:02:47,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:02:47,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:02:47,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:02:47,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 03:02:47,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:02:47,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:02:47,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:02:47,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:02:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:02:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:02:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:02:47,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:02:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:02:47,301 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:02:47,385 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:02:47,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:02:47,733 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:02:47,743 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:02:47,747 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-16 03:02:47,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:02:47 BoogieIcfgContainer [2021-12-16 03:02:47,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:02:47,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:02:47,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:02:47,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:02:47,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:02:46" (1/3) ... [2021-12-16 03:02:47,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387f4090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:02:47, skipping insertion in model container [2021-12-16 03:02:47,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:47" (2/3) ... [2021-12-16 03:02:47,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387f4090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:02:47, skipping insertion in model container [2021-12-16 03:02:47,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:02:47" (3/3) ... [2021-12-16 03:02:47,760 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2021-12-16 03:02:47,765 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:02:47,765 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:02:47,765 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:02:47,766 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:02:47,802 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,803 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,803 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,803 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,803 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,803 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,804 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,804 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,804 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,804 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,804 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,804 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,805 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,805 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,805 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,805 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,805 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,806 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,806 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,806 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,806 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,806 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,806 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,807 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,807 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,807 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,807 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,807 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,807 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,808 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,808 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,808 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,808 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,809 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,809 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,809 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,809 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,809 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,809 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,810 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,810 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,810 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,810 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,810 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,810 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,811 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,811 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,811 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,811 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,811 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,811 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,812 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,812 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,812 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,812 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,812 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,812 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,813 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,813 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,813 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,813 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,813 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,813 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,814 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,814 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,814 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,814 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,814 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,814 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,815 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,815 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,815 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,815 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,815 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,815 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,816 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,816 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,816 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,816 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,816 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,816 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,817 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,817 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,817 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,817 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,817 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,817 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,818 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,818 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,818 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,818 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,818 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,821 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,822 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,826 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,826 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:47,827 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:02:47,862 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:02:47,868 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 03:02:47,868 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:02:47,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 260 places, 279 transitions, 574 flow [2021-12-16 03:02:47,958 INFO L129 PetriNetUnfolder]: 26/277 cut-off events. [2021-12-16 03:02:47,959 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:02:47,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 277 events. 26/277 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 269 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 211. Up to 2 conditions per place. [2021-12-16 03:02:47,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 279 transitions, 574 flow [2021-12-16 03:02:47,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 268 transitions, 548 flow [2021-12-16 03:02:48,010 INFO L129 PetriNetUnfolder]: 26/267 cut-off events. [2021-12-16 03:02:48,010 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:02:48,010 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:48,011 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:48,011 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:48,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1050114858, now seen corresponding path program 1 times [2021-12-16 03:02:48,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:48,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79675664] [2021-12-16 03:02:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:48,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:48,127 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:02:48,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508289100] [2021-12-16 03:02:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:48,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:48,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:48,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:02:48,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:02:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:48,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-16 03:02:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:48,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:02:48,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:48,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79675664] [2021-12-16 03:02:48,524 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:02:48,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508289100] [2021-12-16 03:02:48,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508289100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:48,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:48,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:02:48,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632394053] [2021-12-16 03:02:48,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:48,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:02:48,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:48,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:02:48,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:02:48,552 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 279 [2021-12-16 03:02:48,555 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 268 transitions, 548 flow. Second operand has 2 states, 2 states have (on average 258.5) internal successors, (517), 2 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:48,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:48,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 279 [2021-12-16 03:02:48,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:48,593 INFO L129 PetriNetUnfolder]: 7/249 cut-off events. [2021-12-16 03:02:48,593 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-16 03:02:48,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 249 events. 7/249 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 0 based on Foata normal form. 22/252 useless extension candidates. Maximal degree in co-relation 197. Up to 5 conditions per place. [2021-12-16 03:02:48,596 INFO L132 encePairwiseOnDemand]: 260/279 looper letters, 4 selfloop transitions, 0 changer transitions 12/249 dead transitions. [2021-12-16 03:02:48,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 249 transitions, 518 flow [2021-12-16 03:02:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:02:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:02:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 533 transitions. [2021-12-16 03:02:48,606 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9551971326164874 [2021-12-16 03:02:48,607 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 533 transitions. [2021-12-16 03:02:48,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 533 transitions. [2021-12-16 03:02:48,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:48,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 533 transitions. [2021-12-16 03:02:48,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 266.5) internal successors, (533), 2 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:48,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:48,634 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:48,635 INFO L186 Difference]: Start difference. First operand has 249 places, 268 transitions, 548 flow. Second operand 2 states and 533 transitions. [2021-12-16 03:02:48,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 249 transitions, 518 flow [2021-12-16 03:02:48,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 249 transitions, 510 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:02:48,643 INFO L242 Difference]: Finished difference. Result has 246 places, 237 transitions, 478 flow [2021-12-16 03:02:48,644 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=478, PETRI_PLACES=246, PETRI_TRANSITIONS=237} [2021-12-16 03:02:48,647 INFO L334 CegarLoopForPetriNet]: 249 programPoint places, -3 predicate places. [2021-12-16 03:02:48,648 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 237 transitions, 478 flow [2021-12-16 03:02:48,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 258.5) internal successors, (517), 2 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:48,648 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:48,648 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:48,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 03:02:48,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-16 03:02:48,882 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:48,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1625615327, now seen corresponding path program 1 times [2021-12-16 03:02:48,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:48,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306592235] [2021-12-16 03:02:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:48,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:48,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:02:48,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072067610] [2021-12-16 03:02:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:48,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:48,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:02:48,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:02:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:49,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 03:02:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:49,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:02:49,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:49,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306592235] [2021-12-16 03:02:49,288 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:02:49,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072067610] [2021-12-16 03:02:49,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072067610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:49,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:49,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:02:49,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880682197] [2021-12-16 03:02:49,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:49,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:02:49,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:49,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:02:49,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:02:49,294 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 279 [2021-12-16 03:02:49,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 237 transitions, 478 flow. Second operand has 6 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:49,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:49,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 279 [2021-12-16 03:02:49,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:49,448 INFO L129 PetriNetUnfolder]: 21/377 cut-off events. [2021-12-16 03:02:49,448 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-16 03:02:49,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 377 events. 21/377 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 666 event pairs, 4 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 480. Up to 66 conditions per place. [2021-12-16 03:02:49,450 INFO L132 encePairwiseOnDemand]: 271/279 looper letters, 73 selfloop transitions, 4 changer transitions 10/259 dead transitions. [2021-12-16 03:02:49,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 259 transitions, 700 flow [2021-12-16 03:02:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:02:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:02:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1362 transitions. [2021-12-16 03:02:49,453 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6973886328725039 [2021-12-16 03:02:49,454 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1362 transitions. [2021-12-16 03:02:49,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1362 transitions. [2021-12-16 03:02:49,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:49,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1362 transitions. [2021-12-16 03:02:49,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 194.57142857142858) internal successors, (1362), 7 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:49,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 279.0) internal successors, (2232), 8 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:49,461 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 279.0) internal successors, (2232), 8 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:49,462 INFO L186 Difference]: Start difference. First operand has 246 places, 237 transitions, 478 flow. Second operand 7 states and 1362 transitions. [2021-12-16 03:02:49,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 259 transitions, 700 flow [2021-12-16 03:02:49,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 259 transitions, 700 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:02:49,467 INFO L242 Difference]: Finished difference. Result has 244 places, 238 transitions, 500 flow [2021-12-16 03:02:49,467 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=500, PETRI_PLACES=244, PETRI_TRANSITIONS=238} [2021-12-16 03:02:49,468 INFO L334 CegarLoopForPetriNet]: 249 programPoint places, -5 predicate places. [2021-12-16 03:02:49,468 INFO L470 AbstractCegarLoop]: Abstraction has has 244 places, 238 transitions, 500 flow [2021-12-16 03:02:49,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:49,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:49,469 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:49,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:49,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-16 03:02:49,683 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1714519334, now seen corresponding path program 1 times [2021-12-16 03:02:49,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:49,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771624306] [2021-12-16 03:02:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:49,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:49,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:02:49,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826522572] [2021-12-16 03:02:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:49,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:49,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:49,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:02:49,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:02:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:49,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 03:02:49,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:50,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:02:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:50,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:50,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771624306] [2021-12-16 03:02:50,306 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:02:50,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826522572] [2021-12-16 03:02:50,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826522572] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:02:50,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:02:50,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-16 03:02:50,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457129059] [2021-12-16 03:02:50,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 03:02:50,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:02:50,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:02:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:02:50,313 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 279 [2021-12-16 03:02:50,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 238 transitions, 500 flow. Second operand has 6 states, 6 states have (on average 236.83333333333334) internal successors, (1421), 6 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:50,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:50,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 279 [2021-12-16 03:02:50,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:50,412 INFO L129 PetriNetUnfolder]: 23/334 cut-off events. [2021-12-16 03:02:50,412 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-12-16 03:02:50,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 334 events. 23/334 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 600 event pairs, 4 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 404. Up to 17 conditions per place. [2021-12-16 03:02:50,417 INFO L132 encePairwiseOnDemand]: 271/279 looper letters, 29 selfloop transitions, 8 changer transitions 0/248 dead transitions. [2021-12-16 03:02:50,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 248 transitions, 596 flow [2021-12-16 03:02:50,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:02:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:02:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1669 transitions. [2021-12-16 03:02:50,421 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8545826932923707 [2021-12-16 03:02:50,421 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1669 transitions. [2021-12-16 03:02:50,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1669 transitions. [2021-12-16 03:02:50,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:50,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1669 transitions. [2021-12-16 03:02:50,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 238.42857142857142) internal successors, (1669), 7 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:50,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 279.0) internal successors, (2232), 8 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:50,429 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 279.0) internal successors, (2232), 8 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:50,429 INFO L186 Difference]: Start difference. First operand has 244 places, 238 transitions, 500 flow. Second operand 7 states and 1669 transitions. [2021-12-16 03:02:50,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 248 transitions, 596 flow [2021-12-16 03:02:50,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 248 transitions, 584 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-12-16 03:02:50,439 INFO L242 Difference]: Finished difference. Result has 245 places, 241 transitions, 527 flow [2021-12-16 03:02:50,439 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=245, PETRI_TRANSITIONS=241} [2021-12-16 03:02:50,441 INFO L334 CegarLoopForPetriNet]: 249 programPoint places, -4 predicate places. [2021-12-16 03:02:50,441 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 241 transitions, 527 flow [2021-12-16 03:02:50,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.83333333333334) internal successors, (1421), 6 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:50,442 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:50,442 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:50,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:50,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:50,661 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:50,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:50,662 INFO L85 PathProgramCache]: Analyzing trace with hash -290004070, now seen corresponding path program 1 times [2021-12-16 03:02:50,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:50,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828897586] [2021-12-16 03:02:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:50,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:50,677 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:02:50,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714080149] [2021-12-16 03:02:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:50,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:50,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:50,695 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:02:50,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:02:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:50,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 03:02:50,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:02:51,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:02:51,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:51,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828897586] [2021-12-16 03:02:51,109 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:02:51,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714080149] [2021-12-16 03:02:51,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714080149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:51,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:51,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:51,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555805463] [2021-12-16 03:02:51,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:51,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:51,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:51,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:51,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:51,115 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 279 [2021-12-16 03:02:51,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 241 transitions, 527 flow. Second operand has 8 states, 8 states have (on average 167.375) internal successors, (1339), 8 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:51,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 279 [2021-12-16 03:02:51,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:51,388 INFO L129 PetriNetUnfolder]: 39/585 cut-off events. [2021-12-16 03:02:51,389 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2021-12-16 03:02:51,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 585 events. 39/585 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1935 event pairs, 18 based on Foata normal form. 2/564 useless extension candidates. Maximal degree in co-relation 847. Up to 64 conditions per place. [2021-12-16 03:02:51,391 INFO L132 encePairwiseOnDemand]: 268/279 looper letters, 88 selfloop transitions, 7 changer transitions 46/293 dead transitions. [2021-12-16 03:02:51,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 293 transitions, 921 flow [2021-12-16 03:02:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 03:02:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-16 03:02:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2197 transitions. [2021-12-16 03:02:51,395 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6057347670250897 [2021-12-16 03:02:51,395 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2197 transitions. [2021-12-16 03:02:51,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2197 transitions. [2021-12-16 03:02:51,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:51,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2197 transitions. [2021-12-16 03:02:51,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 279.0) internal successors, (3906), 14 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,404 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 279.0) internal successors, (3906), 14 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,404 INFO L186 Difference]: Start difference. First operand has 245 places, 241 transitions, 527 flow. Second operand 13 states and 2197 transitions. [2021-12-16 03:02:51,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 293 transitions, 921 flow [2021-12-16 03:02:51,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 293 transitions, 920 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-16 03:02:51,408 INFO L242 Difference]: Finished difference. Result has 265 places, 244 transitions, 581 flow [2021-12-16 03:02:51,409 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=581, PETRI_PLACES=265, PETRI_TRANSITIONS=244} [2021-12-16 03:02:51,409 INFO L334 CegarLoopForPetriNet]: 249 programPoint places, 16 predicate places. [2021-12-16 03:02:51,410 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 244 transitions, 581 flow [2021-12-16 03:02:51,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 167.375) internal successors, (1339), 8 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,410 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:51,410 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:51,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:51,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:51,625 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:51,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1177867469, now seen corresponding path program 1 times [2021-12-16 03:02:51,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:51,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415746613] [2021-12-16 03:02:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:51,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:51,642 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:02:51,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180526334] [2021-12-16 03:02:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:51,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:51,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:51,644 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:02:51,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:02:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:51,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 03:02:51,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:52,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:02:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:52,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415746613] [2021-12-16 03:02:52,424 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:02:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180526334] [2021-12-16 03:02:52,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180526334] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:52,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:02:52,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-12-16 03:02:52,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360010042] [2021-12-16 03:02:52,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:52,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:02:52,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:02:52,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:02:52,427 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 279 [2021-12-16 03:02:52,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 244 transitions, 581 flow. Second operand has 7 states, 7 states have (on average 210.85714285714286) internal successors, (1476), 7 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:52,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 279 [2021-12-16 03:02:52,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:52,628 INFO L129 PetriNetUnfolder]: 26/349 cut-off events. [2021-12-16 03:02:52,628 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2021-12-16 03:02:52,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 349 events. 26/349 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 564 event pairs, 4 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 523. Up to 43 conditions per place. [2021-12-16 03:02:52,630 INFO L132 encePairwiseOnDemand]: 267/279 looper letters, 54 selfloop transitions, 11 changer transitions 0/252 dead transitions. [2021-12-16 03:02:52,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 252 transitions, 735 flow [2021-12-16 03:02:52,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:02:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 03:02:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1910 transitions. [2021-12-16 03:02:52,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7606531262445241 [2021-12-16 03:02:52,634 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1910 transitions. [2021-12-16 03:02:52,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1910 transitions. [2021-12-16 03:02:52,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:52,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1910 transitions. [2021-12-16 03:02:52,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 212.22222222222223) internal successors, (1910), 9 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 279.0) internal successors, (2790), 10 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,661 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 279.0) internal successors, (2790), 10 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,661 INFO L186 Difference]: Start difference. First operand has 265 places, 244 transitions, 581 flow. Second operand 9 states and 1910 transitions. [2021-12-16 03:02:52,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 252 transitions, 735 flow [2021-12-16 03:02:52,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 252 transitions, 711 flow, removed 9 selfloop flow, removed 8 redundant places. [2021-12-16 03:02:52,665 INFO L242 Difference]: Finished difference. Result has 263 places, 248 transitions, 617 flow [2021-12-16 03:02:52,665 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=617, PETRI_PLACES=263, PETRI_TRANSITIONS=248} [2021-12-16 03:02:52,666 INFO L334 CegarLoopForPetriNet]: 249 programPoint places, 14 predicate places. [2021-12-16 03:02:52,666 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 248 transitions, 617 flow [2021-12-16 03:02:52,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 210.85714285714286) internal successors, (1476), 7 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,667 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:52,667 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:52,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:52,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:52,900 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:52,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2142216354, now seen corresponding path program 1 times [2021-12-16 03:02:52,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:52,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699465776] [2021-12-16 03:02:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:52,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:52,917 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:02:52,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702317530] [2021-12-16 03:02:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:52,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:52,940 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:02:52,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:02:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:53,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:02:53,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:02:53,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:02:53,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:53,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699465776] [2021-12-16 03:02:53,734 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:02:53,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702317530] [2021-12-16 03:02:53,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702317530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:53,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:53,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 03:02:53,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158078289] [2021-12-16 03:02:53,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:53,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 03:02:53,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:53,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 03:02:53,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:02:53,737 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 279 [2021-12-16 03:02:53,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 248 transitions, 617 flow. Second operand has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:53,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:53,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 279 [2021-12-16 03:02:53,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:54,029 INFO L129 PetriNetUnfolder]: 67/594 cut-off events. [2021-12-16 03:02:54,030 INFO L130 PetriNetUnfolder]: For 145/166 co-relation queries the response was YES. [2021-12-16 03:02:54,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 594 events. 67/594 cut-off events. For 145/166 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1527 event pairs, 29 based on Foata normal form. 22/581 useless extension candidates. Maximal degree in co-relation 956. Up to 150 conditions per place. [2021-12-16 03:02:54,032 INFO L132 encePairwiseOnDemand]: 260/279 looper letters, 73 selfloop transitions, 12 changer transitions 35/291 dead transitions. [2021-12-16 03:02:54,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 291 transitions, 996 flow [2021-12-16 03:02:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 03:02:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-16 03:02:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3377 transitions. [2021-12-16 03:02:54,037 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7119966266076323 [2021-12-16 03:02:54,037 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3377 transitions. [2021-12-16 03:02:54,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3377 transitions. [2021-12-16 03:02:54,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:54,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3377 transitions. [2021-12-16 03:02:54,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 198.64705882352942) internal successors, (3377), 17 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 279.0) internal successors, (5022), 18 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,049 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 279.0) internal successors, (5022), 18 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,049 INFO L186 Difference]: Start difference. First operand has 263 places, 248 transitions, 617 flow. Second operand 17 states and 3377 transitions. [2021-12-16 03:02:54,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 291 transitions, 996 flow [2021-12-16 03:02:54,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 291 transitions, 968 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-12-16 03:02:54,054 INFO L242 Difference]: Finished difference. Result has 283 places, 250 transitions, 656 flow [2021-12-16 03:02:54,054 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=656, PETRI_PLACES=283, PETRI_TRANSITIONS=250} [2021-12-16 03:02:54,055 INFO L334 CegarLoopForPetriNet]: 249 programPoint places, 34 predicate places. [2021-12-16 03:02:54,055 INFO L470 AbstractCegarLoop]: Abstraction has has 283 places, 250 transitions, 656 flow [2021-12-16 03:02:54,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,056 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:54,056 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:54,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:54,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:54,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:54,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2046181951, now seen corresponding path program 1 times [2021-12-16 03:02:54,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:54,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063211985] [2021-12-16 03:02:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:54,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:54,291 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:02:54,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338471075] [2021-12-16 03:02:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:54,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:54,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:54,292 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:02:54,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:02:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:54,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 03:02:54,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 03:02:54,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:02:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 03:02:55,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063211985] [2021-12-16 03:02:55,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:02:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338471075] [2021-12-16 03:02:55,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338471075] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:55,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:02:55,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-12-16 03:02:55,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562501365] [2021-12-16 03:02:55,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:55,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:02:55,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:55,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:02:55,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:02:55,089 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 279 [2021-12-16 03:02:55,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 250 transitions, 656 flow. Second operand has 7 states, 7 states have (on average 216.28571428571428) internal successors, (1514), 7 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:55,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:55,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 279 [2021-12-16 03:02:55,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:55,170 INFO L129 PetriNetUnfolder]: 17/334 cut-off events. [2021-12-16 03:02:55,170 INFO L130 PetriNetUnfolder]: For 72/80 co-relation queries the response was YES. [2021-12-16 03:02:55,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 334 events. 17/334 cut-off events. For 72/80 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 381 event pairs, 2 based on Foata normal form. 1/330 useless extension candidates. Maximal degree in co-relation 524. Up to 67 conditions per place. [2021-12-16 03:02:55,172 INFO L132 encePairwiseOnDemand]: 271/279 looper letters, 53 selfloop transitions, 7 changer transitions 0/253 dead transitions. [2021-12-16 03:02:55,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 253 transitions, 783 flow [2021-12-16 03:02:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:02:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:02:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1523 transitions. [2021-12-16 03:02:55,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7798259088581669 [2021-12-16 03:02:55,174 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1523 transitions. [2021-12-16 03:02:55,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1523 transitions. [2021-12-16 03:02:55,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:55,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1523 transitions. [2021-12-16 03:02:55,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 217.57142857142858) internal successors, (1523), 7 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:55,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 279.0) internal successors, (2232), 8 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:55,179 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 279.0) internal successors, (2232), 8 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:55,180 INFO L186 Difference]: Start difference. First operand has 283 places, 250 transitions, 656 flow. Second operand 7 states and 1523 transitions. [2021-12-16 03:02:55,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 253 transitions, 783 flow [2021-12-16 03:02:55,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 253 transitions, 747 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-12-16 03:02:55,184 INFO L242 Difference]: Finished difference. Result has 270 places, 252 transitions, 653 flow [2021-12-16 03:02:55,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=653, PETRI_PLACES=270, PETRI_TRANSITIONS=252} [2021-12-16 03:02:55,184 INFO L334 CegarLoopForPetriNet]: 249 programPoint places, 21 predicate places. [2021-12-16 03:02:55,185 INFO L470 AbstractCegarLoop]: Abstraction has has 270 places, 252 transitions, 653 flow [2021-12-16 03:02:55,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 216.28571428571428) internal successors, (1514), 7 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:55,185 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:55,185 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:55,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:55,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:55,403 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1767131809, now seen corresponding path program 1 times [2021-12-16 03:02:55,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:55,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364612714] [2021-12-16 03:02:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:55,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:55,418 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:02:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7407675] [2021-12-16 03:02:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:55,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:55,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:55,444 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:02:55,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 03:02:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:55,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-16 03:02:55,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:56,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:02:56,577 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 03:02:56,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 03:02:56,934 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 03:02:56,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 03:02:57,577 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-16 03:02:57,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 03:02:58,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 03:02:58,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:02:58,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-16 03:02:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:02:58,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-16 03:02:59,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-12-16 03:02:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-16 03:02:59,750 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 03:02:59,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 59 [2021-12-16 03:02:59,780 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-12-16 03:02:59,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 33 [2021-12-16 03:02:59,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 49 [2021-12-16 03:03:00,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:03:00,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2021-12-16 03:03:00,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:03:00,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-12-16 03:03:00,834 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-12-16 03:03:00,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 16 [2021-12-16 03:03:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:03:00,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:03:04,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:03:04,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 322 treesize of output 298 [2021-12-16 03:03:04,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 137