./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/popl20-more-multiply-verify.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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:22:08,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:22:08,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:22:08,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:22:08,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:22:08,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:22:08,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:22:08,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:22:08,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:22:08,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:22:08,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:22:08,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:22:08,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:22:08,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:22:08,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:22:08,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:22:08,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:22:08,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:22:08,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:22:08,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:22:08,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:22:08,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:22:08,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:22:08,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:22:08,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:22:08,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:22:08,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:22:08,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:22:08,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:22:08,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:22:08,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:22:08,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:22:08,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:22:08,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:22:08,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:22:08,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:22:08,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:22:08,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:22:08,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:22:08,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:22:08,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:22:08,623 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:22:08,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:22:08,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:22:08,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:22:08,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:22:08,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:22:08,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:22:08,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:22:08,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:22:08,650 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:22:08,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:22:08,651 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:22:08,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:22:08,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:22:08,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:22:08,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:22:08,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:22:08,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:22:08,653 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:22:08,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:22:08,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:22:08,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:22:08,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:22:08,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:22:08,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:22:08,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:22:08,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:22:08,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:22:08,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:22:08,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:22:08,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:22:08,655 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:22:08,656 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:22:08,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:22:08,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:22:08,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2021-12-21 15:22:08,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:22:08,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:22:08,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:22:08,858 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:22:08,858 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:22:08,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2021-12-21 15:22:08,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/810f93260/32d49d267fab48e3a119b5e07494fd80/FLAG9dce8bb2c [2021-12-21 15:22:09,257 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:22:09,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2021-12-21 15:22:09,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/810f93260/32d49d267fab48e3a119b5e07494fd80/FLAG9dce8bb2c [2021-12-21 15:22:09,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/810f93260/32d49d267fab48e3a119b5e07494fd80 [2021-12-21 15:22:09,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:22:09,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:22:09,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:22:09,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:22:09,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:22:09,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:09,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53aaddeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09, skipping insertion in model container [2021-12-21 15:22:09,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:09,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:22:09,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:22:09,883 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/popl20-more-multiply-verify.wvr.c[3042,3055] [2021-12-21 15:22:09,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:22:09,893 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:22:09,909 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/popl20-more-multiply-verify.wvr.c[3042,3055] [2021-12-21 15:22:09,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:22:09,934 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:22:09,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09 WrapperNode [2021-12-21 15:22:09,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:22:09,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:22:09,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:22:09,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:22:09,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:09,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:09,982 INFO L137 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2021-12-21 15:22:09,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:22:09,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:22:09,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:22:09,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:22:09,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:09,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:09,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:09,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:09,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:09,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:10,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:10,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:22:10,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:22:10,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:22:10,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:22:10,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (1/1) ... [2021-12-21 15:22:10,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:22:10,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:10,029 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) [2021-12-21 15:22:10,040 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 [2021-12-21 15:22:10,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:22:10,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:22:10,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:22:10,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:22:10,061 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:22:10,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:22:10,061 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:22:10,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:22:10,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-21 15:22:10,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-21 15:22:10,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:22:10,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:22:10,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:22:10,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:22:10,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:22:10,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:22:10,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:22:10,065 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:22:10,167 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:22:10,169 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:22:10,484 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:22:10,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:22:10,575 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 15:22:10,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:22:10 BoogieIcfgContainer [2021-12-21 15:22:10,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:22:10,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:22:10,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:22:10,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:22:10,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:22:09" (1/3) ... [2021-12-21 15:22:10,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1620b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:22:10, skipping insertion in model container [2021-12-21 15:22:10,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:09" (2/3) ... [2021-12-21 15:22:10,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1620b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:22:10, skipping insertion in model container [2021-12-21 15:22:10,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:22:10" (3/3) ... [2021-12-21 15:22:10,583 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2021-12-21 15:22:10,589 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:22:10,590 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:22:10,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:22:10,590 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:22:10,637 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~x~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,637 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~x~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,637 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,637 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,638 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,639 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,640 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,640 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~x~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,642 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~x~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,642 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,642 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,643 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,643 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,643 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~x~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,644 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~x~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,644 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~x~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,644 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~x~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,644 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,647 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,647 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,647 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~x~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,648 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~x~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,648 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,648 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,648 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,649 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,650 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,650 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,652 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~x~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,653 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,653 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,653 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,653 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~x~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,660 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~x~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,661 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~x~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,661 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~x~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,661 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~x~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,661 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,661 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,662 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,662 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,662 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,662 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,662 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,662 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,663 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,663 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,663 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,663 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,663 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,663 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,664 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,664 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,665 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,665 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,666 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,666 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,669 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,669 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,669 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,670 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,670 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,674 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,674 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,675 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,675 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,675 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,678 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,678 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,678 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,679 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,679 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,679 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,679 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~x~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,680 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,681 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,681 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,681 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,681 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,681 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~x~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,683 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,683 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,683 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,683 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:10,685 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-21 15:22:10,729 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:22:10,735 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 [2021-12-21 15:22:10,736 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-21 15:22:10,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 154 transitions, 332 flow [2021-12-21 15:22:10,812 INFO L129 PetriNetUnfolder]: 9/151 cut-off events. [2021-12-21 15:22:10,813 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:22:10,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 9/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2021-12-21 15:22:10,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 154 transitions, 332 flow [2021-12-21 15:22:10,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 140 transitions, 298 flow [2021-12-21 15:22:10,867 INFO L129 PetriNetUnfolder]: 9/139 cut-off events. [2021-12-21 15:22:10,868 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:22:10,868 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:10,869 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] [2021-12-21 15:22:10,869 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:10,874 INFO L85 PathProgramCache]: Analyzing trace with hash 434015461, now seen corresponding path program 1 times [2021-12-21 15:22:10,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:10,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961855681] [2021-12-21 15:22:10,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:10,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:11,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:11,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961855681] [2021-12-21 15:22:11,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961855681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:22:11,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:22:11,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:22:11,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456158016] [2021-12-21 15:22:11,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:11,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:22:11,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:11,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:22:11,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:22:11,114 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 154 [2021-12-21 15:22:11,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 298 flow. Second operand has 2 states, 2 states have (on average 144.0) internal successors, (288), 2 states have internal predecessors, (288), 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) [2021-12-21 15:22:11,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:11,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 154 [2021-12-21 15:22:11,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:11,178 INFO L129 PetriNetUnfolder]: 18/215 cut-off events. [2021-12-21 15:22:11,178 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-12-21 15:22:11,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 215 events. 18/215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 458 event pairs, 15 based on Foata normal form. 19/223 useless extension candidates. Maximal degree in co-relation 150. Up to 37 conditions per place. [2021-12-21 15:22:11,181 INFO L132 encePairwiseOnDemand]: 148/154 looper letters, 9 selfloop transitions, 0 changer transitions 3/134 dead transitions. [2021-12-21 15:22:11,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 134 transitions, 304 flow [2021-12-21 15:22:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:22:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:22:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 291 transitions. [2021-12-21 15:22:11,196 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9448051948051948 [2021-12-21 15:22:11,197 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 291 transitions. [2021-12-21 15:22:11,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 291 transitions. [2021-12-21 15:22:11,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:11,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 291 transitions. [2021-12-21 15:22:11,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 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) [2021-12-21 15:22:11,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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) [2021-12-21 15:22:11,212 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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) [2021-12-21 15:22:11,213 INFO L186 Difference]: Start difference. First operand has 141 places, 140 transitions, 298 flow. Second operand 2 states and 291 transitions. [2021-12-21 15:22:11,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 134 transitions, 304 flow [2021-12-21 15:22:11,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-21 15:22:11,220 INFO L242 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2021-12-21 15:22:11,222 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2021-12-21 15:22:11,226 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2021-12-21 15:22:11,227 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2021-12-21 15:22:11,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 144.0) internal successors, (288), 2 states have internal predecessors, (288), 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) [2021-12-21 15:22:11,227 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:11,227 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] [2021-12-21 15:22:11,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:22:11,228 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash -749841678, now seen corresponding path program 1 times [2021-12-21 15:22:11,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:11,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564481506] [2021-12-21 15:22:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:11,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:11,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:11,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564481506] [2021-12-21 15:22:11,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564481506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:22:11,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:22:11,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:22:11,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128039694] [2021-12-21 15:22:11,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:11,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:22:11,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:11,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:22:11,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:22:11,385 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 154 [2021-12-21 15:22:11,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 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) [2021-12-21 15:22:11,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:11,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 154 [2021-12-21 15:22:11,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:11,493 INFO L129 PetriNetUnfolder]: 20/259 cut-off events. [2021-12-21 15:22:11,493 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-12-21 15:22:11,495 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 259 events. 20/259 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 618 event pairs, 15 based on Foata normal form. 6/254 useless extension candidates. Maximal degree in co-relation 327. Up to 46 conditions per place. [2021-12-21 15:22:11,496 INFO L132 encePairwiseOnDemand]: 144/154 looper letters, 21 selfloop transitions, 6 changer transitions 4/139 dead transitions. [2021-12-21 15:22:11,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 139 transitions, 349 flow [2021-12-21 15:22:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:22:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:22:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 902 transitions. [2021-12-21 15:22:11,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8367346938775511 [2021-12-21 15:22:11,499 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 902 transitions. [2021-12-21 15:22:11,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 902 transitions. [2021-12-21 15:22:11,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:11,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 902 transitions. [2021-12-21 15:22:11,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.85714285714286) internal successors, (902), 7 states have internal predecessors, (902), 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) [2021-12-21 15:22:11,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 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) [2021-12-21 15:22:11,506 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 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) [2021-12-21 15:22:11,506 INFO L186 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 7 states and 902 transitions. [2021-12-21 15:22:11,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 139 transitions, 349 flow [2021-12-21 15:22:11,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:22:11,509 INFO L242 Difference]: Finished difference. Result has 141 places, 132 transitions, 294 flow [2021-12-21 15:22:11,510 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=141, PETRI_TRANSITIONS=132} [2021-12-21 15:22:11,511 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2021-12-21 15:22:11,511 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 132 transitions, 294 flow [2021-12-21 15:22:11,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 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) [2021-12-21 15:22:11,512 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:11,512 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] [2021-12-21 15:22:11,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:22:11,512 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:11,513 INFO L85 PathProgramCache]: Analyzing trace with hash 370033410, now seen corresponding path program 1 times [2021-12-21 15:22:11,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:11,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435151371] [2021-12-21 15:22:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:11,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:11,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:11,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435151371] [2021-12-21 15:22:11,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435151371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:11,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120421877] [2021-12-21 15:22:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:11,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:11,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:11,673 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) [2021-12-21 15:22:11,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:22:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:11,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 15:22:11,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:12,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:12,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120421877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:22:12,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:22:12,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2021-12-21 15:22:12,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700931648] [2021-12-21 15:22:12,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:22:12,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 15:22:12,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:12,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 15:22:12,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-12-21 15:22:12,470 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 154 [2021-12-21 15:22:12,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 132 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 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) [2021-12-21 15:22:12,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:12,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 154 [2021-12-21 15:22:12,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:12,683 INFO L129 PetriNetUnfolder]: 24/300 cut-off events. [2021-12-21 15:22:12,683 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-12-21 15:22:12,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 300 events. 24/300 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 855 event pairs, 15 based on Foata normal form. 9/299 useless extension candidates. Maximal degree in co-relation 426. Up to 44 conditions per place. [2021-12-21 15:22:12,685 INFO L132 encePairwiseOnDemand]: 140/154 looper letters, 23 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2021-12-21 15:22:12,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 149 transitions, 430 flow [2021-12-21 15:22:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:22:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:22:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1621 transitions. [2021-12-21 15:22:12,689 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8096903096903096 [2021-12-21 15:22:12,689 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1621 transitions. [2021-12-21 15:22:12,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1621 transitions. [2021-12-21 15:22:12,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:12,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1621 transitions. [2021-12-21 15:22:12,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.6923076923077) internal successors, (1621), 13 states have internal predecessors, (1621), 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) [2021-12-21 15:22:12,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2021-12-21 15:22:12,696 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2021-12-21 15:22:12,697 INFO L186 Difference]: Start difference. First operand has 141 places, 132 transitions, 294 flow. Second operand 13 states and 1621 transitions. [2021-12-21 15:22:12,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 149 transitions, 430 flow [2021-12-21 15:22:12,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 149 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:22:12,700 INFO L242 Difference]: Finished difference. Result has 154 places, 136 transitions, 349 flow [2021-12-21 15:22:12,700 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=349, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2021-12-21 15:22:12,702 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 13 predicate places. [2021-12-21 15:22:12,702 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 349 flow [2021-12-21 15:22:12,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 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) [2021-12-21 15:22:12,704 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:12,705 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:12,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:12,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:12,923 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:12,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash -542727054, now seen corresponding path program 2 times [2021-12-21 15:22:12,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:12,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050754149] [2021-12-21 15:22:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:12,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:15,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:15,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050754149] [2021-12-21 15:22:15,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050754149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:15,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582346125] [2021-12-21 15:22:15,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:22:15,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:15,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:15,324 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) [2021-12-21 15:22:15,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:22:15,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 15:22:15,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:22:15,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-21 15:22:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:15,931 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-21 15:22:15,932 INFO L387 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 51 treesize of output 17 [2021-12-21 15:22:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:22:16,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:22:16,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582346125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:22:16,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:22:16,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [35] total 43 [2021-12-21 15:22:16,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220347153] [2021-12-21 15:22:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:16,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:22:16,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:22:16,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 15:22:16,037 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2021-12-21 15:22:16,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 349 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2021-12-21 15:22:16,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:16,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2021-12-21 15:22:16,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:16,548 INFO L129 PetriNetUnfolder]: 454/1130 cut-off events. [2021-12-21 15:22:16,549 INFO L130 PetriNetUnfolder]: For 973/1027 co-relation queries the response was YES. [2021-12-21 15:22:16,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2456 conditions, 1130 events. 454/1130 cut-off events. For 973/1027 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6256 event pairs, 159 based on Foata normal form. 31/1095 useless extension candidates. Maximal degree in co-relation 2444. Up to 531 conditions per place. [2021-12-21 15:22:16,558 INFO L132 encePairwiseOnDemand]: 138/154 looper letters, 66 selfloop transitions, 17 changer transitions 36/209 dead transitions. [2021-12-21 15:22:16,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 209 transitions, 805 flow [2021-12-21 15:22:16,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:22:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:22:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1398 transitions. [2021-12-21 15:22:16,561 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6983016983016983 [2021-12-21 15:22:16,561 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1398 transitions. [2021-12-21 15:22:16,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1398 transitions. [2021-12-21 15:22:16,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:16,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1398 transitions. [2021-12-21 15:22:16,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.53846153846153) internal successors, (1398), 13 states have internal predecessors, (1398), 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) [2021-12-21 15:22:16,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2021-12-21 15:22:16,567 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2021-12-21 15:22:16,567 INFO L186 Difference]: Start difference. First operand has 154 places, 136 transitions, 349 flow. Second operand 13 states and 1398 transitions. [2021-12-21 15:22:16,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 209 transitions, 805 flow [2021-12-21 15:22:16,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 209 transitions, 742 flow, removed 26 selfloop flow, removed 7 redundant places. [2021-12-21 15:22:16,577 INFO L242 Difference]: Finished difference. Result has 168 places, 153 transitions, 472 flow [2021-12-21 15:22:16,577 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=472, PETRI_PLACES=168, PETRI_TRANSITIONS=153} [2021-12-21 15:22:16,578 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 27 predicate places. [2021-12-21 15:22:16,578 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 153 transitions, 472 flow [2021-12-21 15:22:16,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2021-12-21 15:22:16,579 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:16,580 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:16,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:16,799 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,SelfDestructingSolverStorable3 [2021-12-21 15:22:16,800 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:16,800 INFO L85 PathProgramCache]: Analyzing trace with hash -17723278, now seen corresponding path program 3 times [2021-12-21 15:22:16,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:16,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624562361] [2021-12-21 15:22:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:16,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:17,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:17,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624562361] [2021-12-21 15:22:17,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624562361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:17,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624896900] [2021-12-21 15:22:17,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:22:17,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:17,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:17,651 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) [2021-12-21 15:22:17,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:22:17,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-12-21 15:22:17,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:22:17,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 15:22:17,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:18,184 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-21 15:22:18,185 INFO L387 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 51 treesize of output 17 [2021-12-21 15:22:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:22:18,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:22:18,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624896900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:22:18,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:22:18,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [26] total 34 [2021-12-21 15:22:18,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129559771] [2021-12-21 15:22:18,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:18,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:22:18,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:18,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:22:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 15:22:18,263 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2021-12-21 15:22:18,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 153 transitions, 472 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2021-12-21 15:22:18,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:18,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2021-12-21 15:22:18,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:18,766 INFO L129 PetriNetUnfolder]: 561/1325 cut-off events. [2021-12-21 15:22:18,767 INFO L130 PetriNetUnfolder]: For 1644/1709 co-relation queries the response was YES. [2021-12-21 15:22:18,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 1325 events. 561/1325 cut-off events. For 1644/1709 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7381 event pairs, 157 based on Foata normal form. 43/1296 useless extension candidates. Maximal degree in co-relation 3407. Up to 634 conditions per place. [2021-12-21 15:22:18,776 INFO L132 encePairwiseOnDemand]: 137/154 looper letters, 77 selfloop transitions, 25 changer transitions 36/228 dead transitions. [2021-12-21 15:22:18,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 228 transitions, 1015 flow [2021-12-21 15:22:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:22:18,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:22:18,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1398 transitions. [2021-12-21 15:22:18,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6983016983016983 [2021-12-21 15:22:18,780 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1398 transitions. [2021-12-21 15:22:18,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1398 transitions. [2021-12-21 15:22:18,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:18,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1398 transitions. [2021-12-21 15:22:18,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.53846153846153) internal successors, (1398), 13 states have internal predecessors, (1398), 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) [2021-12-21 15:22:18,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2021-12-21 15:22:18,785 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2021-12-21 15:22:18,785 INFO L186 Difference]: Start difference. First operand has 168 places, 153 transitions, 472 flow. Second operand 13 states and 1398 transitions. [2021-12-21 15:22:18,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 228 transitions, 1015 flow [2021-12-21 15:22:18,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 228 transitions, 969 flow, removed 23 selfloop flow, removed 6 redundant places. [2021-12-21 15:22:18,792 INFO L242 Difference]: Finished difference. Result has 179 places, 168 transitions, 641 flow [2021-12-21 15:22:18,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=641, PETRI_PLACES=179, PETRI_TRANSITIONS=168} [2021-12-21 15:22:18,792 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 38 predicate places. [2021-12-21 15:22:18,793 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 168 transitions, 641 flow [2021-12-21 15:22:18,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2021-12-21 15:22:18,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:18,794 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:18,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:19,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:19,007 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1021058128, now seen corresponding path program 4 times [2021-12-21 15:22:19,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:19,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565366114] [2021-12-21 15:22:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:19,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:20,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565366114] [2021-12-21 15:22:20,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565366114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093663814] [2021-12-21 15:22:20,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:22:20,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:20,304 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) [2021-12-21 15:22:20,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:22:20,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:22:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:22:20,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-21 15:22:20,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:21,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:22:21,538 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-21 15:22:21,850 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-21 15:22:21,850 INFO L387 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 51 treesize of output 17 [2021-12-21 15:22:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:21,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:22,817 INFO L353 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-12-21 15:22:22,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 155 [2021-12-21 15:22:22,848 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2021-12-21 15:22:22,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 68 [2021-12-21 15:22:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:26,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093663814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:22:26,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:22:26,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28, 28] total 80 [2021-12-21 15:22:26,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122269358] [2021-12-21 15:22:26,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:22:26,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-21 15:22:26,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:26,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-21 15:22:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=5994, Unknown=1, NotChecked=0, Total=6320 [2021-12-21 15:22:26,830 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 154 [2021-12-21 15:22:26,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 168 transitions, 641 flow. Second operand has 80 states, 80 states have (on average 71.35) internal successors, (5708), 80 states have internal predecessors, (5708), 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) [2021-12-21 15:22:26,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:26,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 154 [2021-12-21 15:22:26,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:37,670 INFO L129 PetriNetUnfolder]: 2116/4906 cut-off events. [2021-12-21 15:22:37,670 INFO L130 PetriNetUnfolder]: For 11825/11979 co-relation queries the response was YES. [2021-12-21 15:22:37,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14885 conditions, 4906 events. 2116/4906 cut-off events. For 11825/11979 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 38993 event pairs, 413 based on Foata normal form. 85/4780 useless extension candidates. Maximal degree in co-relation 14858. Up to 984 conditions per place. [2021-12-21 15:22:37,706 INFO L132 encePairwiseOnDemand]: 115/154 looper letters, 293 selfloop transitions, 135 changer transitions 86/576 dead transitions. [2021-12-21 15:22:37,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 576 transitions, 3760 flow [2021-12-21 15:22:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-21 15:22:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-21 15:22:37,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4848 transitions. [2021-12-21 15:22:37,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.49188311688311687 [2021-12-21 15:22:37,715 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4848 transitions. [2021-12-21 15:22:37,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4848 transitions. [2021-12-21 15:22:37,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:37,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4848 transitions. [2021-12-21 15:22:37,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 75.75) internal successors, (4848), 64 states have internal predecessors, (4848), 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) [2021-12-21 15:22:37,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 154.0) internal successors, (10010), 65 states have internal predecessors, (10010), 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) [2021-12-21 15:22:37,775 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 154.0) internal successors, (10010), 65 states have internal predecessors, (10010), 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) [2021-12-21 15:22:37,775 INFO L186 Difference]: Start difference. First operand has 179 places, 168 transitions, 641 flow. Second operand 64 states and 4848 transitions. [2021-12-21 15:22:37,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 576 transitions, 3760 flow [2021-12-21 15:22:37,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 576 transitions, 3562 flow, removed 99 selfloop flow, removed 6 redundant places. [2021-12-21 15:22:37,802 INFO L242 Difference]: Finished difference. Result has 265 places, 279 transitions, 1997 flow [2021-12-21 15:22:37,803 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=1997, PETRI_PLACES=265, PETRI_TRANSITIONS=279} [2021-12-21 15:22:37,805 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 124 predicate places. [2021-12-21 15:22:37,805 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 279 transitions, 1997 flow [2021-12-21 15:22:37,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 71.35) internal successors, (5708), 80 states have internal predecessors, (5708), 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) [2021-12-21 15:22:37,807 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:37,807 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:37,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:38,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:38,020 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1636682430, now seen corresponding path program 5 times [2021-12-21 15:22:38,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:38,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968767623] [2021-12-21 15:22:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:38,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:39,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:39,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968767623] [2021-12-21 15:22:39,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968767623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951090740] [2021-12-21 15:22:39,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 15:22:39,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:39,961 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) [2021-12-21 15:22:39,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:22:40,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-21 15:22:40,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:22:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-21 15:22:40,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:41,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:22:41,455 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-21 15:22:41,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:22:41,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:22:41,742 INFO L387 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2021-12-21 15:22:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:41,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:42,936 INFO L353 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-12-21 15:22:42,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 202 [2021-12-21 15:22:42,951 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-21 15:22:42,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 135 treesize of output 109 [2021-12-21 15:22:42,957 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-21 15:22:42,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 109 treesize of output 83 [2021-12-21 15:22:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:45,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951090740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:22:45,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:22:45,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 28] total 81 [2021-12-21 15:22:45,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171850174] [2021-12-21 15:22:45,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:22:45,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-21 15:22:45,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:45,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-21 15:22:45,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=6061, Unknown=19, NotChecked=0, Total=6480 [2021-12-21 15:22:45,468 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2021-12-21 15:22:45,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 279 transitions, 1997 flow. Second operand has 81 states, 81 states have (on average 69.49382716049382) internal successors, (5629), 81 states have internal predecessors, (5629), 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) [2021-12-21 15:22:45,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:45,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2021-12-21 15:22:45,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:59,239 INFO L129 PetriNetUnfolder]: 2532/6080 cut-off events. [2021-12-21 15:22:59,239 INFO L130 PetriNetUnfolder]: For 55625/56087 co-relation queries the response was YES. [2021-12-21 15:22:59,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26053 conditions, 6080 events. 2532/6080 cut-off events. For 55625/56087 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 52151 event pairs, 634 based on Foata normal form. 179/5983 useless extension candidates. Maximal degree in co-relation 25996. Up to 1381 conditions per place. [2021-12-21 15:22:59,310 INFO L132 encePairwiseOnDemand]: 112/154 looper letters, 288 selfloop transitions, 153 changer transitions 98/599 dead transitions. [2021-12-21 15:22:59,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 599 transitions, 5358 flow [2021-12-21 15:22:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-21 15:22:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-12-21 15:22:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4604 transitions. [2021-12-21 15:22:59,317 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4745413316841888 [2021-12-21 15:22:59,317 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4604 transitions. [2021-12-21 15:22:59,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4604 transitions. [2021-12-21 15:22:59,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:59,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4604 transitions. [2021-12-21 15:22:59,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 73.07936507936508) internal successors, (4604), 63 states have internal predecessors, (4604), 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) [2021-12-21 15:22:59,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 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) [2021-12-21 15:22:59,342 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 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) [2021-12-21 15:22:59,342 INFO L186 Difference]: Start difference. First operand has 265 places, 279 transitions, 1997 flow. Second operand 63 states and 4604 transitions. [2021-12-21 15:22:59,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 599 transitions, 5358 flow [2021-12-21 15:22:59,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 599 transitions, 4970 flow, removed 179 selfloop flow, removed 28 redundant places. [2021-12-21 15:22:59,533 INFO L242 Difference]: Finished difference. Result has 316 places, 328 transitions, 2931 flow [2021-12-21 15:22:59,534 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=2931, PETRI_PLACES=316, PETRI_TRANSITIONS=328} [2021-12-21 15:22:59,534 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 175 predicate places. [2021-12-21 15:22:59,535 INFO L470 AbstractCegarLoop]: Abstraction has has 316 places, 328 transitions, 2931 flow [2021-12-21 15:22:59,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 69.49382716049382) internal successors, (5629), 81 states have internal predecessors, (5629), 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) [2021-12-21 15:22:59,536 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:59,536 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:22:59,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:59,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:59,752 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:22:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash 861554898, now seen corresponding path program 6 times [2021-12-21 15:22:59,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:59,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459169284] [2021-12-21 15:22:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:59,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:01,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:01,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459169284] [2021-12-21 15:23:01,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459169284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:01,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116862624] [2021-12-21 15:23:01,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 15:23:01,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:01,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:01,271 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) [2021-12-21 15:23:01,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:23:01,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-12-21 15:23:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-21 15:23:01,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:02,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:23:02,083 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-21 15:23:02,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:23:02,171 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-21 15:23:02,432 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-21 15:23:02,432 INFO L387 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 51 treesize of output 17 [2021-12-21 15:23:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:23:02,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:23:02,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116862624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:02,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:23:02,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [34] total 51 [2021-12-21 15:23:02,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678509601] [2021-12-21 15:23:02,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:02,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 15:23:02,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:02,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 15:23:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2021-12-21 15:23:02,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 154 [2021-12-21 15:23:02,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 328 transitions, 2931 flow. Second operand has 21 states, 21 states have (on average 83.71428571428571) internal successors, (1758), 21 states have internal predecessors, (1758), 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) [2021-12-21 15:23:02,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:02,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 154 [2021-12-21 15:23:02,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:04,576 INFO L129 PetriNetUnfolder]: 2425/5901 cut-off events. [2021-12-21 15:23:04,576 INFO L130 PetriNetUnfolder]: For 68054/68512 co-relation queries the response was YES. [2021-12-21 15:23:04,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27151 conditions, 5901 events. 2425/5901 cut-off events. For 68054/68512 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 50232 event pairs, 555 based on Foata normal form. 209/5795 useless extension candidates. Maximal degree in co-relation 27077. Up to 2884 conditions per place. [2021-12-21 15:23:04,629 INFO L132 encePairwiseOnDemand]: 129/154 looper letters, 149 selfloop transitions, 129 changer transitions 38/399 dead transitions. [2021-12-21 15:23:04,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 399 transitions, 4181 flow [2021-12-21 15:23:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:23:04,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:23:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1919 transitions. [2021-12-21 15:23:04,632 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5664108618654073 [2021-12-21 15:23:04,632 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1919 transitions. [2021-12-21 15:23:04,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1919 transitions. [2021-12-21 15:23:04,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:04,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1919 transitions. [2021-12-21 15:23:04,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 87.22727272727273) internal successors, (1919), 22 states have internal predecessors, (1919), 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) [2021-12-21 15:23:04,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 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) [2021-12-21 15:23:04,638 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 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) [2021-12-21 15:23:04,638 INFO L186 Difference]: Start difference. First operand has 316 places, 328 transitions, 2931 flow. Second operand 22 states and 1919 transitions. [2021-12-21 15:23:04,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 399 transitions, 4181 flow [2021-12-21 15:23:04,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 399 transitions, 3974 flow, removed 78 selfloop flow, removed 41 redundant places. [2021-12-21 15:23:04,784 INFO L242 Difference]: Finished difference. Result has 286 places, 335 transitions, 3272 flow [2021-12-21 15:23:04,785 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3272, PETRI_PLACES=286, PETRI_TRANSITIONS=335} [2021-12-21 15:23:04,785 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 145 predicate places. [2021-12-21 15:23:04,785 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 335 transitions, 3272 flow [2021-12-21 15:23:04,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 83.71428571428571) internal successors, (1758), 21 states have internal predecessors, (1758), 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) [2021-12-21 15:23:04,786 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:04,786 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:04,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:04,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:04,988 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:04,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2140321802, now seen corresponding path program 7 times [2021-12-21 15:23:04,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:04,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349629684] [2021-12-21 15:23:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:04,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:06,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:06,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349629684] [2021-12-21 15:23:06,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349629684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:06,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111611517] [2021-12-21 15:23:06,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 15:23:06,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:06,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:06,488 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) [2021-12-21 15:23:06,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:23:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:06,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-21 15:23:06,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:07,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:23:07,750 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-21 15:23:08,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:23:08,253 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-21 15:23:08,706 INFO L353 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2021-12-21 15:23:08,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 23 [2021-12-21 15:23:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:08,823 INFO L328 TraceCheckSpWp]: Computing backward predicates...