./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe012_tso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe012_tso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 27779e81c0fa7ebfefcaf756900ad8a5caf59b29 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:27:09,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:27:09,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:27:09,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:27:09,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:27:09,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:27:09,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:27:09,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:27:09,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:27:09,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:27:09,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:27:09,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:27:09,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:27:09,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:27:09,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:27:09,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:27:09,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:27:09,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:27:09,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:27:09,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:27:09,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:27:09,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:27:09,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:27:09,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:27:09,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:27:09,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:27:09,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:27:09,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:27:09,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:27:09,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:27:09,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:27:09,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:27:09,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:27:09,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:27:09,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:27:09,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:27:09,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:27:09,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:27:09,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:27:09,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:27:09,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:27:09,760 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:27:09,807 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:27:09,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:27:09,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:27:09,809 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:27:09,810 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:27:09,810 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:27:09,810 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:27:09,811 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:27:09,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:27:09,811 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:27:09,812 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:27:09,813 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:27:09,813 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:27:09,813 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:27:09,813 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:27:09,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:27:09,815 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:27:09,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:27:09,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:27:09,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:27:09,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:27:09,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:27:09,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:27:09,816 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:27:09,817 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:27:09,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:27:09,817 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:27:09,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:27:09,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:27:09,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:27:09,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:27:09,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:27:09,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:27:09,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:27:09,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:27:09,821 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:27:09,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:27:09,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:27:09,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:27:09,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:27:09,823 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27779e81c0fa7ebfefcaf756900ad8a5caf59b29 [2020-11-28 07:27:10,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:27:10,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:27:10,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:27:10,239 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:27:10,240 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:27:10,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe012_tso.opt.i [2020-11-28 07:27:10,325 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/data/8c67df207/d49c55d30c5345b1960b6007fd865ecd/FLAG40f7eb26d [2020-11-28 07:27:10,899 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:27:10,901 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/sv-benchmarks/c/pthread-wmm/safe012_tso.opt.i [2020-11-28 07:27:10,916 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/data/8c67df207/d49c55d30c5345b1960b6007fd865ecd/FLAG40f7eb26d [2020-11-28 07:27:11,193 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/data/8c67df207/d49c55d30c5345b1960b6007fd865ecd [2020-11-28 07:27:11,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:27:11,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:27:11,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:27:11,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:27:11,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:27:11,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2064f5dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11, skipping insertion in model container [2020-11-28 07:27:11,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:27:11,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:27:11,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:27:11,681 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:27:11,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:27:11,819 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:27:11,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11 WrapperNode [2020-11-28 07:27:11,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:27:11,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:27:11,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:27:11,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:27:11,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:27:11,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:27:11,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:27:11,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:27:11,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:27:11,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:27:11,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:27:11,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:27:11,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:27:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:27:12,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-28 07:27:12,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:27:12,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:27:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-28 07:27:12,027 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-28 07:27:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-28 07:27:12,027 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-28 07:27:12,029 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-11-28 07:27:12,030 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-11-28 07:27:12,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:27:12,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-28 07:27:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:27:12,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:27:12,033 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-28 07:27:12,651 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:27:12,653 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-28 07:27:12,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:27:12 BoogieIcfgContainer [2020-11-28 07:27:12,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:27:12,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:27:12,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:27:12,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:27:12,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:27:11" (1/3) ... [2020-11-28 07:27:12,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61058f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:27:12, skipping insertion in model container [2020-11-28 07:27:12,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (2/3) ... [2020-11-28 07:27:12,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61058f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:27:12, skipping insertion in model container [2020-11-28 07:27:12,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:27:12" (3/3) ... [2020-11-28 07:27:12,668 INFO L111 eAbstractionObserver]: Analyzing ICFG safe012_tso.opt.i [2020-11-28 07:27:12,681 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-28 07:27:12,681 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:27:12,687 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:27:12,688 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-28 07:27:12,727 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,728 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,728 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,728 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,729 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,729 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,730 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,730 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,730 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,730 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,731 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,731 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,732 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,732 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,733 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,734 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,735 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,736 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,746 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,746 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,746 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,746 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,757 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,757 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,757 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,758 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,761 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,762 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,762 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,762 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:27:12,765 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-28 07:27:12,783 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-28 07:27:12,821 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:27:12,822 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:27:12,822 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:27:12,822 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:27:12,822 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:27:12,823 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:27:12,823 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:27:12,823 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:27:12,841 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-28 07:27:12,844 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 80 transitions, 175 flow [2020-11-28 07:27:12,848 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 80 transitions, 175 flow [2020-11-28 07:27:12,850 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 87 places, 80 transitions, 175 flow [2020-11-28 07:27:12,928 INFO L129 PetriNetUnfolder]: 3/77 cut-off events. [2020-11-28 07:27:12,928 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-28 07:27:12,934 INFO L80 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 3/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2020-11-28 07:27:12,940 INFO L116 LiptonReduction]: Number of co-enabled transitions 1440 [2020-11-28 07:27:14,295 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-28 07:27:15,029 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-28 07:27:15,584 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-11-28 07:27:16,263 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-11-28 07:27:16,383 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-11-28 07:27:16,522 INFO L131 LiptonReduction]: Checked pairs total: 2810 [2020-11-28 07:27:16,522 INFO L133 LiptonReduction]: Total number of compositions: 73 [2020-11-28 07:27:16,527 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2020-11-28 07:27:16,551 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 298 states. [2020-11-28 07:27:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states. [2020-11-28 07:27:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:27:16,559 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:16,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:16,560 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash -853874994, now seen corresponding path program 1 times [2020-11-28 07:27:16,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:16,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145239004] [2020-11-28 07:27:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:16,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145239004] [2020-11-28 07:27:16,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:16,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:27:16,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838684816] [2020-11-28 07:27:16,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:16,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:16,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:16,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:16,886 INFO L87 Difference]: Start difference. First operand 298 states. Second operand 3 states. [2020-11-28 07:27:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:16,934 INFO L93 Difference]: Finished difference Result 282 states and 808 transitions. [2020-11-28 07:27:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:16,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-28 07:27:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:16,951 INFO L225 Difference]: With dead ends: 282 [2020-11-28 07:27:16,951 INFO L226 Difference]: Without dead ends: 218 [2020-11-28 07:27:16,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-11-28 07:27:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-11-28 07:27:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-11-28 07:27:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 600 transitions. [2020-11-28 07:27:17,049 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 600 transitions. Word has length 8 [2020-11-28 07:27:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:17,050 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 600 transitions. [2020-11-28 07:27:17,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 600 transitions. [2020-11-28 07:27:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:27:17,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:17,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:17,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:27:17,059 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:17,062 INFO L82 PathProgramCache]: Analyzing trace with hash -700352928, now seen corresponding path program 1 times [2020-11-28 07:27:17,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:17,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246995506] [2020-11-28 07:27:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:17,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246995506] [2020-11-28 07:27:17,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:17,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:27:17,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878152499] [2020-11-28 07:27:17,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:27:17,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:27:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:17,134 INFO L87 Difference]: Start difference. First operand 218 states and 600 transitions. Second operand 4 states. [2020-11-28 07:27:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:17,201 INFO L93 Difference]: Finished difference Result 242 states and 634 transitions. [2020-11-28 07:27:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:27:17,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-28 07:27:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:17,204 INFO L225 Difference]: With dead ends: 242 [2020-11-28 07:27:17,204 INFO L226 Difference]: Without dead ends: 146 [2020-11-28 07:27:17,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:27:17,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-28 07:27:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-11-28 07:27:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-28 07:27:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-11-28 07:27:17,216 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 9 [2020-11-28 07:27:17,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:17,216 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-11-28 07:27:17,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:27:17,216 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-11-28 07:27:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:27:17,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:17,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:17,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:27:17,218 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2063010818, now seen corresponding path program 1 times [2020-11-28 07:27:17,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:17,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882703523] [2020-11-28 07:27:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:17,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882703523] [2020-11-28 07:27:17,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:17,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:27:17,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979969263] [2020-11-28 07:27:17,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:17,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:17,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:17,304 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 3 states. [2020-11-28 07:27:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:17,312 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-11-28 07:27:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:17,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-28 07:27:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:17,315 INFO L225 Difference]: With dead ends: 140 [2020-11-28 07:27:17,315 INFO L226 Difference]: Without dead ends: 140 [2020-11-28 07:27:17,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:17,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-11-28 07:27:17,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-11-28 07:27:17,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-28 07:27:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 343 transitions. [2020-11-28 07:27:17,323 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 343 transitions. Word has length 11 [2020-11-28 07:27:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:17,323 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 343 transitions. [2020-11-28 07:27:17,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 343 transitions. [2020-11-28 07:27:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:27:17,331 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:17,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:17,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:27:17,332 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:17,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1374781277, now seen corresponding path program 1 times [2020-11-28 07:27:17,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:17,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839773636] [2020-11-28 07:27:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:17,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839773636] [2020-11-28 07:27:17,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:17,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:27:17,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986833266] [2020-11-28 07:27:17,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:27:17,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:17,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:27:17,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:17,415 INFO L87 Difference]: Start difference. First operand 140 states and 343 transitions. Second operand 4 states. [2020-11-28 07:27:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:17,447 INFO L93 Difference]: Finished difference Result 158 states and 376 transitions. [2020-11-28 07:27:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:27:17,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 07:27:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:17,449 INFO L225 Difference]: With dead ends: 158 [2020-11-28 07:27:17,449 INFO L226 Difference]: Without dead ends: 68 [2020-11-28 07:27:17,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:27:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-28 07:27:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-28 07:27:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-28 07:27:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 144 transitions. [2020-11-28 07:27:17,454 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 144 transitions. Word has length 12 [2020-11-28 07:27:17,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:17,454 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 144 transitions. [2020-11-28 07:27:17,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:27:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 144 transitions. [2020-11-28 07:27:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:27:17,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:17,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:17,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:27:17,456 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:17,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1721558133, now seen corresponding path program 1 times [2020-11-28 07:27:17,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:17,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796027545] [2020-11-28 07:27:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:17,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796027545] [2020-11-28 07:27:17,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:17,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:27:17,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764414263] [2020-11-28 07:27:17,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:27:17,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:27:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:17,584 INFO L87 Difference]: Start difference. First operand 68 states and 144 transitions. Second operand 4 states. [2020-11-28 07:27:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:17,629 INFO L93 Difference]: Finished difference Result 81 states and 157 transitions. [2020-11-28 07:27:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:27:17,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-28 07:27:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:17,630 INFO L225 Difference]: With dead ends: 81 [2020-11-28 07:27:17,630 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 07:27:17,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:27:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 07:27:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-28 07:27:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-28 07:27:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 114 transitions. [2020-11-28 07:27:17,635 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 114 transitions. Word has length 13 [2020-11-28 07:27:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:17,635 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 114 transitions. [2020-11-28 07:27:17,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:27:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 114 transitions. [2020-11-28 07:27:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:27:17,636 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:17,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:17,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:27:17,637 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:17,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1881599875, now seen corresponding path program 1 times [2020-11-28 07:27:17,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:17,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825776183] [2020-11-28 07:27:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:17,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825776183] [2020-11-28 07:27:17,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:17,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:27:17,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671119298] [2020-11-28 07:27:17,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:27:17,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:17,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:27:17,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:27:17,759 INFO L87 Difference]: Start difference. First operand 59 states and 114 transitions. Second operand 5 states. [2020-11-28 07:27:17,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:17,830 INFO L93 Difference]: Finished difference Result 60 states and 104 transitions. [2020-11-28 07:27:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:27:17,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-28 07:27:17,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:17,831 INFO L225 Difference]: With dead ends: 60 [2020-11-28 07:27:17,832 INFO L226 Difference]: Without dead ends: 45 [2020-11-28 07:27:17,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:27:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-28 07:27:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-28 07:27:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 07:27:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 74 transitions. [2020-11-28 07:27:17,835 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 74 transitions. Word has length 14 [2020-11-28 07:27:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:17,836 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 74 transitions. [2020-11-28 07:27:17,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:27:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 74 transitions. [2020-11-28 07:27:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:27:17,840 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:17,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:17,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:27:17,841 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:17,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1799830367, now seen corresponding path program 1 times [2020-11-28 07:27:17,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:17,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923361141] [2020-11-28 07:27:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:17,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923361141] [2020-11-28 07:27:17,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:17,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:27:17,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063707336] [2020-11-28 07:27:17,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:27:17,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:17,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:27:17,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:27:17,954 INFO L87 Difference]: Start difference. First operand 45 states and 74 transitions. Second operand 6 states. [2020-11-28 07:27:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:18,041 INFO L93 Difference]: Finished difference Result 42 states and 66 transitions. [2020-11-28 07:27:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:27:18,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-28 07:27:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:18,042 INFO L225 Difference]: With dead ends: 42 [2020-11-28 07:27:18,043 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 07:27:18,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:27:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 07:27:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-28 07:27:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 07:27:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 56 transitions. [2020-11-28 07:27:18,045 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 56 transitions. Word has length 15 [2020-11-28 07:27:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:18,046 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 56 transitions. [2020-11-28 07:27:18,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:27:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 56 transitions. [2020-11-28 07:27:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 07:27:18,046 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:18,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:18,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:27:18,047 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:18,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1269131745, now seen corresponding path program 1 times [2020-11-28 07:27:18,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:18,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602349814] [2020-11-28 07:27:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:18,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602349814] [2020-11-28 07:27:18,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:18,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:27:18,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842014912] [2020-11-28 07:27:18,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:27:18,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:18,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:27:18,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:18,096 INFO L87 Difference]: Start difference. First operand 36 states and 56 transitions. Second operand 4 states. [2020-11-28 07:27:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:18,118 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2020-11-28 07:27:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:27:18,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-28 07:27:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:18,119 INFO L225 Difference]: With dead ends: 35 [2020-11-28 07:27:18,119 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:27:18,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:27:18,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:27:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:27:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:27:18,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:27:18,120 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-28 07:27:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:18,120 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:27:18,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:27:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:27:18,121 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:27:18,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:27:18,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:27:18 BasicIcfg [2020-11-28 07:27:18,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:27:18,124 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:27:18,124 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:27:18,125 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:27:18,125 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:27:12" (3/4) ... [2020-11-28 07:27:18,131 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:27:18,138 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-11-28 07:27:18,138 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-11-28 07:27:18,156 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-11-28 07:27:18,162 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-28 07:27:18,162 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 07:27:18,163 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:27:18,163 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:27:18,227 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_782bcd61-e066-4bd0-babd-064e0d402116/bin/utaipan/witness.graphml [2020-11-28 07:27:18,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:27:18,228 INFO L168 Benchmark]: Toolchain (without parser) took 7030.86 ms. Allocated memory was 92.3 MB in the beginning and 136.3 MB in the end (delta: 44.0 MB). Free memory was 63.5 MB in the beginning and 110.4 MB in the end (delta: -46.9 MB). Peak memory consumption was 70.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:18,229 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:27:18,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 621.32 ms. Allocated memory is still 92.3 MB. Free memory was 63.3 MB in the beginning and 49.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:18,230 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.70 ms. Allocated memory is still 92.3 MB. Free memory was 49.3 MB in the beginning and 47.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:18,230 INFO L168 Benchmark]: Boogie Preprocessor took 33.37 ms. Allocated memory is still 92.3 MB. Free memory was 47.6 MB in the beginning and 46.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:27:18,230 INFO L168 Benchmark]: RCFGBuilder took 746.91 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 46.0 MB in the beginning and 72.8 MB in the end (delta: -26.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:18,231 INFO L168 Benchmark]: TraceAbstraction took 5464.06 ms. Allocated memory was 111.1 MB in the beginning and 136.3 MB in the end (delta: 25.2 MB). Free memory was 72.0 MB in the beginning and 38.6 MB in the end (delta: 33.4 MB). Peak memory consumption was 58.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:18,231 INFO L168 Benchmark]: Witness Printer took 102.62 ms. Allocated memory is still 136.3 MB. Free memory was 38.6 MB in the beginning and 110.4 MB in the end (delta: -71.8 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:18,234 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 621.32 ms. Allocated memory is still 92.3 MB. Free memory was 63.3 MB in the beginning and 49.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.70 ms. Allocated memory is still 92.3 MB. Free memory was 49.3 MB in the beginning and 47.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.37 ms. Allocated memory is still 92.3 MB. Free memory was 47.6 MB in the beginning and 46.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 746.91 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 46.0 MB in the beginning and 72.8 MB in the end (delta: -26.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5464.06 ms. Allocated memory was 111.1 MB in the beginning and 136.3 MB in the end (delta: 25.2 MB). Free memory was 72.0 MB in the beginning and 38.6 MB in the end (delta: 33.4 MB). Peak memory consumption was 58.3 MB. Max. memory is 16.1 GB. * Witness Printer took 102.62 ms. Allocated memory is still 136.3 MB. Free memory was 38.6 MB in the beginning and 110.4 MB in the end (delta: -71.8 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1064 VarBasedMoverChecksPositive, 47 VarBasedMoverChecksNegative, 10 SemBasedMoverChecksPositive, 37 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.5s, 90 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.6s, 87 PlacesBefore, 31 PlacesAfterwards, 80 TransitionsBefore, 22 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 73 TotalNumberOfCompositions, 2810 MoverChecksTotal - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 78 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 136 SDtfs, 121 SDslu, 149 SDs, 0 SdLazy, 97 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 3169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...