./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/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 39211c46f4aae13996ba33c19e2c7157964c8aaa ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:35:15,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:35:15,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:35:15,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:35:15,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:35:15,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:35:15,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:35:15,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:35:15,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:35:15,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:35:15,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:35:15,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:35:15,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:35:15,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:35:15,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:35:15,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:35:15,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:35:15,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:35:15,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:35:15,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:35:15,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:35:15,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:35:15,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:35:15,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:35:15,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:35:15,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:35:15,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:35:15,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:35:15,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:35:15,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:35:15,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:35:15,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:35:15,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:35:15,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:35:15,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:35:15,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:35:15,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:35:15,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:35:15,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:35:15,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:35:15,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:35:15,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-03 12:35:15,940 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:35:15,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:35:15,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:35:15,942 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:35:15,942 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:35:15,942 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:35:15,943 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:35:15,943 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:35:15,943 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:35:15,943 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:35:15,944 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:35:15,945 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:35:15,945 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:35:15,945 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:35:15,945 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:35:15,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:35:15,946 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:35:15,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:35:15,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:35:15,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:35:15,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:35:15,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:35:15,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:35:15,948 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:35:15,948 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:35:15,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:35:15,948 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:35:15,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:35:15,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:35:15,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:35:15,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:35:15,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:35:15,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:35:15,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:35:15,950 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:35:15,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:35:15,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:35:15,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:35:15,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:35:15,951 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_0c80fc74-b13a-4fdc-bc13-20558edf2879/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39211c46f4aae13996ba33c19e2c7157964c8aaa [2020-12-03 12:35:16,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:35:16,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:35:16,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:35:16,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:35:16,319 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:35:16,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/../../sv-benchmarks/c/pthread/triangular-2.i [2020-12-03 12:35:16,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/data/9e6ff99b2/52bdba408c5f4b1e8ae5dadd8c0ef16c/FLAGb043938b3 [2020-12-03 12:35:17,149 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:35:17,153 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/sv-benchmarks/c/pthread/triangular-2.i [2020-12-03 12:35:17,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/data/9e6ff99b2/52bdba408c5f4b1e8ae5dadd8c0ef16c/FLAGb043938b3 [2020-12-03 12:35:17,358 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/data/9e6ff99b2/52bdba408c5f4b1e8ae5dadd8c0ef16c [2020-12-03 12:35:17,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:35:17,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:35:17,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:17,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:35:17,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:35:17,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:17" (1/1) ... [2020-12-03 12:35:17,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@285772cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:17, skipping insertion in model container [2020-12-03 12:35:17,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:17" (1/1) ... [2020-12-03 12:35:17,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:35:17,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:35:17,957 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/sv-benchmarks/c/pthread/triangular-2.i[30952,30965] [2020-12-03 12:35:17,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:17,972 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:35:18,038 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/sv-benchmarks/c/pthread/triangular-2.i[30952,30965] [2020-12-03 12:35:18,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:18,137 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:35:18,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18 WrapperNode [2020-12-03 12:35:18,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:18,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:18,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:35:18,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:35:18,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (1/1) ... [2020-12-03 12:35:18,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (1/1) ... [2020-12-03 12:35:18,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:18,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:35:18,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:35:18,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:35:18,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (1/1) ... [2020-12-03 12:35:18,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (1/1) ... [2020-12-03 12:35:18,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (1/1) ... [2020-12-03 12:35:18,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (1/1) ... [2020-12-03 12:35:18,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (1/1) ... [2020-12-03 12:35:18,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (1/1) ... [2020-12-03 12:35:18,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (1/1) ... [2020-12-03 12:35:18,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:35:18,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:35:18,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:35:18,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:35:18,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/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 [2020-12-03 12:35:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-03 12:35:18,348 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-03 12:35:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-03 12:35:18,349 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-03 12:35:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:35:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-03 12:35:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:35:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:35:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:35:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-03 12:35:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:35:18,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:35:18,353 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-03 12:35:18,805 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:35:18,806 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-03 12:35:18,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:18 BoogieIcfgContainer [2020-12-03 12:35:18,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:35:18,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:35:18,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:35:18,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:35:18,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:35:17" (1/3) ... [2020-12-03 12:35:18,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f365fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:18, skipping insertion in model container [2020-12-03 12:35:18,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:18" (2/3) ... [2020-12-03 12:35:18,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f365fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:18, skipping insertion in model container [2020-12-03 12:35:18,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:18" (3/3) ... [2020-12-03 12:35:18,817 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-12-03 12:35:18,833 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-03 12:35:18,833 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:35:18,836 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 12:35:18,837 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-03 12:35:18,897 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,898 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,898 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,898 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,898 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,898 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,899 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,928 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,929 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,929 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,930 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,930 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,930 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,930 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,930 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,931 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,931 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,931 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,932 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,932 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,932 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,932 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,932 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,932 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,933 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,933 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,933 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,933 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,933 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,934 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,934 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,934 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,934 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,934 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,934 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,934 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,935 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,936 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,937 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,937 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,937 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,937 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,937 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,947 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,947 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,947 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,948 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,948 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,948 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:18,952 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-03 12:35:18,964 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-03 12:35:18,994 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:35:18,994 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:35:18,994 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:35:18,995 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:35:18,995 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:35:18,995 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:35:18,995 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:35:18,995 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:35:19,006 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-03 12:35:19,008 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-03 12:35:19,011 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-03 12:35:19,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 60 transitions, 130 flow [2020-12-03 12:35:19,050 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-12-03 12:35:19,050 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-03 12:35:19,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2020-12-03 12:35:19,056 INFO L116 LiptonReduction]: Number of co-enabled transitions 968 [2020-12-03 12:35:21,476 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-03 12:35:22,078 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-03 12:35:22,208 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-03 12:35:22,464 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-03 12:35:22,570 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-03 12:35:22,613 INFO L131 LiptonReduction]: Checked pairs total: 998 [2020-12-03 12:35:22,614 INFO L133 LiptonReduction]: Total number of compositions: 52 [2020-12-03 12:35:22,621 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-03 12:35:22,632 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-03 12:35:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-03 12:35:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:35:22,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:22,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:35:22,641 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:22,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:22,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1332860337, now seen corresponding path program 1 times [2020-12-03 12:35:22,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:22,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763414874] [2020-12-03 12:35:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:22,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763414874] [2020-12-03 12:35:22,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:22,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:22,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914593324] [2020-12-03 12:35:22,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:22,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:22,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:22,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:22,973 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-03 12:35:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:23,041 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-12-03 12:35:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:35:23,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-03 12:35:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:23,055 INFO L225 Difference]: With dead ends: 83 [2020-12-03 12:35:23,055 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 12:35:23,056 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 [2020-12-03 12:35:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 12:35:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-03 12:35:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-03 12:35:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-12-03 12:35:23,110 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-12-03 12:35:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:23,111 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-12-03 12:35:23,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-12-03 12:35:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:35:23,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:23,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:23,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:35:23,114 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:23,119 INFO L82 PathProgramCache]: Analyzing trace with hash -978539367, now seen corresponding path program 1 times [2020-12-03 12:35:23,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:23,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686141435] [2020-12-03 12:35:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:23,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686141435] [2020-12-03 12:35:23,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:23,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:23,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699183631] [2020-12-03 12:35:23,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:35:23,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:23,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:35:23,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:23,270 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-12-03 12:35:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:23,324 INFO L93 Difference]: Finished difference Result 86 states and 200 transitions. [2020-12-03 12:35:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:35:23,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-03 12:35:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:23,332 INFO L225 Difference]: With dead ends: 86 [2020-12-03 12:35:23,335 INFO L226 Difference]: Without dead ends: 78 [2020-12-03 12:35:23,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-03 12:35:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2020-12-03 12:35:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-03 12:35:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-12-03 12:35:23,362 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 8 [2020-12-03 12:35:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:23,362 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-12-03 12:35:23,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:35:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-12-03 12:35:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:35:23,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:23,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:23,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:35:23,368 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash -978459387, now seen corresponding path program 2 times [2020-12-03 12:35:23,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:23,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747062216] [2020-12-03 12:35:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:23,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747062216] [2020-12-03 12:35:23,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:23,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:23,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554567332] [2020-12-03 12:35:23,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:35:23,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:23,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:35:23,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:23,475 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 5 states. [2020-12-03 12:35:23,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:23,526 INFO L93 Difference]: Finished difference Result 62 states and 143 transitions. [2020-12-03 12:35:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:35:23,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-03 12:35:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:23,527 INFO L225 Difference]: With dead ends: 62 [2020-12-03 12:35:23,528 INFO L226 Difference]: Without dead ends: 50 [2020-12-03 12:35:23,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:35:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-03 12:35:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-03 12:35:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-03 12:35:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-12-03 12:35:23,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 8 [2020-12-03 12:35:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:23,535 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-12-03 12:35:23,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:35:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-12-03 12:35:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:35:23,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:23,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:23,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:35:23,537 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:23,538 INFO L82 PathProgramCache]: Analyzing trace with hash -978842826, now seen corresponding path program 1 times [2020-12-03 12:35:23,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:23,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697833525] [2020-12-03 12:35:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:23,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697833525] [2020-12-03 12:35:23,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:23,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:23,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616873346] [2020-12-03 12:35:23,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:35:23,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:23,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:35:23,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:23,631 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-12-03 12:35:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:23,684 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-12-03 12:35:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:23,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-03 12:35:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:23,687 INFO L225 Difference]: With dead ends: 56 [2020-12-03 12:35:23,687 INFO L226 Difference]: Without dead ends: 50 [2020-12-03 12:35:23,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:35:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-03 12:35:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-03 12:35:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-03 12:35:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-12-03 12:35:23,696 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-12-03 12:35:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:23,696 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-12-03 12:35:23,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:35:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-12-03 12:35:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:23,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:23,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:23,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:35:23,697 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:23,697 INFO L82 PathProgramCache]: Analyzing trace with hash 220478720, now seen corresponding path program 1 times [2020-12-03 12:35:23,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:23,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13799772] [2020-12-03 12:35:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:23,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13799772] [2020-12-03 12:35:23,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:23,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:35:23,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456929709] [2020-12-03 12:35:23,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:23,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:23,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:23,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:23,769 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-12-03 12:35:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:23,846 INFO L93 Difference]: Finished difference Result 58 states and 132 transitions. [2020-12-03 12:35:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:35:23,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:35:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:23,847 INFO L225 Difference]: With dead ends: 58 [2020-12-03 12:35:23,847 INFO L226 Difference]: Without dead ends: 51 [2020-12-03 12:35:23,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:35:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-03 12:35:23,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-12-03 12:35:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-03 12:35:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-12-03 12:35:23,852 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 10 [2020-12-03 12:35:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:23,853 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-12-03 12:35:23,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-12-03 12:35:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:23,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:23,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:23,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-03 12:35:23,854 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:23,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:23,855 INFO L82 PathProgramCache]: Analyzing trace with hash 266866190, now seen corresponding path program 2 times [2020-12-03 12:35:23,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:23,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229105401] [2020-12-03 12:35:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:23,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229105401] [2020-12-03 12:35:23,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:23,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:35:23,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959582283] [2020-12-03 12:35:23,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:23,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:23,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:23,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:23,938 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 6 states. [2020-12-03 12:35:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:24,034 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-12-03 12:35:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 12:35:24,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:35:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:24,036 INFO L225 Difference]: With dead ends: 78 [2020-12-03 12:35:24,036 INFO L226 Difference]: Without dead ends: 71 [2020-12-03 12:35:24,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:35:24,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-03 12:35:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-12-03 12:35:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-03 12:35:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-12-03 12:35:24,055 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-12-03 12:35:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:24,056 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-12-03 12:35:24,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-12-03 12:35:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:24,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:24,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:24,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-03 12:35:24,058 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:24,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:24,059 INFO L82 PathProgramCache]: Analyzing trace with hash 266888510, now seen corresponding path program 3 times [2020-12-03 12:35:24,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:24,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865562629] [2020-12-03 12:35:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865562629] [2020-12-03 12:35:24,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:24,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:35:24,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518051865] [2020-12-03 12:35:24,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:24,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:24,142 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-12-03 12:35:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:24,229 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-12-03 12:35:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:35:24,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:35:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:24,231 INFO L225 Difference]: With dead ends: 54 [2020-12-03 12:35:24,231 INFO L226 Difference]: Without dead ends: 43 [2020-12-03 12:35:24,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:35:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-03 12:35:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-12-03 12:35:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-03 12:35:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-12-03 12:35:24,244 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-12-03 12:35:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:24,244 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-12-03 12:35:24,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-12-03 12:35:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:24,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:24,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:24,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-03 12:35:24,250 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash 266773190, now seen corresponding path program 4 times [2020-12-03 12:35:24,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:24,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324373100] [2020-12-03 12:35:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324373100] [2020-12-03 12:35:24,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:24,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:35:24,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040699713] [2020-12-03 12:35:24,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:24,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:24,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:24,354 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-12-03 12:35:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:24,494 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-12-03 12:35:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:35:24,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:35:24,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:24,495 INFO L225 Difference]: With dead ends: 55 [2020-12-03 12:35:24,495 INFO L226 Difference]: Without dead ends: 49 [2020-12-03 12:35:24,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:35:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-03 12:35:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-12-03 12:35:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-03 12:35:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-12-03 12:35:24,505 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-12-03 12:35:24,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:24,505 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-12-03 12:35:24,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:24,506 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-12-03 12:35:24,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 12:35:24,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:24,506 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:24,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-03 12:35:24,507 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1755209235, now seen corresponding path program 5 times [2020-12-03 12:35:24,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:24,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145329381] [2020-12-03 12:35:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145329381] [2020-12-03 12:35:24,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569923518] [2020-12-03 12:35:24,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:24,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-03 12:35:24,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:35:24,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-03 12:35:24,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:24,840 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:35:24,840 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:24,862 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:24,893 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:24,911 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100302123] [2020-12-03 12:35:24,956 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:380) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:35:24,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:24,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-03 12:35:24,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501857971] [2020-12-03 12:35:24,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:35:24,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:24,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:35:24,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:35:24,967 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 12 states. [2020-12-03 12:35:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:25,173 INFO L93 Difference]: Finished difference Result 71 states and 159 transitions. [2020-12-03 12:35:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 12:35:25,174 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-03 12:35:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:25,175 INFO L225 Difference]: With dead ends: 71 [2020-12-03 12:35:25,175 INFO L226 Difference]: Without dead ends: 53 [2020-12-03 12:35:25,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-12-03 12:35:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-03 12:35:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-12-03 12:35:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 12:35:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 115 transitions. [2020-12-03 12:35:25,180 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 115 transitions. Word has length 11 [2020-12-03 12:35:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:25,180 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 115 transitions. [2020-12-03 12:35:25,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:35:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 115 transitions. [2020-12-03 12:35:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 12:35:25,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:25,181 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:25,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-03 12:35:25,406 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:25,407 INFO L82 PathProgramCache]: Analyzing trace with hash -316364261, now seen corresponding path program 6 times [2020-12-03 12:35:25,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:25,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807978520] [2020-12-03 12:35:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:25,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807978520] [2020-12-03 12:35:25,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929762957] [2020-12-03 12:35:25,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:25,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:35:25,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:35:25,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-03 12:35:25,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:25,623 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 12:35:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:25,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:25,650 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:35:25,651 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:25,662 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:25,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002734620] [2020-12-03 12:35:25,718 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:380) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:35:25,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:25,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-03 12:35:25,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182408150] [2020-12-03 12:35:25,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:35:25,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:25,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:35:25,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:35:25,724 INFO L87 Difference]: Start difference. First operand 49 states and 115 transitions. Second operand 12 states. [2020-12-03 12:35:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:25,958 INFO L93 Difference]: Finished difference Result 89 states and 211 transitions. [2020-12-03 12:35:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-03 12:35:25,958 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-03 12:35:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:25,959 INFO L225 Difference]: With dead ends: 89 [2020-12-03 12:35:25,959 INFO L226 Difference]: Without dead ends: 64 [2020-12-03 12:35:25,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-12-03 12:35:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-03 12:35:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2020-12-03 12:35:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-03 12:35:25,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 128 transitions. [2020-12-03 12:35:25,965 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 128 transitions. Word has length 11 [2020-12-03 12:35:25,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:25,965 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 128 transitions. [2020-12-03 12:35:25,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:35:25,965 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 128 transitions. [2020-12-03 12:35:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:35:25,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:25,968 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:26,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-03 12:35:26,194 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:26,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1554804726, now seen corresponding path program 7 times [2020-12-03 12:35:26,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:26,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105441178] [2020-12-03 12:35:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:26,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105441178] [2020-12-03 12:35:26,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864974775] [2020-12-03 12:35:26,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 12:35:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:26,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:26,418 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:35:26,418 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:26,436 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:26,456 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:26,477 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:26,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315275003] [2020-12-03 12:35:26,542 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:380) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:35:26,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:26,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2020-12-03 12:35:26,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338458864] [2020-12-03 12:35:26,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-03 12:35:26,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:26,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-03 12:35:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:35:26,546 INFO L87 Difference]: Start difference. First operand 54 states and 128 transitions. Second operand 16 states. [2020-12-03 12:35:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:26,915 INFO L93 Difference]: Finished difference Result 148 states and 331 transitions. [2020-12-03 12:35:26,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-03 12:35:26,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-12-03 12:35:26,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:26,917 INFO L225 Difference]: With dead ends: 148 [2020-12-03 12:35:26,917 INFO L226 Difference]: Without dead ends: 121 [2020-12-03 12:35:26,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=799, Unknown=0, NotChecked=0, Total=1122 [2020-12-03 12:35:26,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-03 12:35:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 69. [2020-12-03 12:35:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-03 12:35:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-12-03 12:35:26,929 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 14 [2020-12-03 12:35:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:26,930 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-12-03 12:35:26,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-03 12:35:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-12-03 12:35:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:35:26,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:26,933 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:27,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-03 12:35:27,150 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:27,150 INFO L82 PathProgramCache]: Analyzing trace with hash -867590526, now seen corresponding path program 8 times [2020-12-03 12:35:27,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:27,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400862384] [2020-12-03 12:35:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:27,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400862384] [2020-12-03 12:35:27,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608241882] [2020-12-03 12:35:27,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:27,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-03 12:35:27,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:35:27,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 12:35:27,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:27,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:27,409 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:35:27,409 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:27,415 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:27,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95836055] [2020-12-03 12:35:27,538 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:380) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:35:27,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:27,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2020-12-03 12:35:27,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980200243] [2020-12-03 12:35:27,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-03 12:35:27,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:27,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-03 12:35:27,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:35:27,542 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 16 states. [2020-12-03 12:35:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:28,059 INFO L93 Difference]: Finished difference Result 153 states and 367 transitions. [2020-12-03 12:35:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-03 12:35:28,060 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-12-03 12:35:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:28,061 INFO L225 Difference]: With dead ends: 153 [2020-12-03 12:35:28,061 INFO L226 Difference]: Without dead ends: 105 [2020-12-03 12:35:28,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=452, Invalid=954, Unknown=0, NotChecked=0, Total=1406 [2020-12-03 12:35:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-03 12:35:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 65. [2020-12-03 12:35:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-03 12:35:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-12-03 12:35:28,066 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 14 [2020-12-03 12:35:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:28,066 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-12-03 12:35:28,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-03 12:35:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-12-03 12:35:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-03 12:35:28,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:28,067 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:28,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:28,278 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:28,278 INFO L82 PathProgramCache]: Analyzing trace with hash -695615729, now seen corresponding path program 9 times [2020-12-03 12:35:28,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:28,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996423205] [2020-12-03 12:35:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:28,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996423205] [2020-12-03 12:35:28,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397344597] [2020-12-03 12:35:28,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:28,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:35:28,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:35:28,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-03 12:35:28,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:28,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:28,543 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:35:28,543 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:28,547 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:28,566 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:28,587 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:28,612 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:28,644 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:28,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1868987900] [2020-12-03 12:35:28,714 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:380) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:35:28,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:28,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2020-12-03 12:35:28,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015725493] [2020-12-03 12:35:28,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-03 12:35:28,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:28,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-03 12:35:28,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-12-03 12:35:28,719 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 22 states. [2020-12-03 12:35:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:28,967 INFO L93 Difference]: Finished difference Result 100 states and 233 transitions. [2020-12-03 12:35:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-03 12:35:28,967 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 17 [2020-12-03 12:35:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:28,968 INFO L225 Difference]: With dead ends: 100 [2020-12-03 12:35:28,969 INFO L226 Difference]: Without dead ends: 94 [2020-12-03 12:35:28,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-12-03 12:35:28,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-03 12:35:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-12-03 12:35:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-03 12:35:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2020-12-03 12:35:28,973 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 17 [2020-12-03 12:35:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:28,973 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2020-12-03 12:35:28,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-03 12:35:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2020-12-03 12:35:28,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-03 12:35:28,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:28,974 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:29,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-03 12:35:29,174 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:29,175 INFO L82 PathProgramCache]: Analyzing trace with hash -781705849, now seen corresponding path program 10 times [2020-12-03 12:35:29,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:29,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265931102] [2020-12-03 12:35:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:29,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265931102] [2020-12-03 12:35:29,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404170933] [2020-12-03 12:35:29,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:29,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-03 12:35:29,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:29,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:29,428 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:35:29,429 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:29,433 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:29,452 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:29,483 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:29,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2015132658] [2020-12-03 12:35:29,590 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:380) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:35:29,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:29,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2020-12-03 12:35:29,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104469931] [2020-12-03 12:35:29,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-03 12:35:29,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:29,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-03 12:35:29,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-12-03 12:35:29,595 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand 22 states. [2020-12-03 12:35:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:29,885 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-12-03 12:35:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-03 12:35:29,885 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 17 [2020-12-03 12:35:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:29,886 INFO L225 Difference]: With dead ends: 101 [2020-12-03 12:35:29,887 INFO L226 Difference]: Without dead ends: 95 [2020-12-03 12:35:29,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2020-12-03 12:35:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-03 12:35:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2020-12-03 12:35:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-03 12:35:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-12-03 12:35:29,891 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 17 [2020-12-03 12:35:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:29,891 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-12-03 12:35:29,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-03 12:35:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-12-03 12:35:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-03 12:35:29,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:29,892 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:30,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:30,102 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:30,102 INFO L82 PathProgramCache]: Analyzing trace with hash -759449089, now seen corresponding path program 11 times [2020-12-03 12:35:30,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:30,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825866427] [2020-12-03 12:35:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:30,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825866427] [2020-12-03 12:35:30,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344847667] [2020-12-03 12:35:30,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:30,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-03 12:35:30,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:35:30,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-03 12:35:30,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:30,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:30,309 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:35:30,309 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:30,314 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:30,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091814742] [2020-12-03 12:35:30,439 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:380) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:35:30,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:30,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2020-12-03 12:35:30,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136862144] [2020-12-03 12:35:30,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-03 12:35:30,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:30,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-03 12:35:30,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-12-03 12:35:30,443 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 22 states. [2020-12-03 12:35:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:30,778 INFO L93 Difference]: Finished difference Result 135 states and 324 transitions. [2020-12-03 12:35:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-03 12:35:30,780 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 17 [2020-12-03 12:35:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:30,781 INFO L225 Difference]: With dead ends: 135 [2020-12-03 12:35:30,781 INFO L226 Difference]: Without dead ends: 123 [2020-12-03 12:35:30,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=949, Unknown=0, NotChecked=0, Total=1332 [2020-12-03 12:35:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-03 12:35:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 69. [2020-12-03 12:35:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-03 12:35:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 175 transitions. [2020-12-03 12:35:30,787 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 175 transitions. Word has length 17 [2020-12-03 12:35:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:30,787 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 175 transitions. [2020-12-03 12:35:30,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-03 12:35:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 175 transitions. [2020-12-03 12:35:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-03 12:35:30,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:30,788 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:30,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-03 12:35:30,996 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:30,996 INFO L82 PathProgramCache]: Analyzing trace with hash -759426769, now seen corresponding path program 12 times [2020-12-03 12:35:30,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:30,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963569463] [2020-12-03 12:35:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:31,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963569463] [2020-12-03 12:35:31,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617190733] [2020-12-03 12:35:31,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:31,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:35:31,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:35:31,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-03 12:35:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:31,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:31,207 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:35:31,207 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:31,212 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:31,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798251481] [2020-12-03 12:35:31,317 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:380) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:35:31,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:31,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2020-12-03 12:35:31,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834472620] [2020-12-03 12:35:31,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-03 12:35:31,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-03 12:35:31,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-12-03 12:35:31,319 INFO L87 Difference]: Start difference. First operand 69 states and 175 transitions. Second operand 22 states. [2020-12-03 12:35:31,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:31,772 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-12-03 12:35:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-03 12:35:31,772 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 17 [2020-12-03 12:35:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:31,773 INFO L225 Difference]: With dead ends: 119 [2020-12-03 12:35:31,773 INFO L226 Difference]: Without dead ends: 106 [2020-12-03 12:35:31,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2020-12-03 12:35:31,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-03 12:35:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 67. [2020-12-03 12:35:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-03 12:35:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-12-03 12:35:31,778 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 17 [2020-12-03 12:35:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:31,778 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-12-03 12:35:31,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-03 12:35:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-12-03 12:35:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 12:35:31,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:31,779 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:31,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-03 12:35:31,994 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:31,994 INFO L82 PathProgramCache]: Analyzing trace with hash 873403792, now seen corresponding path program 13 times [2020-12-03 12:35:31,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:31,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908681447] [2020-12-03 12:35:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:35:32,003 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:35:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:35:32,026 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:35:32,047 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:35:32,047 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:35:32,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-03 12:35:32,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:35:32 BasicIcfg [2020-12-03 12:35:32,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:35:32,114 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:35:32,114 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:35:32,114 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:35:32,115 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:18" (3/4) ... [2020-12-03 12:35:32,117 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:35:32,209 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0c80fc74-b13a-4fdc-bc13-20558edf2879/bin/utaipan/witness.graphml [2020-12-03 12:35:32,210 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:35:32,210 INFO L168 Benchmark]: Toolchain (without parser) took 14848.35 ms. Allocated memory was 100.7 MB in the beginning and 268.4 MB in the end (delta: 167.8 MB). Free memory was 69.4 MB in the beginning and 183.3 MB in the end (delta: -114.0 MB). Peak memory consumption was 53.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:32,211 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory is still 57.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:35:32,211 INFO L168 Benchmark]: CACSL2BoogieTranslator took 774.30 ms. Allocated memory was 100.7 MB in the beginning and 153.1 MB in the end (delta: 52.4 MB). Free memory was 69.2 MB in the beginning and 109.7 MB in the end (delta: -40.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:32,212 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.80 ms. Allocated memory is still 153.1 MB. Free memory was 109.7 MB in the beginning and 108.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:32,212 INFO L168 Benchmark]: Boogie Preprocessor took 59.37 ms. Allocated memory is still 153.1 MB. Free memory was 108.1 MB in the beginning and 106.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:32,213 INFO L168 Benchmark]: RCFGBuilder took 543.39 ms. Allocated memory is still 153.1 MB. Free memory was 106.5 MB in the beginning and 86.7 MB in the end (delta: 19.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:32,213 INFO L168 Benchmark]: TraceAbstraction took 13303.60 ms. Allocated memory was 153.1 MB in the beginning and 268.4 MB in the end (delta: 115.3 MB). Free memory was 86.2 MB in the beginning and 189.6 MB in the end (delta: -103.4 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:32,213 INFO L168 Benchmark]: Witness Printer took 95.83 ms. Allocated memory is still 268.4 MB. Free memory was 189.6 MB in the beginning and 183.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:32,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory is still 57.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 774.30 ms. Allocated memory was 100.7 MB in the beginning and 153.1 MB in the end (delta: 52.4 MB). Free memory was 69.2 MB in the beginning and 109.7 MB in the end (delta: -40.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.80 ms. Allocated memory is still 153.1 MB. Free memory was 109.7 MB in the beginning and 108.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.37 ms. Allocated memory is still 153.1 MB. Free memory was 108.1 MB in the beginning and 106.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 543.39 ms. Allocated memory is still 153.1 MB. Free memory was 106.5 MB in the beginning and 86.7 MB in the end (delta: 19.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13303.60 ms. Allocated memory was 153.1 MB in the beginning and 268.4 MB in the end (delta: 115.3 MB). Free memory was 86.2 MB in the beginning and 189.6 MB in the end (delta: -103.4 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. * Witness Printer took 95.83 ms. Allocated memory is still 268.4 MB. Free memory was 189.6 MB in the beginning and 183.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 645 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.6s, 62 PlacesBefore, 20 PlacesAfterwards, 60 TransitionsBefore, 16 TransitionsAfterwards, 968 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 52 TotalNumberOfCompositions, 998 MoverChecksTotal - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.0s, OverallIterations: 17, TraceHistogramMax: 5, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 235 SDtfs, 881 SDslu, 786 SDs, 0 SdLazy, 887 SolverSat, 525 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 449 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=11, 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, 16 MinimizatonAttempts, 343 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 324 NumberOfCodeBlocks, 323 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 392 ConstructedInterpolants, 0 QuantifiedInterpolants, 21200 SizeOfPredicates, 48 NumberOfNonLiveVariables, 905 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 18/240 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 incorrect! Received shutdown request...