./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/thin002_tso.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/thin002_tso.oepc.i -s /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/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 586443bdba3a0440a46012510813ca1b149248c0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:51:56,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:51:56,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:51:56,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:51:56,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:51:56,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:51:56,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:51:56,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:51:56,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:51:56,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:51:56,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:51:56,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:51:56,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:51:56,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:51:56,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:51:56,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:51:56,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:51:56,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:51:56,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:51:56,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:51:56,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:51:56,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:51:56,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:51:56,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:51:56,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:51:56,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:51:56,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:51:56,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:51:56,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:51:56,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:51:56,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:51:56,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:51:56,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:51:56,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:51:56,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:51:56,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:51:56,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:51:56,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:51:56,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:51:56,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:51:56,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:51:56,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:51:56,300 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:51:56,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:51:56,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:51:56,302 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:51:56,303 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:51:56,304 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:51:56,304 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:51:56,304 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:51:56,305 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:51:56,305 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:51:56,306 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:51:56,307 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:51:56,307 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:51:56,307 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:51:56,307 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:51:56,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:51:56,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:51:56,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:51:56,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:51:56,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:51:56,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:51:56,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:51:56,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:51:56,311 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:51:56,311 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:51:56,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:51:56,311 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:51:56,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:51:56,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:51:56,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:51:56,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:51:56,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:51:56,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:51:56,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:51:56,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:51:56,316 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:51:56,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:51:56,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:51:56,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:51:56,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:51:56,317 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_93343c7c-f057-421b-bd06-f50bf1c72f33/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 586443bdba3a0440a46012510813ca1b149248c0 [2020-11-22 12:51:56,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:51:56,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:51:56,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:51:56,657 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:51:56,658 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:51:56,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/thin002_tso.oepc.i [2020-11-22 12:51:56,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/data/8e70cd33e/79c235d02e17406097ca66799ac7db15/FLAG46ae20061 [2020-11-22 12:51:57,456 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:51:57,457 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/sv-benchmarks/c/pthread-wmm/thin002_tso.oepc.i [2020-11-22 12:51:57,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/data/8e70cd33e/79c235d02e17406097ca66799ac7db15/FLAG46ae20061 [2020-11-22 12:51:57,674 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/data/8e70cd33e/79c235d02e17406097ca66799ac7db15 [2020-11-22 12:51:57,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:51:57,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:51:57,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:51:57,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:51:57,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:51:57,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:51:57" (1/1) ... [2020-11-22 12:51:57,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36d94d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:57, skipping insertion in model container [2020-11-22 12:51:57,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:51:57" (1/1) ... [2020-11-22 12:51:57,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:51:57,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:51:58,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:51:58,379 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:51:58,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:51:58,552 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:51:58,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58 WrapperNode [2020-11-22 12:51:58,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:51:58,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:51:58,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:51:58,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:51:58,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (1/1) ... [2020-11-22 12:51:58,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (1/1) ... [2020-11-22 12:51:58,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:51:58,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:51:58,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:51:58,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:51:58,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (1/1) ... [2020-11-22 12:51:58,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (1/1) ... [2020-11-22 12:51:58,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (1/1) ... [2020-11-22 12:51:58,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (1/1) ... [2020-11-22 12:51:58,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (1/1) ... [2020-11-22 12:51:58,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (1/1) ... [2020-11-22 12:51:58,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (1/1) ... [2020-11-22 12:51:58,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:51:58,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:51:58,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:51:58,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:51:58,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:51:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:51:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-22 12:51:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:51:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:51:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-22 12:51:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-22 12:51:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-22 12:51:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-22 12:51:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-11-22 12:51:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-11-22 12:51:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2020-11-22 12:51:58,775 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2020-11-22 12:51:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:51:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-22 12:51:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:51:58,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:51:58,778 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-22 12:51:59,327 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:51:59,327 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-22 12:51:59,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:59 BoogieIcfgContainer [2020-11-22 12:51:59,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:51:59,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:51:59,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:51:59,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:51:59,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:51:57" (1/3) ... [2020-11-22 12:51:59,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19587ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:51:59, skipping insertion in model container [2020-11-22 12:51:59,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:58" (2/3) ... [2020-11-22 12:51:59,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19587ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:51:59, skipping insertion in model container [2020-11-22 12:51:59,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:59" (3/3) ... [2020-11-22 12:51:59,341 INFO L111 eAbstractionObserver]: Analyzing ICFG thin002_tso.oepc.i [2020-11-22 12:51:59,355 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-22 12:51:59,355 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:51:59,361 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:51:59,362 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-22 12:51:59,395 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,395 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,396 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,396 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,397 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,397 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,398 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,398 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,398 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,400 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,403 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,403 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,404 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,404 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,404 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,404 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,405 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,405 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,405 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,406 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,406 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,406 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,406 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,407 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,409 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,410 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,410 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,410 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,427 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,427 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,427 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,427 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,430 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,430 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,431 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,431 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,438 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,438 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,438 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,439 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:51:59,441 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-22 12:51:59,455 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-22 12:51:59,481 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:51:59,481 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:51:59,481 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:51:59,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:51:59,482 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:51:59,482 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:51:59,482 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:51:59,482 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:51:59,498 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-22 12:51:59,500 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 95 transitions, 210 flow [2020-11-22 12:51:59,504 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 95 transitions, 210 flow [2020-11-22 12:51:59,506 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 105 places, 95 transitions, 210 flow [2020-11-22 12:51:59,562 INFO L129 PetriNetUnfolder]: 3/91 cut-off events. [2020-11-22 12:51:59,562 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-22 12:51:59,568 INFO L80 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 3/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2020-11-22 12:51:59,578 INFO L116 LiptonReduction]: Number of co-enabled transitions 2256 [2020-11-22 12:52:02,050 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-11-22 12:52:02,767 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-11-22 12:52:02,886 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-11-22 12:52:02,968 INFO L131 LiptonReduction]: Checked pairs total: 4418 [2020-11-22 12:52:02,968 INFO L133 LiptonReduction]: Total number of compositions: 80 [2020-11-22 12:52:02,973 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 29 transitions, 78 flow [2020-11-22 12:52:03,110 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1450 states. [2020-11-22 12:52:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states. [2020-11-22 12:52:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 12:52:03,124 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:03,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:52:03,125 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash 481695671, now seen corresponding path program 1 times [2020-11-22 12:52:03,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:03,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443025633] [2020-11-22 12:52:03,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:52:03,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443025633] [2020-11-22 12:52:03,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:03,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:52:03,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91151412] [2020-11-22 12:52:03,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:52:03,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:03,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:52:03,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:52:03,425 INFO L87 Difference]: Start difference. First operand 1450 states. Second operand 2 states. [2020-11-22 12:52:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:03,501 INFO L93 Difference]: Finished difference Result 1450 states and 5376 transitions. [2020-11-22 12:52:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:52:03,503 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-22 12:52:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:03,541 INFO L225 Difference]: With dead ends: 1450 [2020-11-22 12:52:03,541 INFO L226 Difference]: Without dead ends: 1194 [2020-11-22 12:52:03,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:52:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-11-22 12:52:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1194. [2020-11-22 12:52:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2020-11-22 12:52:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 4352 transitions. [2020-11-22 12:52:03,759 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 4352 transitions. Word has length 10 [2020-11-22 12:52:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:03,761 INFO L481 AbstractCegarLoop]: Abstraction has 1194 states and 4352 transitions. [2020-11-22 12:52:03,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:52:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 4352 transitions. [2020-11-22 12:52:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 12:52:03,765 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:03,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:52:03,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:52:03,766 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:03,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2047662136, now seen corresponding path program 1 times [2020-11-22 12:52:03,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:03,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415122556] [2020-11-22 12:52:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:52:03,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415122556] [2020-11-22 12:52:03,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:03,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:52:03,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785004751] [2020-11-22 12:52:03,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:52:03,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:52:03,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:52:03,972 INFO L87 Difference]: Start difference. First operand 1194 states and 4352 transitions. Second operand 4 states. [2020-11-22 12:52:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:04,055 INFO L93 Difference]: Finished difference Result 1322 states and 4640 transitions. [2020-11-22 12:52:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:52:04,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 12:52:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:04,071 INFO L225 Difference]: With dead ends: 1322 [2020-11-22 12:52:04,071 INFO L226 Difference]: Without dead ends: 1066 [2020-11-22 12:52:04,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:52:04,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-11-22 12:52:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1066. [2020-11-22 12:52:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-11-22 12:52:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 3808 transitions. [2020-11-22 12:52:04,149 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 3808 transitions. Word has length 11 [2020-11-22 12:52:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:04,150 INFO L481 AbstractCegarLoop]: Abstraction has 1066 states and 3808 transitions. [2020-11-22 12:52:04,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:52:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 3808 transitions. [2020-11-22 12:52:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:52:04,158 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:04,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:52:04,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:52:04,159 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:04,160 INFO L82 PathProgramCache]: Analyzing trace with hash -947021519, now seen corresponding path program 1 times [2020-11-22 12:52:04,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:04,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232037491] [2020-11-22 12:52:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:52:04,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232037491] [2020-11-22 12:52:04,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:04,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:52:04,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659979559] [2020-11-22 12:52:04,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:52:04,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:04,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:52:04,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:52:04,354 INFO L87 Difference]: Start difference. First operand 1066 states and 3808 transitions. Second operand 4 states. [2020-11-22 12:52:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:04,408 INFO L93 Difference]: Finished difference Result 1162 states and 4016 transitions. [2020-11-22 12:52:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:52:04,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 12:52:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:04,422 INFO L225 Difference]: With dead ends: 1162 [2020-11-22 12:52:04,422 INFO L226 Difference]: Without dead ends: 970 [2020-11-22 12:52:04,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:52:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-11-22 12:52:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 970. [2020-11-22 12:52:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-11-22 12:52:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 3408 transitions. [2020-11-22 12:52:04,482 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 3408 transitions. Word has length 12 [2020-11-22 12:52:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:04,482 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 3408 transitions. [2020-11-22 12:52:04,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:52:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 3408 transitions. [2020-11-22 12:52:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:52:04,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:04,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:52:04,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:52:04,486 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash 639493830, now seen corresponding path program 1 times [2020-11-22 12:52:04,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:04,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868880083] [2020-11-22 12:52:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:52:04,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868880083] [2020-11-22 12:52:04,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:04,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:52:04,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233755028] [2020-11-22 12:52:04,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:52:04,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:04,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:52:04,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:52:04,611 INFO L87 Difference]: Start difference. First operand 970 states and 3408 transitions. Second operand 5 states. [2020-11-22 12:52:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:04,705 INFO L93 Difference]: Finished difference Result 1162 states and 3980 transitions. [2020-11-22 12:52:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:52:04,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-22 12:52:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:04,713 INFO L225 Difference]: With dead ends: 1162 [2020-11-22 12:52:04,714 INFO L226 Difference]: Without dead ends: 508 [2020-11-22 12:52:04,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:52:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-11-22 12:52:04,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2020-11-22 12:52:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-11-22 12:52:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1638 transitions. [2020-11-22 12:52:04,747 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1638 transitions. Word has length 13 [2020-11-22 12:52:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:04,747 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 1638 transitions. [2020-11-22 12:52:04,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:52:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1638 transitions. [2020-11-22 12:52:04,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 12:52:04,749 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:04,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:52:04,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:52:04,756 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash 380154805, now seen corresponding path program 1 times [2020-11-22 12:52:04,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:04,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34212043] [2020-11-22 12:52:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:52:04,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34212043] [2020-11-22 12:52:04,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:04,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:52:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429367870] [2020-11-22 12:52:04,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:52:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:04,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:52:04,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:52:04,884 INFO L87 Difference]: Start difference. First operand 508 states and 1638 transitions. Second operand 4 states. [2020-11-22 12:52:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:04,930 INFO L93 Difference]: Finished difference Result 544 states and 1704 transitions. [2020-11-22 12:52:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:52:04,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-22 12:52:04,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:04,937 INFO L225 Difference]: With dead ends: 544 [2020-11-22 12:52:04,937 INFO L226 Difference]: Without dead ends: 472 [2020-11-22 12:52:04,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:52:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-11-22 12:52:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 472. [2020-11-22 12:52:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-11-22 12:52:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1500 transitions. [2020-11-22 12:52:04,964 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1500 transitions. Word has length 15 [2020-11-22 12:52:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:04,964 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 1500 transitions. [2020-11-22 12:52:04,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:52:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1500 transitions. [2020-11-22 12:52:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 12:52:04,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:04,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:52:04,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 12:52:04,967 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:04,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2067323682, now seen corresponding path program 1 times [2020-11-22 12:52:04,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:04,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464392581] [2020-11-22 12:52:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:52:05,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464392581] [2020-11-22 12:52:05,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:05,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:52:05,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183635419] [2020-11-22 12:52:05,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:52:05,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:05,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:52:05,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:52:05,104 INFO L87 Difference]: Start difference. First operand 472 states and 1500 transitions. Second operand 5 states. [2020-11-22 12:52:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:05,177 INFO L93 Difference]: Finished difference Result 586 states and 1831 transitions. [2020-11-22 12:52:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:52:05,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-22 12:52:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:05,182 INFO L225 Difference]: With dead ends: 586 [2020-11-22 12:52:05,182 INFO L226 Difference]: Without dead ends: 262 [2020-11-22 12:52:05,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:52:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-11-22 12:52:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2020-11-22 12:52:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-11-22 12:52:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 768 transitions. [2020-11-22 12:52:05,198 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 768 transitions. Word has length 16 [2020-11-22 12:52:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:05,199 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 768 transitions. [2020-11-22 12:52:05,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:52:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 768 transitions. [2020-11-22 12:52:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 12:52:05,200 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:05,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:52:05,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 12:52:05,201 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash 253681578, now seen corresponding path program 1 times [2020-11-22 12:52:05,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:05,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905158738] [2020-11-22 12:52:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:52:05,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905158738] [2020-11-22 12:52:05,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:05,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:52:05,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323562041] [2020-11-22 12:52:05,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:52:05,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:05,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:52:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:52:05,301 INFO L87 Difference]: Start difference. First operand 262 states and 768 transitions. Second operand 5 states. [2020-11-22 12:52:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:05,367 INFO L93 Difference]: Finished difference Result 358 states and 1024 transitions. [2020-11-22 12:52:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:52:05,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-22 12:52:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:05,370 INFO L225 Difference]: With dead ends: 358 [2020-11-22 12:52:05,370 INFO L226 Difference]: Without dead ends: 154 [2020-11-22 12:52:05,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:52:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-22 12:52:05,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-11-22 12:52:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-22 12:52:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 410 transitions. [2020-11-22 12:52:05,378 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 410 transitions. Word has length 17 [2020-11-22 12:52:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:05,378 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 410 transitions. [2020-11-22 12:52:05,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:52:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 410 transitions. [2020-11-22 12:52:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 12:52:05,380 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:05,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:52:05,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 12:52:05,384 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2117772472, now seen corresponding path program 1 times [2020-11-22 12:52:05,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:05,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336600716] [2020-11-22 12:52:05,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:52:05,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336600716] [2020-11-22 12:52:05,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:05,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:52:05,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914773813] [2020-11-22 12:52:05,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:52:05,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:52:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:52:05,481 INFO L87 Difference]: Start difference. First operand 154 states and 410 transitions. Second operand 5 states. [2020-11-22 12:52:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:05,532 INFO L93 Difference]: Finished difference Result 130 states and 334 transitions. [2020-11-22 12:52:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:52:05,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-22 12:52:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:05,533 INFO L225 Difference]: With dead ends: 130 [2020-11-22 12:52:05,534 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:52:05,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:52:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:52:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:52:05,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:52:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:52:05,535 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-11-22 12:52:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:05,535 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:52:05,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:52:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:52:05,535 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:52:05,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 12:52:05,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:52:05 BasicIcfg [2020-11-22 12:52:05,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:52:05,542 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:52:05,542 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:52:05,542 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:52:05,543 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:59" (3/4) ... [2020-11-22 12:52:05,548 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:52:05,555 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-11-22 12:52:05,555 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-11-22 12:52:05,556 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-11-22 12:52:05,556 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P3 [2020-11-22 12:52:05,566 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-22 12:52:05,566 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:52:05,567 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:52:05,567 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:52:05,643 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_93343c7c-f057-421b-bd06-f50bf1c72f33/bin/utaipan/witness.graphml [2020-11-22 12:52:05,643 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:52:05,645 INFO L168 Benchmark]: Toolchain (without parser) took 7961.97 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 75.3 MB in the beginning and 65.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 54.9 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,646 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 77.6 MB. Free memory was 35.4 MB in the beginning and 35.3 MB in the end (delta: 41.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:52:05,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 866.15 ms. Allocated memory is still 104.9 MB. Free memory was 75.0 MB in the beginning and 60.9 MB in the end (delta: 14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.16 ms. Allocated memory is still 104.9 MB. Free memory was 60.5 MB in the beginning and 58.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,652 INFO L168 Benchmark]: Boogie Preprocessor took 46.07 ms. Allocated memory is still 104.9 MB. Free memory was 58.8 MB in the beginning and 57.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,653 INFO L168 Benchmark]: RCFGBuilder took 645.23 ms. Allocated memory is still 104.9 MB. Free memory was 57.2 MB in the beginning and 71.0 MB in the end (delta: -13.8 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,653 INFO L168 Benchmark]: TraceAbstraction took 6209.07 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 70.4 MB in the beginning and 68.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,654 INFO L168 Benchmark]: Witness Printer took 101.42 ms. Allocated memory is still 151.0 MB. Free memory was 68.7 MB in the beginning and 65.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,657 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 77.6 MB. Free memory was 35.4 MB in the beginning and 35.3 MB in the end (delta: 41.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 866.15 ms. Allocated memory is still 104.9 MB. Free memory was 75.0 MB in the beginning and 60.9 MB in the end (delta: 14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 83.16 ms. Allocated memory is still 104.9 MB. Free memory was 60.5 MB in the beginning and 58.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.07 ms. Allocated memory is still 104.9 MB. Free memory was 58.8 MB in the beginning and 57.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 645.23 ms. Allocated memory is still 104.9 MB. Free memory was 57.2 MB in the beginning and 71.0 MB in the end (delta: -13.8 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6209.07 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 70.4 MB in the beginning and 68.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.1 GB. * Witness Printer took 101.42 ms. Allocated memory is still 151.0 MB. Free memory was 68.7 MB in the beginning and 65.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1644 VarBasedMoverChecksPositive, 61 VarBasedMoverChecksNegative, 12 SemBasedMoverChecksPositive, 49 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.6s, 172 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.4s, 105 PlacesBefore, 41 PlacesAfterwards, 95 TransitionsBefore, 29 TransitionsAfterwards, 2256 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 2 ChoiceCompositions, 80 TotalNumberOfCompositions, 4418 MoverChecksTotal - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 93 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.0s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 232 SDtfs, 257 SDslu, 326 SDs, 0 SdLazy, 57 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1450occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 4169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...