./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/gcd-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/gcd-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH --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 abac4834eb8b1123405a2c6108c3d30e84ad22df2224a055d262e226b4ba66e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:44:25,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:44:25,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:44:25,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:44:25,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:44:25,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:44:25,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:44:25,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:44:25,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:44:25,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:44:25,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:44:25,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:44:25,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:44:25,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:44:25,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:44:25,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:44:25,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:44:25,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:44:25,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:44:25,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:44:25,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:44:25,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:44:25,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:44:25,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:44:25,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:44:25,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:44:25,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:44:25,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:44:25,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:44:25,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:44:25,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:44:25,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:44:25,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:44:25,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:44:25,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:44:25,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:44:25,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:44:25,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:44:25,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:44:25,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:44:25,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:44:25,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:44:25,283 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:44:25,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:44:25,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:44:25,284 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:44:25,285 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:44:25,285 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:44:25,285 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:44:25,285 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:44:25,291 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:44:25,293 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:44:25,294 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:44:25,294 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:44:25,294 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:44:25,294 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:44:25,295 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:44:25,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:44:25,296 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:44:25,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:44:25,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:44:25,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:44:25,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:44:25,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:44:25,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:44:25,297 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:44:25,298 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:44:25,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:44:25,298 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:44:25,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:44:25,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:44:25,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:44:25,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:44:25,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:44:25,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:44:25,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:44:25,300 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:44:25,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:44:25,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:44:25,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:44:25,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:44:25,301 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_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abac4834eb8b1123405a2c6108c3d30e84ad22df2224a055d262e226b4ba66e1 [2021-11-03 05:44:25,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:44:25,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:44:25,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:44:25,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:44:25,613 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:44:25,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/pthread-atomic/gcd-2.i [2021-11-03 05:44:25,690 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/data/efdb2ea2a/1f39f322e7234702b6e26f90f8a94ee9/FLAGb01055580 [2021-11-03 05:44:26,202 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:44:26,209 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/sv-benchmarks/c/pthread-atomic/gcd-2.i [2021-11-03 05:44:26,222 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/data/efdb2ea2a/1f39f322e7234702b6e26f90f8a94ee9/FLAGb01055580 [2021-11-03 05:44:26,529 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/data/efdb2ea2a/1f39f322e7234702b6e26f90f8a94ee9 [2021-11-03 05:44:26,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:44:26,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:44:26,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:44:26,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:44:26,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:44:26,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:44:26" (1/1) ... [2021-11-03 05:44:26,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67758c83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:26, skipping insertion in model container [2021-11-03 05:44:26,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:44:26" (1/1) ... [2021-11-03 05:44:26,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:44:26,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:44:26,795 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/sv-benchmarks/c/pthread-atomic/gcd-2.i[938,951] [2021-11-03 05:44:26,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:44:26,963 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:44:26,975 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/sv-benchmarks/c/pthread-atomic/gcd-2.i[938,951] [2021-11-03 05:44:27,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:44:27,080 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:44:27,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27 WrapperNode [2021-11-03 05:44:27,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:44:27,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:44:27,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:44:27,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:44:27,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (1/1) ... [2021-11-03 05:44:27,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (1/1) ... [2021-11-03 05:44:27,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:44:27,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:44:27,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:44:27,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:44:27,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (1/1) ... [2021-11-03 05:44:27,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (1/1) ... [2021-11-03 05:44:27,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (1/1) ... [2021-11-03 05:44:27,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (1/1) ... [2021-11-03 05:44:27,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (1/1) ... [2021-11-03 05:44:27,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (1/1) ... [2021-11-03 05:44:27,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (1/1) ... [2021-11-03 05:44:27,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:44:27,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:44:27,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:44:27,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:44:27,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (1/1) ... [2021-11-03 05:44:27,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:44:27,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:44:27,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:44:27,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:44:27,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 05:44:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 05:44:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:44:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:44:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure dec_a [2021-11-03 05:44:27,328 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_a [2021-11-03 05:44:27,328 INFO L130 BoogieDeclarations]: Found specification of procedure dec_b [2021-11-03 05:44:27,328 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_b [2021-11-03 05:44:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:44:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:44:27,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:44:27,330 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-03 05:44:27,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:44:27,823 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-11-03 05:44:27,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:44:27 BoogieIcfgContainer [2021-11-03 05:44:27,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:44:27,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:44:27,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:44:27,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:44:27,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:44:26" (1/3) ... [2021-11-03 05:44:27,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b33a13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:44:27, skipping insertion in model container [2021-11-03 05:44:27,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:27" (2/3) ... [2021-11-03 05:44:27,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b33a13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:44:27, skipping insertion in model container [2021-11-03 05:44:27,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:44:27" (3/3) ... [2021-11-03 05:44:27,834 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd-2.i [2021-11-03 05:44:27,839 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-03 05:44:27,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:44:27,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-03 05:44:27,840 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-03 05:44:27,867 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,867 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,867 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,867 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,868 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,868 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,868 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,868 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,869 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,869 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,869 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,869 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,870 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,870 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,870 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,870 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,871 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,871 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,871 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,871 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,871 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,872 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,872 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,872 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,875 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,875 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,875 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,876 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,878 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,878 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,878 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,878 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-03 05:44:27,884 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-03 05:44:27,926 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:44:27,932 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:44:27,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 05:44:27,951 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-03 05:44:27,960 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 129 transitions, 274 flow [2021-11-03 05:44:27,967 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 129 transitions, 274 flow [2021-11-03 05:44:27,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 124 places, 129 transitions, 274 flow [2021-11-03 05:44:28,036 INFO L129 PetriNetUnfolder]: 12/127 cut-off events. [2021-11-03 05:44:28,036 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-03 05:44:28,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 127 events. 12/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2021-11-03 05:44:28,042 INFO L116 LiptonReduction]: Number of co-enabled transitions 308 [2021-11-03 05:44:52,314 INFO L131 LiptonReduction]: Checked pairs total: 750 [2021-11-03 05:44:52,314 INFO L133 LiptonReduction]: Total number of compositions: 149 [2021-11-03 05:44:52,327 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-11-03 05:44:52,338 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:44:52,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:52,345 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:52,345 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:44:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:52,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1994466237, now seen corresponding path program 1 times [2021-11-03 05:44:52,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:52,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639255092] [2021-11-03 05:44:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:52,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:52,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:44:52,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052068457] [2021-11-03 05:44:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:52,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:44:52,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:44:52,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:44:52,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:44:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:52,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-03 05:44:52,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:44:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:52,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:44:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:57,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:57,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639255092] [2021-11-03 05:44:57,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:44:57,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052068457] [2021-11-03 05:44:57,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052068457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:57,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:57,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-03 05:44:57,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874916728] [2021-11-03 05:44:57,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:44:57,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:44:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:44:57,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 05:44:57,424 INFO L87 Difference]: Start difference. First operand has 54 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:39,257 INFO L93 Difference]: Finished difference Result 130 states and 274 transitions. [2021-11-03 05:45:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:45:39,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:45:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:39,364 INFO L225 Difference]: With dead ends: 130 [2021-11-03 05:45:39,364 INFO L226 Difference]: Without dead ends: 130 [2021-11-03 05:45:39,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:45:39,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-03 05:45:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 113. [2021-11-03 05:45:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 110 states have (on average 2.3) internal successors, (253), 112 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 253 transitions. [2021-11-03 05:45:39,404 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 253 transitions. Word has length 13 [2021-11-03 05:45:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:39,405 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 253 transitions. [2021-11-03 05:45:39,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:39,406 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 253 transitions. [2021-11-03 05:45:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:45:39,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:39,408 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:39,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:39,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-03 05:45:39,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:45:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:39,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1994466238, now seen corresponding path program 1 times [2021-11-03 05:45:39,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:39,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579292424] [2021-11-03 05:45:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:39,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:39,670 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:45:39,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931592107] [2021-11-03 05:45:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:39,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:39,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:39,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:39,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 05:45:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:39,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-03 05:45:39,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:40,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:42,557 WARN L838 $PredicateComparison]: unable to prove that (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 Int)) (let ((.cse0 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72)))) (or (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 4294967296)) 4294967296) 0)) (<= .cse0 1) (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72) (<= 4294967296 .cse0)))) is different from false [2021-11-03 05:45:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:44,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:44,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579292424] [2021-11-03 05:45:44,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:45:44,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931592107] [2021-11-03 05:45:44,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931592107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:44,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:44,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-03 05:45:44,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972602324] [2021-11-03 05:45:44,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:45:44,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:44,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:45:44,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=12, Unknown=1, NotChecked=6, Total=30 [2021-11-03 05:45:44,676 INFO L87 Difference]: Start difference. First operand 113 states and 253 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:46,917 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod c_ULTIMATE.start_main_~a_in~0 4294967296)) (= (mod c_ULTIMATE.start_main_~b_in~0 4294967296) (mod c_~a~0 4294967296)) (= c_ULTIMATE.start_main_~b_in~0 c_~b~0) (= c_ULTIMATE.start_main_~a_in~0 c_~a~0) (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 Int)) (let ((.cse0 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72)))) (or (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 4294967296)) 4294967296) 0)) (<= .cse0 1) (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72) (<= 4294967296 .cse0))))) is different from false [2021-11-03 05:45:49,214 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod c_ULTIMATE.start_main_~a_in~0 4294967296)) (= (mod c_ULTIMATE.start_main_~b_in~0 4294967296) (mod c_~a~0 4294967296)) (= c_ULTIMATE.start_main_~a_in~0 c_~a~0) (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 Int)) (let ((.cse0 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72)))) (or (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 4294967296)) 4294967296) 0)) (<= .cse0 1) (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72) (<= 4294967296 .cse0))))) is different from false [2021-11-03 05:46:00,344 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 Int)) (let ((.cse1 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72)))) (or (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 4294967296)) 4294967296) 0)) (<= .cse1 1) (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72) (<= 4294967296 .cse1)))))) (and (or .cse0 (not (= (mod c_~b~0 4294967296) (mod c_~a~0 4294967296)))) .cse0)) is different from false [2021-11-03 05:46:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:00,898 INFO L93 Difference]: Finished difference Result 177 states and 371 transitions. [2021-11-03 05:46:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:46:00,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:46:00,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:00,905 INFO L225 Difference]: With dead ends: 177 [2021-11-03 05:46:00,906 INFO L226 Difference]: Without dead ends: 161 [2021-11-03 05:46:00,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=22, Invalid=20, Unknown=4, NotChecked=44, Total=90 [2021-11-03 05:46:00,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-03 05:46:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 137. [2021-11-03 05:46:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 134 states have (on average 2.253731343283582) internal successors, (302), 136 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 302 transitions. [2021-11-03 05:46:00,926 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 302 transitions. Word has length 13 [2021-11-03 05:46:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:00,926 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 302 transitions. [2021-11-03 05:46:00,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 302 transitions. [2021-11-03 05:46:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:46:00,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:00,929 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:46:00,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-03 05:46:01,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:46:01,135 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:46:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:01,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1994466239, now seen corresponding path program 1 times [2021-11-03 05:46:01,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:46:01,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854402371] [2021-11-03 05:46:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:01,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:46:01,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:46:01,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295851076] [2021-11-03 05:46:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:01,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:46:01,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:46:01,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:46:01,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 05:46:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:46:01,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-03 05:46:01,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:01,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:01,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:46:01,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854402371] [2021-11-03 05:46:01,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:46:01,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295851076] [2021-11-03 05:46:01,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295851076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:46:01,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:46:01,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-03 05:46:01,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490039665] [2021-11-03 05:46:01,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:46:01,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:46:01,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:46:01,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:46:01,780 INFO L87 Difference]: Start difference. First operand 137 states and 302 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:02,515 INFO L93 Difference]: Finished difference Result 187 states and 399 transitions. [2021-11-03 05:46:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:46:02,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:46:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:02,524 INFO L225 Difference]: With dead ends: 187 [2021-11-03 05:46:02,524 INFO L226 Difference]: Without dead ends: 149 [2021-11-03 05:46:02,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:46:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-03 05:46:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-11-03 05:46:02,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 114 states have (on average 2.210526315789474) internal successors, (252), 116 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 252 transitions. [2021-11-03 05:46:02,535 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 252 transitions. Word has length 13 [2021-11-03 05:46:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:02,536 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 252 transitions. [2021-11-03 05:46:02,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:02,536 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 252 transitions. [2021-11-03 05:46:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 05:46:02,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:02,538 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:46:02,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:02,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:46:02,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:46:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash 251279071, now seen corresponding path program 1 times [2021-11-03 05:46:02,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:46:02,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333385843] [2021-11-03 05:46:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:02,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:46:02,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:46:02,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074627859] [2021-11-03 05:46:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:02,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:46:02,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:46:02,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:46:02,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 05:46:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:46:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 05:46:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:46:03,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:46:03,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:46:03,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333385843] [2021-11-03 05:46:03,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:46:03,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074627859] [2021-11-03 05:46:03,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074627859] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:46:03,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:46:03,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-03 05:46:03,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93806708] [2021-11-03 05:46:03,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:46:03,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:46:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:46:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:46:03,694 INFO L87 Difference]: Start difference. First operand 117 states and 252 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:04,609 INFO L93 Difference]: Finished difference Result 164 states and 344 transitions. [2021-11-03 05:46:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:46:04,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 05:46:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:04,612 INFO L225 Difference]: With dead ends: 164 [2021-11-03 05:46:04,612 INFO L226 Difference]: Without dead ends: 164 [2021-11-03 05:46:04,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:46:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-03 05:46:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 131. [2021-11-03 05:46:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 128 states have (on average 2.25) internal successors, (288), 130 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 288 transitions. [2021-11-03 05:46:04,622 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 288 transitions. Word has length 15 [2021-11-03 05:46:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:04,623 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 288 transitions. [2021-11-03 05:46:04,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 288 transitions. [2021-11-03 05:46:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 05:46:04,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:04,625 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:46:04,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:04,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:46:04,839 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:46:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash 251279073, now seen corresponding path program 1 times [2021-11-03 05:46:04,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:46:04,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125540275] [2021-11-03 05:46:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:04,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:46:04,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:46:04,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341094962] [2021-11-03 05:46:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:04,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:46:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:46:04,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:46:04,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 05:46:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:46:05,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-03 05:46:05,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:05,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:20,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:46:20,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125540275] [2021-11-03 05:46:20,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:46:20,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341094962] [2021-11-03 05:46:20,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341094962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:46:20,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610122469] [2021-11-03 05:46:20,502 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$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:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-03 05:46:20,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:46:20,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-03 05:46:20,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237844305] [2021-11-03 05:46:20,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:46:20,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:46:20,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:46:20,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=54, Unknown=5, NotChecked=0, Total=90 [2021-11-03 05:46:20,505 INFO L87 Difference]: Start difference. First operand 131 states and 288 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:43,091 WARN L207 SmtUtils]: Spent 16.34 s on a formula simplification that was a NOOP. DAG size: 40 [2021-11-03 05:46:45,394 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_ULTIMATE.start_main_~a_in~0 4294967296)) (.cse1 (mod c_~b~0 4294967296)) (.cse2 (mod c_~a~0 4294967296))) (and (or (and (<= .cse0 .cse1) (= c_ULTIMATE.start_main_~a_in~0 c_~a~0)) (and (= (+ c_~b~0 c_~a~0) c_ULTIMATE.start_main_~a_in~0) (< .cse1 .cse0))) (< .cse2 .cse0) (or (= (mod (mod .cse0 .cse1) 4294967296) 0) (and (not (= (mod (+ (* c_~a~0 4294967295) .cse1) (- 4294967296)) 0)) (or (<= .cse2 .cse1) (not (= (mod (+ (* .cse1 4294967295) c_~a~0 (* c_~b~0 4294967295)) 4294967296) 0))))) (< 0 .cse1) (not (= .cse0 .cse1)) (= (mod (+ c_~a~0 .cse2 (* c_ULTIMATE.start_main_~a_in~0 4294967295)) (- 4294967296)) 0))) is different from false [2021-11-03 05:47:17,304 WARN L207 SmtUtils]: Spent 15.06 s on a formula simplification that was a NOOP. DAG size: 32 [2021-11-03 05:47:52,509 WARN L207 SmtUtils]: Spent 18.55 s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-03 05:48:36,089 WARN L207 SmtUtils]: Spent 8.51 s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-03 05:48:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:38,135 INFO L93 Difference]: Finished difference Result 309 states and 652 transitions. [2021-11-03 05:48:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 05:48:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 05:48:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:38,139 INFO L225 Difference]: With dead ends: 309 [2021-11-03 05:48:38,139 INFO L226 Difference]: Without dead ends: 252 [2021-11-03 05:48:38,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 85.4s TimeCoverageRelationStatistics Valid=77, Invalid=156, Unknown=11, NotChecked=28, Total=272 [2021-11-03 05:48:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-03 05:48:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 205. [2021-11-03 05:48:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 202 states have (on average 2.267326732673267) internal successors, (458), 204 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 458 transitions. [2021-11-03 05:48:38,152 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 458 transitions. Word has length 15 [2021-11-03 05:48:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:38,153 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 458 transitions. [2021-11-03 05:48:38,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 458 transitions. [2021-11-03 05:48:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 05:48:38,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:38,155 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:48:38,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:38,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:48:38,356 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:48:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:38,357 INFO L85 PathProgramCache]: Analyzing trace with hash 628987161, now seen corresponding path program 1 times [2021-11-03 05:48:38,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:48:38,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141452842] [2021-11-03 05:48:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:38,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:48:38,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:48:38,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230294327] [2021-11-03 05:48:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:38,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:48:38,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:48:38,385 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:48:38,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 05:48:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:38,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-03 05:48:38,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:48:39,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:48:49,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:48:49,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141452842] [2021-11-03 05:48:49,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:48:49,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230294327] [2021-11-03 05:48:49,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230294327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:48:49,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579573104] [2021-11-03 05:48:49,458 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$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:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-03 05:48:49,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:48:49,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-11-03 05:48:49,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828233742] [2021-11-03 05:48:49,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:48:49,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:48:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:48:49,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=33, Unknown=2, NotChecked=0, Total=56 [2021-11-03 05:48:49,460 INFO L87 Difference]: Start difference. First operand 205 states and 458 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:02,484 WARN L207 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-11-03 05:49:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:20,179 INFO L93 Difference]: Finished difference Result 360 states and 767 transitions. [2021-11-03 05:49:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:49:20,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 05:49:20,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:20,183 INFO L225 Difference]: With dead ends: 360 [2021-11-03 05:49:20,183 INFO L226 Difference]: Without dead ends: 324 [2021-11-03 05:49:20,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=34, Invalid=53, Unknown=3, NotChecked=0, Total=90 [2021-11-03 05:49:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-03 05:49:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 253. [2021-11-03 05:49:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 250 states have (on average 2.328) internal successors, (582), 252 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 582 transitions. [2021-11-03 05:49:20,197 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 582 transitions. Word has length 15 [2021-11-03 05:49:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:20,197 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 582 transitions. [2021-11-03 05:49:20,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 582 transitions. [2021-11-03 05:49:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 05:49:20,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:20,199 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:49:20,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:20,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-03 05:49:20,414 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:49:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash 711915427, now seen corresponding path program 2 times [2021-11-03 05:49:20,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:49:20,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993466036] [2021-11-03 05:49:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:20,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:49:20,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:49:20,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151183966] [2021-11-03 05:49:20,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:49:20,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:49:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:49:20,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:49:20,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 05:49:20,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-03 05:49:20,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:49:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-03 05:49:20,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:49:21,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:49:36,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:49:36,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993466036] [2021-11-03 05:49:36,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:49:36,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151183966] [2021-11-03 05:49:36,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151183966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:36,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1728442630] [2021-11-03 05:49:36,783 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$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:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-03 05:49:36,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:49:36,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-03 05:49:36,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067051346] [2021-11-03 05:49:36,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:49:36,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:49:36,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:49:36,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=52, Unknown=6, NotChecked=0, Total=90 [2021-11-03 05:49:36,788 INFO L87 Difference]: Start difference. First operand 253 states and 582 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:53,259 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_ULTIMATE.start_main_~a_in~0 4294967296)) (.cse1 (mod c_~b~0 4294967296)) (.cse2 (mod c_~a~0 4294967296))) (and (< 0 .cse0) (or (and (<= .cse0 .cse1) (= c_ULTIMATE.start_main_~a_in~0 c_~a~0)) (and (= (+ c_~b~0 c_~a~0) c_ULTIMATE.start_main_~a_in~0) (< .cse1 .cse0))) (< .cse2 .cse0) (or (= (mod (mod .cse0 .cse1) 4294967296) 0) (and (not (= (mod (+ (* c_~a~0 4294967295) .cse1) (- 4294967296)) 0)) (or (<= .cse2 .cse1) (not (= (mod (+ (* .cse1 4294967295) c_~a~0 (* c_~b~0 4294967295)) 4294967296) 0))))) (< 0 .cse1) (not (= .cse0 .cse1)) (= (mod (+ c_~a~0 .cse2 (* c_ULTIMATE.start_main_~a_in~0 4294967295)) (- 4294967296)) 0))) is different from false [2021-11-03 05:51:07,225 WARN L207 SmtUtils]: Spent 19.79 s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-03 05:51:34,261 WARN L207 SmtUtils]: Spent 16.72 s on a formula simplification that was a NOOP. DAG size: 32 [2021-11-03 05:52:05,383 WARN L207 SmtUtils]: Spent 10.91 s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 05:53:13,027 WARN L207 SmtUtils]: Spent 8.65 s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-03 05:53:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:53:38,415 INFO L93 Difference]: Finished difference Result 493 states and 1057 transitions. [2021-11-03 05:53:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:53:38,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 05:53:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:53:38,424 INFO L225 Difference]: With dead ends: 493 [2021-11-03 05:53:38,424 INFO L226 Difference]: Without dead ends: 479 [2021-11-03 05:53:38,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 97.6s TimeCoverageRelationStatistics Valid=69, Invalid=129, Unknown=16, NotChecked=26, Total=240 [2021-11-03 05:53:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-03 05:53:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 291. [2021-11-03 05:53:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 288 states have (on average 2.4305555555555554) internal successors, (700), 290 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 700 transitions. [2021-11-03 05:53:38,441 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 700 transitions. Word has length 15 [2021-11-03 05:53:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:53:38,441 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 700 transitions. [2021-11-03 05:53:38,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:38,442 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 700 transitions. [2021-11-03 05:53:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 05:53:38,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:53:38,443 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:53:38,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:38,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-03 05:53:38,650 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:53:38,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:53:38,652 INFO L85 PathProgramCache]: Analyzing trace with hash 143076191, now seen corresponding path program 3 times [2021-11-03 05:53:38,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:53:38,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564317271] [2021-11-03 05:53:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:38,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:53:38,738 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:53:38,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864842653] [2021-11-03 05:53:38,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 05:53:38,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:53:38,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:53:38,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:53:38,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 05:53:39,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 05:53:39,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:53:39,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-03 05:53:39,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:53:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:53:39,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:53:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:53:56,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:53:56,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564317271] [2021-11-03 05:53:56,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:53:56,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864842653] [2021-11-03 05:53:56,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864842653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:53:56,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011626137] [2021-11-03 05:53:56,431 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$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:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-03 05:53:56,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:53:56,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-03 05:53:56,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727663459] [2021-11-03 05:53:56,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:53:56,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:53:56,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:53:56,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=54, Unknown=5, NotChecked=0, Total=90 [2021-11-03 05:53:56,434 INFO L87 Difference]: Start difference. First operand 291 states and 700 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:54:18,111 WARN L207 SmtUtils]: Spent 14.69 s on a formula simplification that was a NOOP. DAG size: 40 [2021-11-03 05:54:32,827 WARN L207 SmtUtils]: Spent 9.32 s on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2021-11-03 05:55:20,246 WARN L207 SmtUtils]: Spent 14.89 s on a formula simplification that was a NOOP. DAG size: 32 [2021-11-03 05:56:11,830 WARN L207 SmtUtils]: Spent 8.22 s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-03 05:56:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:56:18,405 INFO L93 Difference]: Finished difference Result 518 states and 1129 transitions. [2021-11-03 05:56:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:56:18,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 05:56:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:56:18,417 INFO L225 Difference]: With dead ends: 518 [2021-11-03 05:56:18,418 INFO L226 Difference]: Without dead ends: 494 [2021-11-03 05:56:18,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 81.2s TimeCoverageRelationStatistics Valid=78, Invalid=151, Unknown=11, NotChecked=0, Total=240 [2021-11-03 05:56:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-03 05:56:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 321. [2021-11-03 05:56:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 318 states have (on average 2.393081761006289) internal successors, (761), 320 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:56:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 761 transitions. [2021-11-03 05:56:18,437 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 761 transitions. Word has length 15 [2021-11-03 05:56:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:56:18,438 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 761 transitions. [2021-11-03 05:56:18,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:56:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 761 transitions. [2021-11-03 05:56:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 05:56:18,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:56:18,440 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:56:18,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:56:18,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:56:18,647 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:56:18,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:56:18,647 INFO L85 PathProgramCache]: Analyzing trace with hash 463366076, now seen corresponding path program 1 times [2021-11-03 05:56:18,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:56:18,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347071999] [2021-11-03 05:56:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:56:18,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:56:18,679 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:56:18,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882296282] [2021-11-03 05:56:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:56:18,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:56:18,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:56:18,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:56:18,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b8263-8fe0-4242-b7c9-223bc4487496/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-03 05:56:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:56:33,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-03 05:56:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:56:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:56:39,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:56:42,171 WARN L838 $PredicateComparison]: unable to prove that (forall ((aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_79_61_72 Int) (aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_79_61_72 Int)) (let ((.cse0 (+ (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_79_61_72) aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_79_61_72)) (.cse1 (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_79_61_72 4294967296))) (or (<= 4294967296 .cse0) (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_79_61_72 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse1) 4294967296) 0)) (<= .cse0 1) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse1) 4294967296) 0)) (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_79_61_72)))) is different from false [2021-11-03 05:57:53,705 WARN L207 SmtUtils]: Spent 5.17 s on a formula simplification that was a NOOP. DAG size: 101 [2021-11-03 05:58:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-03 05:58:15,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:58:15,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347071999] [2021-11-03 05:58:15,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:58:15,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882296282] [2021-11-03 05:58:15,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882296282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:58:15,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900777303] [2021-11-03 05:58:15,550 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$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:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-03 05:58:15,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:58:15,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-03 05:58:15,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072117461] [2021-11-03 05:58:15,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:58:15,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:58:15,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:58:15,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=66, Unknown=17, NotChecked=18, Total=132 [2021-11-03 05:58:15,552 INFO L87 Difference]: Start difference. First operand 321 states and 761 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)