./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/01b_inc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/01b_inc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:57:01,973 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:57:02,065 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:57:02,069 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:57:02,070 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:57:02,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:57:02,097 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:57:02,097 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:57:02,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:57:02,099 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:57:02,099 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:57:02,100 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:57:02,101 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:57:02,101 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:57:02,102 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:57:02,103 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:57:02,103 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:57:02,104 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:57:02,105 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:57:02,105 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:57:02,106 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:57:02,110 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:57:02,111 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:57:02,112 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:57:02,112 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:57:02,113 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:57:02,114 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:57:02,114 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:57:02,115 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:57:02,115 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:57:02,116 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:57:02,116 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:57:02,117 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:57:02,117 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:57:02,118 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:57:02,118 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:57:02,119 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:57:02,119 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:57:02,120 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:57:02,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:57:02,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:57:02,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:57:02,122 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:57:02,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:57:02,123 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:57:02,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:57:02,124 INFO L153 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_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 [2023-11-06 20:57:02,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:57:02,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:57:02,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:57:02,448 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:57:02,450 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:57:02,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/pthread-ext/01b_inc.i [2023-11-06 20:57:05,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:57:06,003 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:57:06,008 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/sv-benchmarks/c/pthread-ext/01b_inc.i [2023-11-06 20:57:06,028 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/data/65cbd1701/6875514c06d04214b7e691f0c5d46256/FLAGecbc48c35 [2023-11-06 20:57:06,046 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/data/65cbd1701/6875514c06d04214b7e691f0c5d46256 [2023-11-06 20:57:06,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:57:06,055 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:57:06,059 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:57:06,059 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:57:06,064 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:57:06,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,066 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@730a78ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06, skipping insertion in model container [2023-11-06 20:57:06,066 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,135 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:57:06,302 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-06 20:57:06,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:57:06,508 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:57:06,534 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-06 20:57:06,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:57:06,615 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:57:06,615 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:57:06,615 WARN L672 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:57:06,623 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:57:06,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06 WrapperNode [2023-11-06 20:57:06,624 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:57:06,625 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:57:06,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:57:06,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:57:06,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,647 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,672 INFO L138 Inliner]: procedures = 173, calls = 21, calls flagged for inlining = 8, calls inlined = 9, statements flattened = 64 [2023-11-06 20:57:06,672 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:57:06,673 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:57:06,673 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:57:06,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:57:06,684 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,707 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,708 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,716 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,733 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,735 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,737 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,740 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:57:06,741 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:57:06,741 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:57:06,741 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:57:06,742 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (1/1) ... [2023-11-06 20:57:06,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:57:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:57:06,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:57:06,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af5b766e-0c68-470f-af40-24ee36fb5fce/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:57:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 20:57:06,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 20:57:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:57:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 20:57:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:57:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:57:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:57:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:57:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 20:57:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:57:06,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:57:06,842 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 20:57:07,028 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:57:07,030 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:57:07,232 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:57:07,306 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:57:07,307 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 20:57:07,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:57:07 BoogieIcfgContainer [2023-11-06 20:57:07,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:57:07,336 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:57:07,337 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:57:07,340 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:57:07,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:57:06" (1/3) ... [2023-11-06 20:57:07,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f76e7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:57:07, skipping insertion in model container [2023-11-06 20:57:07,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:57:06" (2/3) ... [2023-11-06 20:57:07,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f76e7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:57:07, skipping insertion in model container [2023-11-06 20:57:07,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:57:07" (3/3) ... [2023-11-06 20:57:07,345 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2023-11-06 20:57:07,364 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:57:07,364 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-06 20:57:07,364 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 20:57:07,434 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 20:57:07,475 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 20:57:07,497 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 46 transitions, 96 flow [2023-11-06 20:57:07,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 47 places, 46 transitions, 96 flow [2023-11-06 20:57:07,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 96 flow [2023-11-06 20:57:07,555 INFO L124 PetriNetUnfolderBase]: 3/62 cut-off events. [2023-11-06 20:57:07,558 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 20:57:07,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 62 events. 3/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 125 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 32. Up to 4 conditions per place. [2023-11-06 20:57:07,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 532 [2023-11-06 20:57:09,840 INFO L134 LiptonReduction]: Checked pairs total: 487 [2023-11-06 20:57:09,841 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-11-06 20:57:09,850 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 11 transitions, 26 flow [2023-11-06 20:57:09,862 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 17 states have (on average 2.411764705882353) internal successors, (41), 28 states have internal predecessors, (41), 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) [2023-11-06 20:57:09,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:57:09,887 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4cee041a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:57:09,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 20:57:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 2.411764705882353) internal successors, (41), 28 states have internal predecessors, (41), 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) [2023-11-06 20:57:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:57:09,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:09,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:57:09,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-06 20:57:09,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:09,901 INFO L85 PathProgramCache]: Analyzing trace with hash 9205, now seen corresponding path program 1 times [2023-11-06 20:57:09,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:09,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356158222] [2023-11-06 20:57:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:09,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:10,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:10,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356158222] [2023-11-06 20:57:10,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356158222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:10,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:10,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:57:10,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657041300] [2023-11-06 20:57:10,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:10,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 20:57:10,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:10,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 20:57:10,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:57:10,098 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 2.411764705882353) internal successors, (41), 28 states have internal predecessors, (41), 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 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:10,125 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2023-11-06 20:57:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 20:57:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:57:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:10,136 INFO L225 Difference]: With dead ends: 17 [2023-11-06 20:57:10,136 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 20:57:10,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:57:10,141 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:10,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 20:57:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 20:57:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.75) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-11-06 20:57:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-06 20:57:10,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 2 [2023-11-06 20:57:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:10,175 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-06 20:57:10,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-06 20:57:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:57:10,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:10,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:57:10,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:57:10,177 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-06 20:57:10,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:10,178 INFO L85 PathProgramCache]: Analyzing trace with hash 9211, now seen corresponding path program 1 times [2023-11-06 20:57:10,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:10,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564722601] [2023-11-06 20:57:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:10,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:10,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:10,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564722601] [2023-11-06 20:57:10,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564722601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:10,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:10,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:57:10,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886986677] [2023-11-06 20:57:10,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:10,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:57:10,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:10,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:57:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:10,299 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:10,313 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2023-11-06 20:57:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:57:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:57:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:10,315 INFO L225 Difference]: With dead ends: 14 [2023-11-06 20:57:10,315 INFO L226 Difference]: Without dead ends: 14 [2023-11-06 20:57:10,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:10,319 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:10,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-06 20:57:10,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-06 20:57:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 13 states have internal predecessors, (17), 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) [2023-11-06 20:57:10,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-06 20:57:10,330 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 2 [2023-11-06 20:57:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:10,330 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-06 20:57:10,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-06 20:57:10,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:57:10,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:10,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:57:10,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:57:10,332 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-06 20:57:10,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:10,334 INFO L85 PathProgramCache]: Analyzing trace with hash 9212, now seen corresponding path program 1 times [2023-11-06 20:57:10,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:10,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811928412] [2023-11-06 20:57:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:10,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:10,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:10,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811928412] [2023-11-06 20:57:10,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811928412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:10,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:10,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:57:10,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415292787] [2023-11-06 20:57:10,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:10,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:57:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:10,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:57:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:10,552 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:10,567 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2023-11-06 20:57:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:57:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:57:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:10,568 INFO L225 Difference]: With dead ends: 11 [2023-11-06 20:57:10,568 INFO L226 Difference]: Without dead ends: 11 [2023-11-06 20:57:10,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:10,572 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:10,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:10,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-06 20:57:10,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-06 20:57:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2023-11-06 20:57:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-06 20:57:10,579 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 2 [2023-11-06 20:57:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:10,580 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-06 20:57:10,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-06 20:57:10,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:57:10,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:10,581 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 20:57:10,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:57:10,581 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-06 20:57:10,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:10,582 INFO L85 PathProgramCache]: Analyzing trace with hash -77708611, now seen corresponding path program 1 times [2023-11-06 20:57:10,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:10,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262300052] [2023-11-06 20:57:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 20:57:10,624 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 20:57:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 20:57:10,669 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-06 20:57:10,669 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 20:57:10,670 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-06 20:57:10,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-06 20:57:10,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-06 20:57:10,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-06 20:57:10,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-06 20:57:10,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-06 20:57:10,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:57:10,676 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-06 20:57:10,684 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 20:57:10,684 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 20:57:10,714 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 20:57:10,727 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 20:57:10,728 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 61 transitions, 132 flow [2023-11-06 20:57:10,728 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 61 transitions, 132 flow [2023-11-06 20:57:10,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 132 flow [2023-11-06 20:57:10,772 INFO L124 PetriNetUnfolderBase]: 5/95 cut-off events. [2023-11-06 20:57:10,772 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 20:57:10,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 95 events. 5/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 223 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 63. Up to 6 conditions per place. [2023-11-06 20:57:10,777 INFO L119 LiptonReduction]: Number of co-enabled transitions 1484 [2023-11-06 20:57:12,257 INFO L134 LiptonReduction]: Checked pairs total: 5231 [2023-11-06 20:57:12,257 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-11-06 20:57:12,258 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 68 flow [2023-11-06 20:57:12,324 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 801 states, 772 states have (on average 2.895077720207254) internal successors, (2235), 800 states have internal predecessors, (2235), 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) [2023-11-06 20:57:12,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:57:12,327 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4cee041a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:57:12,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 20:57:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 801 states, 772 states have (on average 2.895077720207254) internal successors, (2235), 800 states have internal predecessors, (2235), 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) [2023-11-06 20:57:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:57:12,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:12,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:57:12,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 20:57:12,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:12,332 INFO L85 PathProgramCache]: Analyzing trace with hash 12957, now seen corresponding path program 1 times [2023-11-06 20:57:12,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:12,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020593490] [2023-11-06 20:57:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:12,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:12,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:12,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020593490] [2023-11-06 20:57:12,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020593490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:12,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:12,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:57:12,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759389246] [2023-11-06 20:57:12,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:12,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:57:12,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:12,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:57:12,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:12,389 INFO L87 Difference]: Start difference. First operand has 801 states, 772 states have (on average 2.895077720207254) internal successors, (2235), 800 states have internal predecessors, (2235), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:12,447 INFO L93 Difference]: Finished difference Result 535 states and 1471 transitions. [2023-11-06 20:57:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:57:12,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:57:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:12,459 INFO L225 Difference]: With dead ends: 535 [2023-11-06 20:57:12,460 INFO L226 Difference]: Without dead ends: 535 [2023-11-06 20:57:12,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:12,461 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:12,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-11-06 20:57:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2023-11-06 20:57:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 524 states have (on average 2.8072519083969465) internal successors, (1471), 534 states have internal predecessors, (1471), 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) [2023-11-06 20:57:12,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1471 transitions. [2023-11-06 20:57:12,522 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1471 transitions. Word has length 2 [2023-11-06 20:57:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:12,523 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 1471 transitions. [2023-11-06 20:57:12,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:12,523 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1471 transitions. [2023-11-06 20:57:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:57:12,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:12,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:57:12,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:57:12,525 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 20:57:12,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:12,525 INFO L85 PathProgramCache]: Analyzing trace with hash 12958, now seen corresponding path program 1 times [2023-11-06 20:57:12,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:12,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407558530] [2023-11-06 20:57:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:12,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:12,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:12,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407558530] [2023-11-06 20:57:12,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407558530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:12,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:12,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:57:12,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597126252] [2023-11-06 20:57:12,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:57:12,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:57:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:12,582 INFO L87 Difference]: Start difference. First operand 535 states and 1471 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:12,612 INFO L93 Difference]: Finished difference Result 444 states and 1209 transitions. [2023-11-06 20:57:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:57:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:57:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:12,618 INFO L225 Difference]: With dead ends: 444 [2023-11-06 20:57:12,619 INFO L226 Difference]: Without dead ends: 444 [2023-11-06 20:57:12,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:12,620 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:12,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 11 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:12,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-11-06 20:57:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2023-11-06 20:57:12,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 440 states have (on average 2.7477272727272726) internal successors, (1209), 443 states have internal predecessors, (1209), 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) [2023-11-06 20:57:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1209 transitions. [2023-11-06 20:57:12,653 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1209 transitions. Word has length 2 [2023-11-06 20:57:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:12,654 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 1209 transitions. [2023-11-06 20:57:12,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1209 transitions. [2023-11-06 20:57:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 20:57:12,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:12,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:12,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:57:12,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 20:57:12,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:12,657 INFO L85 PathProgramCache]: Analyzing trace with hash -243679945, now seen corresponding path program 1 times [2023-11-06 20:57:12,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:12,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039972939] [2023-11-06 20:57:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:12,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:12,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:12,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039972939] [2023-11-06 20:57:12,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039972939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:12,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:12,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:57:12,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504027793] [2023-11-06 20:57:12,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:12,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:57:12,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:12,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:57:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:57:12,967 INFO L87 Difference]: Start difference. First operand 444 states and 1209 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-06 20:57:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:13,142 INFO L93 Difference]: Finished difference Result 526 states and 1306 transitions. [2023-11-06 20:57:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:57:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2023-11-06 20:57:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:13,148 INFO L225 Difference]: With dead ends: 526 [2023-11-06 20:57:13,148 INFO L226 Difference]: Without dead ends: 526 [2023-11-06 20:57:13,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:57:13,151 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:13,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 26 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:57:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-06 20:57:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 426. [2023-11-06 20:57:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 422 states have (on average 2.585308056872038) internal successors, (1091), 425 states have internal predecessors, (1091), 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) [2023-11-06 20:57:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1091 transitions. [2023-11-06 20:57:13,175 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1091 transitions. Word has length 9 [2023-11-06 20:57:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:13,175 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 1091 transitions. [2023-11-06 20:57:13,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-06 20:57:13,176 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1091 transitions. [2023-11-06 20:57:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:57:13,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:13,178 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 20:57:13,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:57:13,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 20:57:13,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1758416527, now seen corresponding path program 1 times [2023-11-06 20:57:13,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:13,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520580985] [2023-11-06 20:57:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 20:57:13,199 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 20:57:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 20:57:13,223 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-06 20:57:13,223 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 20:57:13,224 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-06 20:57:13,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-06 20:57:13,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-06 20:57:13,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-06 20:57:13,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-06 20:57:13,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-06 20:57:13,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-06 20:57:13,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:57:13,226 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-06 20:57:13,226 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 20:57:13,226 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 20:57:13,270 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 20:57:13,273 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 20:57:13,273 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 76 transitions, 170 flow [2023-11-06 20:57:13,274 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 76 transitions, 170 flow [2023-11-06 20:57:13,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 76 transitions, 170 flow [2023-11-06 20:57:13,305 INFO L124 PetriNetUnfolderBase]: 7/128 cut-off events. [2023-11-06 20:57:13,306 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 20:57:13,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 128 events. 7/128 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 337 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 99. Up to 8 conditions per place. [2023-11-06 20:57:13,312 INFO L119 LiptonReduction]: Number of co-enabled transitions 2856 [2023-11-06 20:57:15,024 INFO L134 LiptonReduction]: Checked pairs total: 10427 [2023-11-06 20:57:15,025 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-11-06 20:57:15,027 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 39 transitions, 96 flow [2023-11-06 20:57:15,383 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7273 states, 7209 states have (on average 3.8207795810792065) internal successors, (27544), 7272 states have internal predecessors, (27544), 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) [2023-11-06 20:57:15,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:57:15,391 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4cee041a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:57:15,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-06 20:57:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 7273 states, 7209 states have (on average 3.8207795810792065) internal successors, (27544), 7272 states have internal predecessors, (27544), 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) [2023-11-06 20:57:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:57:15,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:15,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:57:15,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 20:57:15,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:15,439 INFO L85 PathProgramCache]: Analyzing trace with hash 17274, now seen corresponding path program 1 times [2023-11-06 20:57:15,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:15,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731087076] [2023-11-06 20:57:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:15,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:15,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:15,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731087076] [2023-11-06 20:57:15,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731087076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:15,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:15,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:57:15,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889695241] [2023-11-06 20:57:15,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:15,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 20:57:15,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 20:57:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:57:15,484 INFO L87 Difference]: Start difference. First operand has 7273 states, 7209 states have (on average 3.8207795810792065) internal successors, (27544), 7272 states have internal predecessors, (27544), 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 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:15,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:15,705 INFO L93 Difference]: Finished difference Result 5648 states and 21254 transitions. [2023-11-06 20:57:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 20:57:15,708 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:57:15,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:15,862 INFO L225 Difference]: With dead ends: 5648 [2023-11-06 20:57:15,862 INFO L226 Difference]: Without dead ends: 5648 [2023-11-06 20:57:15,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:57:15,863 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:15,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2023-11-06 20:57:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5648. [2023-11-06 20:57:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5648 states, 5610 states have (on average 3.7885918003565062) internal successors, (21254), 5647 states have internal predecessors, (21254), 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) [2023-11-06 20:57:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5648 states to 5648 states and 21254 transitions. [2023-11-06 20:57:16,233 INFO L78 Accepts]: Start accepts. Automaton has 5648 states and 21254 transitions. Word has length 2 [2023-11-06 20:57:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:16,233 INFO L495 AbstractCegarLoop]: Abstraction has 5648 states and 21254 transitions. [2023-11-06 20:57:16,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 5648 states and 21254 transitions. [2023-11-06 20:57:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:57:16,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:16,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:57:16,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 20:57:16,235 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 20:57:16,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:16,235 INFO L85 PathProgramCache]: Analyzing trace with hash 17278, now seen corresponding path program 1 times [2023-11-06 20:57:16,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:16,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747065751] [2023-11-06 20:57:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:16,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:16,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:16,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747065751] [2023-11-06 20:57:16,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747065751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:16,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:16,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:57:16,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601875574] [2023-11-06 20:57:16,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:57:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:57:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:16,258 INFO L87 Difference]: Start difference. First operand 5648 states and 21254 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:16,355 INFO L93 Difference]: Finished difference Result 4828 states and 18076 transitions. [2023-11-06 20:57:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:57:16,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:57:16,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:16,495 INFO L225 Difference]: With dead ends: 4828 [2023-11-06 20:57:16,495 INFO L226 Difference]: Without dead ends: 4828 [2023-11-06 20:57:16,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:16,496 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:16,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2023-11-06 20:57:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4828. [2023-11-06 20:57:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4805 states have (on average 3.761914672216441) internal successors, (18076), 4827 states have internal predecessors, (18076), 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) [2023-11-06 20:57:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 18076 transitions. [2023-11-06 20:57:16,771 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 18076 transitions. Word has length 2 [2023-11-06 20:57:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:16,772 INFO L495 AbstractCegarLoop]: Abstraction has 4828 states and 18076 transitions. [2023-11-06 20:57:16,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 18076 transitions. [2023-11-06 20:57:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:57:16,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:16,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:57:16,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 20:57:16,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 20:57:16,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:16,774 INFO L85 PathProgramCache]: Analyzing trace with hash 17279, now seen corresponding path program 1 times [2023-11-06 20:57:16,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:16,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496016902] [2023-11-06 20:57:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:16,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:16,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:16,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496016902] [2023-11-06 20:57:16,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496016902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:16,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:16,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:57:16,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953417711] [2023-11-06 20:57:16,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:16,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:57:16,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:57:16,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:16,812 INFO L87 Difference]: Start difference. First operand 4828 states and 18076 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:16,897 INFO L93 Difference]: Finished difference Result 4008 states and 14898 transitions. [2023-11-06 20:57:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:57:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:57:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:16,942 INFO L225 Difference]: With dead ends: 4008 [2023-11-06 20:57:16,942 INFO L226 Difference]: Without dead ends: 4008 [2023-11-06 20:57:16,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:16,944 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:16,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:16,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2023-11-06 20:57:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 4008. [2023-11-06 20:57:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4000 states have (on average 3.7245) internal successors, (14898), 4007 states have internal predecessors, (14898), 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) [2023-11-06 20:57:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 14898 transitions. [2023-11-06 20:57:17,183 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 14898 transitions. Word has length 2 [2023-11-06 20:57:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:17,184 INFO L495 AbstractCegarLoop]: Abstraction has 4008 states and 14898 transitions. [2023-11-06 20:57:17,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 14898 transitions. [2023-11-06 20:57:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 20:57:17,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:17,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:17,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 20:57:17,186 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 20:57:17,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash -348433824, now seen corresponding path program 1 times [2023-11-06 20:57:17,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:17,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826833706] [2023-11-06 20:57:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:17,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:17,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:17,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826833706] [2023-11-06 20:57:17,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826833706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:17,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:17,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:57:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813898506] [2023-11-06 20:57:17,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:17,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:57:17,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:17,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:57:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:57:17,292 INFO L87 Difference]: Start difference. First operand 4008 states and 14898 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-06 20:57:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:17,587 INFO L93 Difference]: Finished difference Result 5882 states and 20479 transitions. [2023-11-06 20:57:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:57:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2023-11-06 20:57:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:17,618 INFO L225 Difference]: With dead ends: 5882 [2023-11-06 20:57:17,618 INFO L226 Difference]: Without dead ends: 5882 [2023-11-06 20:57:17,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:57:17,620 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:17,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 32 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:57:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2023-11-06 20:57:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 4402. [2023-11-06 20:57:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4402 states, 4394 states have (on average 3.5914883932635413) internal successors, (15781), 4401 states have internal predecessors, (15781), 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) [2023-11-06 20:57:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4402 states to 4402 states and 15781 transitions. [2023-11-06 20:57:17,872 INFO L78 Accepts]: Start accepts. Automaton has 4402 states and 15781 transitions. Word has length 9 [2023-11-06 20:57:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:17,873 INFO L495 AbstractCegarLoop]: Abstraction has 4402 states and 15781 transitions. [2023-11-06 20:57:17,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-06 20:57:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 4402 states and 15781 transitions. [2023-11-06 20:57:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 20:57:17,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:17,875 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:17,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 20:57:17,875 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 20:57:17,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash 205286648, now seen corresponding path program 1 times [2023-11-06 20:57:17,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:17,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258022438] [2023-11-06 20:57:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:17,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:57:17,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:17,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258022438] [2023-11-06 20:57:17,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258022438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:17,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:17,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:57:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121460387] [2023-11-06 20:57:17,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:17,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:57:17,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:57:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:57:17,987 INFO L87 Difference]: Start difference. First operand 4402 states and 15781 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-11-06 20:57:18,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:18,213 INFO L93 Difference]: Finished difference Result 6927 states and 24038 transitions. [2023-11-06 20:57:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:57:18,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 [2023-11-06 20:57:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:18,386 INFO L225 Difference]: With dead ends: 6927 [2023-11-06 20:57:18,400 INFO L226 Difference]: Without dead ends: 6927 [2023-11-06 20:57:18,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:57:18,407 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:18,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 36 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:57:18,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6927 states. [2023-11-06 20:57:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6927 to 5187. [2023-11-06 20:57:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 5179 states have (on average 3.5715389071249275) internal successors, (18497), 5186 states have internal predecessors, (18497), 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) [2023-11-06 20:57:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 18497 transitions. [2023-11-06 20:57:18,822 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 18497 transitions. Word has length 13 [2023-11-06 20:57:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:18,822 INFO L495 AbstractCegarLoop]: Abstraction has 5187 states and 18497 transitions. [2023-11-06 20:57:18,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-11-06 20:57:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 18497 transitions. [2023-11-06 20:57:18,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:57:18,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:18,831 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 20:57:18,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 20:57:18,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 20:57:18,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2140055882, now seen corresponding path program 1 times [2023-11-06 20:57:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:18,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189360721] [2023-11-06 20:57:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 20:57:18,860 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 20:57:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 20:57:18,876 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-06 20:57:18,876 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 20:57:18,878 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-06 20:57:18,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-06 20:57:18,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-06 20:57:18,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-06 20:57:18,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-06 20:57:18,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-06 20:57:18,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-06 20:57:18,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-06 20:57:18,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 20:57:18,881 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-06 20:57:18,881 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 20:57:18,881 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 20:57:18,919 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 20:57:18,924 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 20:57:18,924 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 91 transitions, 210 flow [2023-11-06 20:57:18,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 91 transitions, 210 flow [2023-11-06 20:57:18,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 91 transitions, 210 flow [2023-11-06 20:57:19,063 INFO L124 PetriNetUnfolderBase]: 9/161 cut-off events. [2023-11-06 20:57:19,064 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 20:57:19,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 161 events. 9/161 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 427 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 136. Up to 10 conditions per place. [2023-11-06 20:57:19,081 INFO L119 LiptonReduction]: Number of co-enabled transitions 4648 [2023-11-06 20:57:21,275 INFO L134 LiptonReduction]: Checked pairs total: 17144 [2023-11-06 20:57:21,280 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-11-06 20:57:21,281 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 49 transitions, 126 flow [2023-11-06 20:57:24,179 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65577 states, 65442 states have (on average 4.797056935912717) internal successors, (313929), 65576 states have internal predecessors, (313929), 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) [2023-11-06 20:57:24,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:57:24,182 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4cee041a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:57:24,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-06 20:57:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 65577 states, 65442 states have (on average 4.797056935912717) internal successors, (313929), 65576 states have internal predecessors, (313929), 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) [2023-11-06 20:57:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:57:24,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:24,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:57:24,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-06 20:57:24,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash 22298, now seen corresponding path program 1 times [2023-11-06 20:57:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:24,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36826771] [2023-11-06 20:57:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:24,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:24,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36826771] [2023-11-06 20:57:24,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36826771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:24,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:24,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:57:24,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367328002] [2023-11-06 20:57:24,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:24,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 20:57:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:24,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 20:57:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:57:24,463 INFO L87 Difference]: Start difference. First operand has 65577 states, 65442 states have (on average 4.797056935912717) internal successors, (313929), 65576 states have internal predecessors, (313929), 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 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:25,575 INFO L93 Difference]: Finished difference Result 50846 states and 242141 transitions. [2023-11-06 20:57:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 20:57:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:57:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:26,555 INFO L225 Difference]: With dead ends: 50846 [2023-11-06 20:57:26,556 INFO L226 Difference]: Without dead ends: 50846 [2023-11-06 20:57:26,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:57:26,557 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:26,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50846 states. [2023-11-06 20:57:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50846 to 50846. [2023-11-06 20:57:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50846 states, 50768 states have (on average 4.769559565080366) internal successors, (242141), 50845 states have internal predecessors, (242141), 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) [2023-11-06 20:57:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50846 states to 50846 states and 242141 transitions. [2023-11-06 20:57:30,004 INFO L78 Accepts]: Start accepts. Automaton has 50846 states and 242141 transitions. Word has length 2 [2023-11-06 20:57:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:30,004 INFO L495 AbstractCegarLoop]: Abstraction has 50846 states and 242141 transitions. [2023-11-06 20:57:30,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 50846 states and 242141 transitions. [2023-11-06 20:57:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:57:30,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:30,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:57:30,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 20:57:30,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-06 20:57:30,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:30,005 INFO L85 PathProgramCache]: Analyzing trace with hash 22302, now seen corresponding path program 1 times [2023-11-06 20:57:30,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:57:30,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679694806] [2023-11-06 20:57:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:30,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:57:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:30,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:57:30,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679694806] [2023-11-06 20:57:30,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679694806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:30,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:30,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:57:30,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854667103] [2023-11-06 20:57:30,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:30,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:57:30,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:57:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:57:30,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:30,041 INFO L87 Difference]: Start difference. First operand 50846 states and 242141 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:57:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:30,962 INFO L93 Difference]: Finished difference Result 43465 states and 206158 transitions. [2023-11-06 20:57:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:57:30,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:57:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:31,287 INFO L225 Difference]: With dead ends: 43465 [2023-11-06 20:57:31,287 INFO L226 Difference]: Without dead ends: 43465 [2023-11-06 20:57:31,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:57:31,293 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:31,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43465 states.