./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:34:02,432 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:34:02,517 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 19:34:02,521 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:34:02,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:34:02,547 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:34:02,548 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:34:02,548 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:34:02,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:34:02,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:34:02,550 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:34:02,551 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:34:02,551 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:34:02,552 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:34:02,552 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:34:02,553 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:34:02,553 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:34:02,554 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:34:02,554 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:34:02,555 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:34:02,556 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:34:02,556 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:34:02,557 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 19:34:02,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 19:34:02,558 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:34:02,558 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:34:02,559 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:34:02,559 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:34:02,560 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:34:02,560 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 19:34:02,560 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 19:34:02,561 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 19:34:02,561 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:34:02,561 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 19:34:02,562 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 19:34:02,562 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:34:02,562 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:34:02,562 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:34:02,563 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:34:02,563 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:34:02,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:34:02,563 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:34:02,564 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:34:02,564 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:34:02,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:34:02,564 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:34:02,564 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:34:02,565 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:34:02,565 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_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2023-12-02 19:34:02,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:34:02,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:34:02,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:34:02,818 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:34:02,818 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:34:02,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-12-02 19:34:05,697 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:34:05,909 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:34:05,909 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-12-02 19:34:05,918 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/data/69e518d2e/4bc54d0e0da44fd39bc5f943f6ffbf7d/FLAG86ce37b32 [2023-12-02 19:34:05,931 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/data/69e518d2e/4bc54d0e0da44fd39bc5f943f6ffbf7d [2023-12-02 19:34:05,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:34:05,935 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:34:05,936 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:34:05,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:34:05,941 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:34:05,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:34:05" (1/1) ... [2023-12-02 19:34:05,942 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fe3a90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:05, skipping insertion in model container [2023-12-02 19:34:05,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:34:05" (1/1) ... [2023-12-02 19:34:05,968 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:34:06,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:34:06,153 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:34:06,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:34:06,205 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:34:06,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06 WrapperNode [2023-12-02 19:34:06,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:34:06,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:34:06,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:34:06,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:34:06,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,225 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,263 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 411 [2023-12-02 19:34:06,264 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:34:06,264 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:34:06,265 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:34:06,265 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:34:06,274 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,281 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,281 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,297 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,309 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,315 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:34:06,316 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:34:06,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:34:06,317 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:34:06,318 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (1/1) ... [2023-12-02 19:34:06,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:34:06,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:06,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:34:06,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:34:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:34:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:34:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:34:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:34:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-02 19:34:06,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-02 19:34:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-02 19:34:06,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-02 19:34:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:34:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 19:34:06,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:34:06,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:34:06,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:34:06,410 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 19:34:06,526 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:34:06,528 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:34:07,158 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:34:07,692 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:34:07,692 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 19:34:07,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:34:07 BoogieIcfgContainer [2023-12-02 19:34:07,693 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:34:07,696 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:34:07,696 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:34:07,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:34:07,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:34:05" (1/3) ... [2023-12-02 19:34:07,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca6b9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:34:07, skipping insertion in model container [2023-12-02 19:34:07,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:34:06" (2/3) ... [2023-12-02 19:34:07,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca6b9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:34:07, skipping insertion in model container [2023-12-02 19:34:07,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:34:07" (3/3) ... [2023-12-02 19:34:07,702 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-12-02 19:34:07,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:34:07,722 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-12-02 19:34:07,722 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 19:34:07,844 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-02 19:34:07,876 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 126 places, 139 transitions, 292 flow [2023-12-02 19:34:08,299 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9693 states, 8751 states have (on average 3.4608616158153356) internal successors, (30286), 9692 states have internal predecessors, (30286), 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) [2023-12-02 19:34:08,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:34:08,324 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;@78aa25cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:34:08,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-12-02 19:34:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 9693 states, 8751 states have (on average 3.4608616158153356) internal successors, (30286), 9692 states have internal predecessors, (30286), 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) [2023-12-02 19:34:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:34:08,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:08,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:34:08,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:08,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:08,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1303401, now seen corresponding path program 1 times [2023-12-02 19:34:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:08,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831862115] [2023-12-02 19:34:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:08,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:34:08,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831862115] [2023-12-02 19:34:08,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831862115] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:08,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:08,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:34:08,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607172436] [2023-12-02 19:34:08,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:08,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:34:08,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:34:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:34:08,708 INFO L87 Difference]: Start difference. First operand has 9693 states, 8751 states have (on average 3.4608616158153356) internal successors, (30286), 9692 states have internal predecessors, (30286), 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 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-12-02 19:34:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:09,083 INFO L93 Difference]: Finished difference Result 9689 states and 29842 transitions. [2023-12-02 19:34:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:34:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-12-02 19:34:09,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:09,214 INFO L225 Difference]: With dead ends: 9689 [2023-12-02 19:34:09,214 INFO L226 Difference]: Without dead ends: 9689 [2023-12-02 19:34:09,216 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 [2023-12-02 19:34:09,219 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:09,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9689 states. [2023-12-02 19:34:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9689 to 9689. [2023-12-02 19:34:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9689 states, 8750 states have (on average 3.4105142857142856) internal successors, (29842), 9688 states have internal predecessors, (29842), 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) [2023-12-02 19:34:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9689 states to 9689 states and 29842 transitions. [2023-12-02 19:34:09,753 INFO L78 Accepts]: Start accepts. Automaton has 9689 states and 29842 transitions. Word has length 3 [2023-12-02 19:34:09,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:09,753 INFO L495 AbstractCegarLoop]: Abstraction has 9689 states and 29842 transitions. [2023-12-02 19:34:09,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-12-02 19:34:09,754 INFO L276 IsEmpty]: Start isEmpty. Operand 9689 states and 29842 transitions. [2023-12-02 19:34:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:34:09,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:09,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:34:09,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:34:09,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:09,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:09,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1303402, now seen corresponding path program 1 times [2023-12-02 19:34:09,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:09,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515677695] [2023-12-02 19:34:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:09,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:34:09,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:09,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515677695] [2023-12-02 19:34:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515677695] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:09,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:09,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:34:09,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938879951] [2023-12-02 19:34:09,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:09,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:34:09,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:34:10,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:34:10,009 INFO L87 Difference]: Start difference. First operand 9689 states and 29842 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-12-02 19:34:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:10,424 INFO L93 Difference]: Finished difference Result 9693 states and 29846 transitions. [2023-12-02 19:34:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:34:10,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-12-02 19:34:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:10,527 INFO L225 Difference]: With dead ends: 9693 [2023-12-02 19:34:10,528 INFO L226 Difference]: Without dead ends: 9693 [2023-12-02 19:34:10,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:34:10,536 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:10,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 170 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:34:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9693 states. [2023-12-02 19:34:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9693 to 9693. [2023-12-02 19:34:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9693 states, 8754 states have (on average 3.4094128398446424) internal successors, (29846), 9692 states have internal predecessors, (29846), 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) [2023-12-02 19:34:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9693 states to 9693 states and 29846 transitions. [2023-12-02 19:34:10,961 INFO L78 Accepts]: Start accepts. Automaton has 9693 states and 29846 transitions. Word has length 3 [2023-12-02 19:34:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:10,961 INFO L495 AbstractCegarLoop]: Abstraction has 9693 states and 29846 transitions. [2023-12-02 19:34:10,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-12-02 19:34:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 9693 states and 29846 transitions. [2023-12-02 19:34:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 19:34:10,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:10,963 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-12-02 19:34:10,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:34:10,963 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:10,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:10,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1252610931, now seen corresponding path program 1 times [2023-12-02 19:34:10,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:10,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481697785] [2023-12-02 19:34:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:10,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:34:11,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:11,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481697785] [2023-12-02 19:34:11,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481697785] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282940135] [2023-12-02 19:34:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:11,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:11,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:11,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:11,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:34:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:11,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 19:34:11,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:11,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 19:34:11,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:11,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:11,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:11,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:11,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:11,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 19:34:11,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:11,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 19:34:11,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:11,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:34:11,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:34:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:34:11,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282940135] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:34:11,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1081537419] [2023-12-02 19:34:11,614 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:34:11,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:34:11,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-12-02 19:34:11,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657400538] [2023-12-02 19:34:11,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:34:11,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 19:34:11,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 19:34:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:34:11,618 INFO L87 Difference]: Start difference. First operand 9693 states and 29846 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2023-12-02 19:34:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:12,174 INFO L93 Difference]: Finished difference Result 9705 states and 29862 transitions. [2023-12-02 19:34:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:34:12,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 5 [2023-12-02 19:34:12,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:12,232 INFO L225 Difference]: With dead ends: 9705 [2023-12-02 19:34:12,232 INFO L226 Difference]: Without dead ends: 9705 [2023-12-02 19:34:12,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-12-02 19:34:12,234 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 10 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:12,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 266 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:34:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9705 states. [2023-12-02 19:34:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9705 to 9705. [2023-12-02 19:34:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9705 states, 8766 states have (on average 3.406570841889117) internal successors, (29862), 9704 states have internal predecessors, (29862), 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) [2023-12-02 19:34:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9705 states to 9705 states and 29862 transitions. [2023-12-02 19:34:12,637 INFO L78 Accepts]: Start accepts. Automaton has 9705 states and 29862 transitions. Word has length 5 [2023-12-02 19:34:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:12,637 INFO L495 AbstractCegarLoop]: Abstraction has 9705 states and 29862 transitions. [2023-12-02 19:34:12,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2023-12-02 19:34:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 9705 states and 29862 transitions. [2023-12-02 19:34:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 19:34:12,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:12,639 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-12-02 19:34:12,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:34:12,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:12,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:12,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1163439630, now seen corresponding path program 2 times [2023-12-02 19:34:12,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:12,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025869225] [2023-12-02 19:34:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:12,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:34:13,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:13,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025869225] [2023-12-02 19:34:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025869225] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185776783] [2023-12-02 19:34:13,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:34:13,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:13,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:13,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:34:13,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 19:34:13,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:34:13,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 19:34:13,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:13,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-12-02 19:34:13,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:13,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:13,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:13,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 19:34:13,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:13,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:13,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 19:34:13,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:13,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:34:13,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:34:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:34:13,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185776783] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:34:13,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560442167] [2023-12-02 19:34:13,758 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:34:13,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:34:13,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2023-12-02 19:34:13,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140891707] [2023-12-02 19:34:13,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:34:13,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:34:13,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:13,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:34:13,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-12-02 19:34:13,761 INFO L87 Difference]: Start difference. First operand 9705 states and 29862 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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) [2023-12-02 19:34:14,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:14,474 INFO L93 Difference]: Finished difference Result 9707 states and 29860 transitions. [2023-12-02 19:34:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 19:34:14,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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 11 [2023-12-02 19:34:14,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:14,526 INFO L225 Difference]: With dead ends: 9707 [2023-12-02 19:34:14,526 INFO L226 Difference]: Without dead ends: 9707 [2023-12-02 19:34:14,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-12-02 19:34:14,527 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 48 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:14,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 360 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:34:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9707 states. [2023-12-02 19:34:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9707 to 9705. [2023-12-02 19:34:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9705 states, 8768 states have (on average 3.405337591240876) internal successors, (29858), 9704 states have internal predecessors, (29858), 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) [2023-12-02 19:34:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9705 states to 9705 states and 29858 transitions. [2023-12-02 19:34:14,898 INFO L78 Accepts]: Start accepts. Automaton has 9705 states and 29858 transitions. Word has length 11 [2023-12-02 19:34:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:14,899 INFO L495 AbstractCegarLoop]: Abstraction has 9705 states and 29858 transitions. [2023-12-02 19:34:14,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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) [2023-12-02 19:34:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 9705 states and 29858 transitions. [2023-12-02 19:34:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 19:34:14,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:14,900 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2023-12-02 19:34:14,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:34:15,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:15,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:15,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1779886498, now seen corresponding path program 1 times [2023-12-02 19:34:15,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:15,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635074190] [2023-12-02 19:34:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:15,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 19:34:15,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:15,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635074190] [2023-12-02 19:34:15,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635074190] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:15,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:15,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:34:15,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021631578] [2023-12-02 19:34:15,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:15,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:34:15,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:15,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:34:15,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:15,352 INFO L87 Difference]: Start difference. First operand 9705 states and 29858 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-12-02 19:34:15,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:15,577 INFO L93 Difference]: Finished difference Result 7855 states and 23708 transitions. [2023-12-02 19:34:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:34:15,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 24 [2023-12-02 19:34:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:15,600 INFO L225 Difference]: With dead ends: 7855 [2023-12-02 19:34:15,600 INFO L226 Difference]: Without dead ends: 7855 [2023-12-02 19:34:15,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:15,601 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 240 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:15,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 92 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:15,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2023-12-02 19:34:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 7855. [2023-12-02 19:34:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7855 states, 7208 states have (on average 3.2891231964483905) internal successors, (23708), 7854 states have internal predecessors, (23708), 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) [2023-12-02 19:34:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7855 states to 7855 states and 23708 transitions. [2023-12-02 19:34:15,753 INFO L78 Accepts]: Start accepts. Automaton has 7855 states and 23708 transitions. Word has length 24 [2023-12-02 19:34:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:15,754 INFO L495 AbstractCegarLoop]: Abstraction has 7855 states and 23708 transitions. [2023-12-02 19:34:15,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-12-02 19:34:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 7855 states and 23708 transitions. [2023-12-02 19:34:15,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 19:34:15,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:15,754 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2023-12-02 19:34:15,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:34:15,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:15,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:15,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1779886497, now seen corresponding path program 1 times [2023-12-02 19:34:15,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:15,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779307654] [2023-12-02 19:34:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:15,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:15,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779307654] [2023-12-02 19:34:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779307654] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:15,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:15,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:34:15,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034770400] [2023-12-02 19:34:15,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:15,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:34:15,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:15,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:34:15,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:34:15,987 INFO L87 Difference]: Start difference. First operand 7855 states and 23708 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-12-02 19:34:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:16,163 INFO L93 Difference]: Finished difference Result 6005 states and 17558 transitions. [2023-12-02 19:34:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:34:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 24 [2023-12-02 19:34:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:16,181 INFO L225 Difference]: With dead ends: 6005 [2023-12-02 19:34:16,181 INFO L226 Difference]: Without dead ends: 6005 [2023-12-02 19:34:16,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:34:16,182 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 119 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:16,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 92 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2023-12-02 19:34:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 6005. [2023-12-02 19:34:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 5648 states have (on average 3.10871104815864) internal successors, (17558), 6004 states have internal predecessors, (17558), 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) [2023-12-02 19:34:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 17558 transitions. [2023-12-02 19:34:16,330 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 17558 transitions. Word has length 24 [2023-12-02 19:34:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:16,330 INFO L495 AbstractCegarLoop]: Abstraction has 6005 states and 17558 transitions. [2023-12-02 19:34:16,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-12-02 19:34:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 17558 transitions. [2023-12-02 19:34:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 19:34:16,331 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:16,331 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:16,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:34:16,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:16,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:16,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1069008651, now seen corresponding path program 1 times [2023-12-02 19:34:16,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:16,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061842836] [2023-12-02 19:34:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:16,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 19:34:16,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:16,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061842836] [2023-12-02 19:34:16,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061842836] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:16,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:16,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:34:16,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476760218] [2023-12-02 19:34:16,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:16,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:34:16,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:34:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:16,530 INFO L87 Difference]: Start difference. First operand 6005 states and 17558 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2023-12-02 19:34:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:16,689 INFO L93 Difference]: Finished difference Result 5919 states and 17372 transitions. [2023-12-02 19:34:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:34:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) Word has length 27 [2023-12-02 19:34:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:16,706 INFO L225 Difference]: With dead ends: 5919 [2023-12-02 19:34:16,706 INFO L226 Difference]: Without dead ends: 5919 [2023-12-02 19:34:16,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:16,707 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 226 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:16,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 88 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2023-12-02 19:34:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5919. [2023-12-02 19:34:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5919 states, 5596 states have (on average 3.104360257326662) internal successors, (17372), 5918 states have internal predecessors, (17372), 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) [2023-12-02 19:34:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5919 states to 5919 states and 17372 transitions. [2023-12-02 19:34:16,834 INFO L78 Accepts]: Start accepts. Automaton has 5919 states and 17372 transitions. Word has length 27 [2023-12-02 19:34:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:16,834 INFO L495 AbstractCegarLoop]: Abstraction has 5919 states and 17372 transitions. [2023-12-02 19:34:16,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2023-12-02 19:34:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5919 states and 17372 transitions. [2023-12-02 19:34:16,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 19:34:16,836 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:16,836 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:16,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 19:34:16,836 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:16,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1069008652, now seen corresponding path program 1 times [2023-12-02 19:34:16,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:16,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260679812] [2023-12-02 19:34:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:16,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 19:34:17,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:17,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260679812] [2023-12-02 19:34:17,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260679812] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:17,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158409010] [2023-12-02 19:34:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:17,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:17,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:17,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:17,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:34:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:17,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 19:34:17,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:17,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 19:34:17,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:17,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 19:34:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:17,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 19:34:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:17,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:34:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158409010] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:17,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:34:17,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-02 19:34:17,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094697058] [2023-12-02 19:34:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:17,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:34:17,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:34:17,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:34:17,583 INFO L87 Difference]: Start difference. First operand 5919 states and 17372 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-12-02 19:34:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:17,713 INFO L93 Difference]: Finished difference Result 5833 states and 17186 transitions. [2023-12-02 19:34:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:34:17,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 27 [2023-12-02 19:34:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:17,728 INFO L225 Difference]: With dead ends: 5833 [2023-12-02 19:34:17,728 INFO L226 Difference]: Without dead ends: 5833 [2023-12-02 19:34:17,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:34:17,729 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 116 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:17,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 44 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2023-12-02 19:34:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 5833. [2023-12-02 19:34:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5833 states, 5544 states have (on average 3.09992784992785) internal successors, (17186), 5832 states have internal predecessors, (17186), 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) [2023-12-02 19:34:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5833 states to 5833 states and 17186 transitions. [2023-12-02 19:34:17,838 INFO L78 Accepts]: Start accepts. Automaton has 5833 states and 17186 transitions. Word has length 27 [2023-12-02 19:34:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:17,839 INFO L495 AbstractCegarLoop]: Abstraction has 5833 states and 17186 transitions. [2023-12-02 19:34:17,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-12-02 19:34:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5833 states and 17186 transitions. [2023-12-02 19:34:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 19:34:17,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:17,864 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:17,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:34:18,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:18,065 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:18,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:18,066 INFO L85 PathProgramCache]: Analyzing trace with hash -332046150, now seen corresponding path program 1 times [2023-12-02 19:34:18,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:18,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143375416] [2023-12-02 19:34:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:18,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 19:34:18,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:18,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143375416] [2023-12-02 19:34:18,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143375416] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:18,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:18,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:34:18,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399375049] [2023-12-02 19:34:18,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:18,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:34:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:18,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:34:18,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:18,260 INFO L87 Difference]: Start difference. First operand 5833 states and 17186 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-12-02 19:34:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:18,443 INFO L93 Difference]: Finished difference Result 4825 states and 14346 transitions. [2023-12-02 19:34:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:34:18,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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 30 [2023-12-02 19:34:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:18,461 INFO L225 Difference]: With dead ends: 4825 [2023-12-02 19:34:18,462 INFO L226 Difference]: Without dead ends: 4825 [2023-12-02 19:34:18,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:34:18,463 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 200 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:18,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 72 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2023-12-02 19:34:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4825. [2023-12-02 19:34:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4656 states have (on average 3.0811855670103094) internal successors, (14346), 4824 states have internal predecessors, (14346), 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) [2023-12-02 19:34:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 14346 transitions. [2023-12-02 19:34:18,619 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 14346 transitions. Word has length 30 [2023-12-02 19:34:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:18,620 INFO L495 AbstractCegarLoop]: Abstraction has 4825 states and 14346 transitions. [2023-12-02 19:34:18,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-12-02 19:34:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 14346 transitions. [2023-12-02 19:34:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 19:34:18,622 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:18,622 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:18,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 19:34:18,622 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:18,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash -332046149, now seen corresponding path program 1 times [2023-12-02 19:34:18,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:18,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391963365] [2023-12-02 19:34:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:18,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:34:19,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391963365] [2023-12-02 19:34:19,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391963365] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330007493] [2023-12-02 19:34:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:19,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:19,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:19,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:19,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:34:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:19,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 19:34:19,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:19,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 19:34:19,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:19,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 19:34:19,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:19,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 19:34:19,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:19,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:19,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:19,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 19:34:19,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:19,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:19,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 19:34:19,416 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 19:34:19,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 19:34:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:19,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:34:19,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-12-02 19:34:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:20,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330007493] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:34:20,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2053355316] [2023-12-02 19:34:20,107 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:34:20,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:34:20,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 21 [2023-12-02 19:34:20,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119984207] [2023-12-02 19:34:20,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:34:20,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 19:34:20,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:20,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 19:34:20,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-12-02 19:34:20,111 INFO L87 Difference]: Start difference. First operand 4825 states and 14346 transitions. Second operand has 23 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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) [2023-12-02 19:34:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:21,444 INFO L93 Difference]: Finished difference Result 9385 states and 27786 transitions. [2023-12-02 19:34:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 19:34:21,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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 30 [2023-12-02 19:34:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:21,470 INFO L225 Difference]: With dead ends: 9385 [2023-12-02 19:34:21,470 INFO L226 Difference]: Without dead ends: 9385 [2023-12-02 19:34:21,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 19:34:21,472 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 700 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:21,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 381 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 19:34:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9385 states. [2023-12-02 19:34:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9385 to 7465. [2023-12-02 19:34:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7465 states, 7335 states have (on average 3.234355828220859) internal successors, (23724), 7464 states have internal predecessors, (23724), 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) [2023-12-02 19:34:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7465 states to 7465 states and 23724 transitions. [2023-12-02 19:34:21,646 INFO L78 Accepts]: Start accepts. Automaton has 7465 states and 23724 transitions. Word has length 30 [2023-12-02 19:34:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:21,646 INFO L495 AbstractCegarLoop]: Abstraction has 7465 states and 23724 transitions. [2023-12-02 19:34:21,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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) [2023-12-02 19:34:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 7465 states and 23724 transitions. [2023-12-02 19:34:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 19:34:21,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:21,648 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:21,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:34:21,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 19:34:21,851 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:21,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1268723938, now seen corresponding path program 1 times [2023-12-02 19:34:21,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:21,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675326231] [2023-12-02 19:34:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:21,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 19:34:21,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:21,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675326231] [2023-12-02 19:34:21,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675326231] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:21,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:21,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:34:21,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982211543] [2023-12-02 19:34:21,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:21,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:34:21,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:21,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:34:21,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:34:21,929 INFO L87 Difference]: Start difference. First operand 7465 states and 23724 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-12-02 19:34:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:22,074 INFO L93 Difference]: Finished difference Result 6289 states and 19812 transitions. [2023-12-02 19:34:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:34:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 32 [2023-12-02 19:34:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:22,090 INFO L225 Difference]: With dead ends: 6289 [2023-12-02 19:34:22,090 INFO L226 Difference]: Without dead ends: 6289 [2023-12-02 19:34:22,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:34:22,091 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 88 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:22,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 66 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2023-12-02 19:34:22,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 6289. [2023-12-02 19:34:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6289 states, 6235 states have (on average 3.1775461106655976) internal successors, (19812), 6288 states have internal predecessors, (19812), 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) [2023-12-02 19:34:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6289 states to 6289 states and 19812 transitions. [2023-12-02 19:34:22,225 INFO L78 Accepts]: Start accepts. Automaton has 6289 states and 19812 transitions. Word has length 32 [2023-12-02 19:34:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:22,226 INFO L495 AbstractCegarLoop]: Abstraction has 6289 states and 19812 transitions. [2023-12-02 19:34:22,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-12-02 19:34:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 6289 states and 19812 transitions. [2023-12-02 19:34:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 19:34:22,227 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:22,227 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:22,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 19:34:22,228 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:22,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:22,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1268723937, now seen corresponding path program 1 times [2023-12-02 19:34:22,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:22,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482965998] [2023-12-02 19:34:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:22,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 19:34:22,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:22,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482965998] [2023-12-02 19:34:22,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482965998] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:22,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612309049] [2023-12-02 19:34:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:22,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:22,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:22,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:22,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:34:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:22,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 19:34:22,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:22,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:34:22,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-02 19:34:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:23,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612309049] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:34:23,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064099697] [2023-12-02 19:34:23,025 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:34:23,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:34:23,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2023-12-02 19:34:23,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826787447] [2023-12-02 19:34:23,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:34:23,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 19:34:23,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 19:34:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-12-02 19:34:23,028 INFO L87 Difference]: Start difference. First operand 6289 states and 19812 transitions. Second operand has 21 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 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) [2023-12-02 19:34:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:23,816 INFO L93 Difference]: Finished difference Result 9205 states and 27955 transitions. [2023-12-02 19:34:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 19:34:23,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 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 32 [2023-12-02 19:34:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:23,835 INFO L225 Difference]: With dead ends: 9205 [2023-12-02 19:34:23,835 INFO L226 Difference]: Without dead ends: 9205 [2023-12-02 19:34:23,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2023-12-02 19:34:23,836 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 518 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:23,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 415 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 19:34:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9205 states. [2023-12-02 19:34:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9205 to 8233. [2023-12-02 19:34:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8233 states, 8179 states have (on average 3.1243428291967232) internal successors, (25554), 8232 states have internal predecessors, (25554), 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) [2023-12-02 19:34:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8233 states to 8233 states and 25554 transitions. [2023-12-02 19:34:24,024 INFO L78 Accepts]: Start accepts. Automaton has 8233 states and 25554 transitions. Word has length 32 [2023-12-02 19:34:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:24,024 INFO L495 AbstractCegarLoop]: Abstraction has 8233 states and 25554 transitions. [2023-12-02 19:34:24,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 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) [2023-12-02 19:34:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 8233 states and 25554 transitions. [2023-12-02 19:34:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 19:34:24,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:24,026 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:24,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:34:24,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:24,226 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:24,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:24,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1842974631, now seen corresponding path program 1 times [2023-12-02 19:34:24,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:24,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311670312] [2023-12-02 19:34:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:24,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 19:34:24,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:24,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311670312] [2023-12-02 19:34:24,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311670312] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:24,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46299552] [2023-12-02 19:34:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:24,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:24,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:24,476 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:24,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:34:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:24,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 19:34:24,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:24,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:34:24,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-02 19:34:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:24,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46299552] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:34:24,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1994269998] [2023-12-02 19:34:24,988 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:34:24,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:34:24,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2023-12-02 19:34:24,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896739157] [2023-12-02 19:34:24,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:34:24,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 19:34:24,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:24,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 19:34:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-12-02 19:34:24,991 INFO L87 Difference]: Start difference. First operand 8233 states and 25554 transitions. Second operand has 21 states, 20 states have (on average 3.05) internal successors, (61), 21 states have internal predecessors, (61), 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) [2023-12-02 19:34:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:25,704 INFO L93 Difference]: Finished difference Result 15535 states and 48336 transitions. [2023-12-02 19:34:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 19:34:25,704 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 21 states have internal predecessors, (61), 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 33 [2023-12-02 19:34:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:25,742 INFO L225 Difference]: With dead ends: 15535 [2023-12-02 19:34:25,742 INFO L226 Difference]: Without dead ends: 15535 [2023-12-02 19:34:25,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2023-12-02 19:34:25,743 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 352 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:25,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 388 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:34:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15535 states. [2023-12-02 19:34:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15535 to 13249. [2023-12-02 19:34:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13249 states, 13213 states have (on average 3.2549761598425793) internal successors, (43008), 13248 states have internal predecessors, (43008), 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) [2023-12-02 19:34:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13249 states to 13249 states and 43008 transitions. [2023-12-02 19:34:26,049 INFO L78 Accepts]: Start accepts. Automaton has 13249 states and 43008 transitions. Word has length 33 [2023-12-02 19:34:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:26,050 INFO L495 AbstractCegarLoop]: Abstraction has 13249 states and 43008 transitions. [2023-12-02 19:34:26,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 21 states have internal predecessors, (61), 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) [2023-12-02 19:34:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 13249 states and 43008 transitions. [2023-12-02 19:34:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 19:34:26,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:26,051 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:26,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 19:34:26,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 19:34:26,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:26,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1572047459, now seen corresponding path program 1 times [2023-12-02 19:34:26,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:26,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995028795] [2023-12-02 19:34:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:26,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:34:26,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995028795] [2023-12-02 19:34:26,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995028795] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934864544] [2023-12-02 19:34:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:26,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:26,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:26,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:34:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:26,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 19:34:26,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:26,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 19:34:26,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 19:34:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:26,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 19:34:26,741 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 19:34:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:26,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 19:34:26,750 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 19:34:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:26,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 19:34:26,904 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 19:34:26,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 19:34:26,917 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 19:34:26,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 19:34:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:27,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:34:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:27,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934864544] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:27,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:34:27,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2023-12-02 19:34:27,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417103787] [2023-12-02 19:34:27,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:27,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 19:34:27,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 19:34:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-12-02 19:34:27,633 INFO L87 Difference]: Start difference. First operand 13249 states and 43008 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2023-12-02 19:34:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:28,342 INFO L93 Difference]: Finished difference Result 17812 states and 56391 transitions. [2023-12-02 19:34:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:34:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 35 [2023-12-02 19:34:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:28,382 INFO L225 Difference]: With dead ends: 17812 [2023-12-02 19:34:28,382 INFO L226 Difference]: Without dead ends: 17812 [2023-12-02 19:34:28,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-12-02 19:34:28,383 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 193 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:28,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 243 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 19:34:28,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17812 states. [2023-12-02 19:34:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17812 to 16897. [2023-12-02 19:34:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16897 states, 16861 states have (on average 3.1990985113575707) internal successors, (53940), 16896 states have internal predecessors, (53940), 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) [2023-12-02 19:34:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16897 states to 16897 states and 53940 transitions. [2023-12-02 19:34:28,683 INFO L78 Accepts]: Start accepts. Automaton has 16897 states and 53940 transitions. Word has length 35 [2023-12-02 19:34:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:28,683 INFO L495 AbstractCegarLoop]: Abstraction has 16897 states and 53940 transitions. [2023-12-02 19:34:28,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2023-12-02 19:34:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 16897 states and 53940 transitions. [2023-12-02 19:34:28,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 19:34:28,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:28,685 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:28,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:34:28,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:28,886 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:28,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:28,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2036945214, now seen corresponding path program 1 times [2023-12-02 19:34:28,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:28,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544030912] [2023-12-02 19:34:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:28,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:29,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:29,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544030912] [2023-12-02 19:34:29,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544030912] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:29,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:29,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:34:29,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454942530] [2023-12-02 19:34:29,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:29,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:34:29,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:34:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:34:29,669 INFO L87 Difference]: Start difference. First operand 16897 states and 53940 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:34:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:30,024 INFO L93 Difference]: Finished difference Result 17375 states and 55077 transitions. [2023-12-02 19:34:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:34:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-02 19:34:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:30,072 INFO L225 Difference]: With dead ends: 17375 [2023-12-02 19:34:30,072 INFO L226 Difference]: Without dead ends: 17344 [2023-12-02 19:34:30,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:30,073 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 51 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:30,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 169 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:34:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17344 states. [2023-12-02 19:34:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17344 to 16897. [2023-12-02 19:34:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16897 states, 16861 states have (on average 3.1987426605776643) internal successors, (53934), 16896 states have internal predecessors, (53934), 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) [2023-12-02 19:34:30,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16897 states to 16897 states and 53934 transitions. [2023-12-02 19:34:30,456 INFO L78 Accepts]: Start accepts. Automaton has 16897 states and 53934 transitions. Word has length 42 [2023-12-02 19:34:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:30,457 INFO L495 AbstractCegarLoop]: Abstraction has 16897 states and 53934 transitions. [2023-12-02 19:34:30,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:34:30,457 INFO L276 IsEmpty]: Start isEmpty. Operand 16897 states and 53934 transitions. [2023-12-02 19:34:30,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 19:34:30,459 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:30,459 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:30,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 19:34:30,460 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:30,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:30,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1954922660, now seen corresponding path program 2 times [2023-12-02 19:34:30,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:30,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359538925] [2023-12-02 19:34:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:30,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:31,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359538925] [2023-12-02 19:34:31,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359538925] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:31,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:31,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:34:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350646857] [2023-12-02 19:34:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:31,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:34:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:31,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:34:31,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:34:31,487 INFO L87 Difference]: Start difference. First operand 16897 states and 53934 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:34:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:31,921 INFO L93 Difference]: Finished difference Result 17582 states and 55543 transitions. [2023-12-02 19:34:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:34:31,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-02 19:34:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:31,964 INFO L225 Difference]: With dead ends: 17582 [2023-12-02 19:34:31,964 INFO L226 Difference]: Without dead ends: 17563 [2023-12-02 19:34:31,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:31,965 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 55 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:31,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 169 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:34:31,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17563 states. [2023-12-02 19:34:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17563 to 16921. [2023-12-02 19:34:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16921 states, 16885 states have (on average 3.1969795676636066) internal successors, (53981), 16920 states have internal predecessors, (53981), 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) [2023-12-02 19:34:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16921 states to 16921 states and 53981 transitions. [2023-12-02 19:34:32,259 INFO L78 Accepts]: Start accepts. Automaton has 16921 states and 53981 transitions. Word has length 42 [2023-12-02 19:34:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:32,260 INFO L495 AbstractCegarLoop]: Abstraction has 16921 states and 53981 transitions. [2023-12-02 19:34:32,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:34:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 16921 states and 53981 transitions. [2023-12-02 19:34:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 19:34:32,263 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:32,263 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:32,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 19:34:32,263 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:32,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:32,263 INFO L85 PathProgramCache]: Analyzing trace with hash -384350158, now seen corresponding path program 1 times [2023-12-02 19:34:32,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:32,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844494249] [2023-12-02 19:34:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:32,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:32,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:32,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844494249] [2023-12-02 19:34:32,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844494249] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:32,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:32,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:34:32,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434344981] [2023-12-02 19:34:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:32,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:34:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:32,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:34:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:34:32,356 INFO L87 Difference]: Start difference. First operand 16921 states and 53981 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2023-12-02 19:34:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:32,515 INFO L93 Difference]: Finished difference Result 16921 states and 53546 transitions. [2023-12-02 19:34:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:34:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 45 [2023-12-02 19:34:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:32,556 INFO L225 Difference]: With dead ends: 16921 [2023-12-02 19:34:32,556 INFO L226 Difference]: Without dead ends: 16921 [2023-12-02 19:34:32,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:34:32,557 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 78 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:32,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 51 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16921 states. [2023-12-02 19:34:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16921 to 16897. [2023-12-02 19:34:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16897 states, 16861 states have (on average 3.1729434790344584) internal successors, (53499), 16896 states have internal predecessors, (53499), 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) [2023-12-02 19:34:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16897 states to 16897 states and 53499 transitions. [2023-12-02 19:34:32,850 INFO L78 Accepts]: Start accepts. Automaton has 16897 states and 53499 transitions. Word has length 45 [2023-12-02 19:34:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:32,850 INFO L495 AbstractCegarLoop]: Abstraction has 16897 states and 53499 transitions. [2023-12-02 19:34:32,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2023-12-02 19:34:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 16897 states and 53499 transitions. [2023-12-02 19:34:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 19:34:32,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:32,854 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:32,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 19:34:32,854 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:32,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:32,855 INFO L85 PathProgramCache]: Analyzing trace with hash 10850188, now seen corresponding path program 2 times [2023-12-02 19:34:32,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:32,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740493070] [2023-12-02 19:34:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:32,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:32,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:32,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740493070] [2023-12-02 19:34:32,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740493070] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:32,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:32,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:34:32,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074412017] [2023-12-02 19:34:32,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:32,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:34:32,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:32,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:34:32,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:34:32,989 INFO L87 Difference]: Start difference. First operand 16897 states and 53499 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2023-12-02 19:34:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:33,148 INFO L93 Difference]: Finished difference Result 16921 states and 53537 transitions. [2023-12-02 19:34:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:34:33,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 45 [2023-12-02 19:34:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:33,187 INFO L225 Difference]: With dead ends: 16921 [2023-12-02 19:34:33,187 INFO L226 Difference]: Without dead ends: 16897 [2023-12-02 19:34:33,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:34:33,188 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:33,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 86 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16897 states. [2023-12-02 19:34:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16897 to 16897. [2023-12-02 19:34:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16897 states, 16861 states have (on average 3.1724097028645986) internal successors, (53490), 16896 states have internal predecessors, (53490), 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) [2023-12-02 19:34:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16897 states to 16897 states and 53490 transitions. [2023-12-02 19:34:33,482 INFO L78 Accepts]: Start accepts. Automaton has 16897 states and 53490 transitions. Word has length 45 [2023-12-02 19:34:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:33,482 INFO L495 AbstractCegarLoop]: Abstraction has 16897 states and 53490 transitions. [2023-12-02 19:34:33,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2023-12-02 19:34:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 16897 states and 53490 transitions. [2023-12-02 19:34:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 19:34:33,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:33,488 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:33,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 19:34:33,488 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:33,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1288819427, now seen corresponding path program 1 times [2023-12-02 19:34:33,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:33,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50414065] [2023-12-02 19:34:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:33,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:33,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:33,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50414065] [2023-12-02 19:34:33,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50414065] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:33,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:33,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:34:33,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024614877] [2023-12-02 19:34:33,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:33,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:34:33,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:33,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:34:33,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:34:33,630 INFO L87 Difference]: Start difference. First operand 16897 states and 53490 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-12-02 19:34:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:33,819 INFO L93 Difference]: Finished difference Result 17125 states and 53928 transitions. [2023-12-02 19:34:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:34:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 48 [2023-12-02 19:34:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:33,870 INFO L225 Difference]: With dead ends: 17125 [2023-12-02 19:34:33,870 INFO L226 Difference]: Without dead ends: 17113 [2023-12-02 19:34:33,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:34:33,870 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 52 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:33,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 100 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17113 states. [2023-12-02 19:34:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17113 to 17113. [2023-12-02 19:34:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17113 states, 17072 states have (on average 3.156747891283974) internal successors, (53892), 17112 states have internal predecessors, (53892), 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) [2023-12-02 19:34:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17113 states to 17113 states and 53892 transitions. [2023-12-02 19:34:34,167 INFO L78 Accepts]: Start accepts. Automaton has 17113 states and 53892 transitions. Word has length 48 [2023-12-02 19:34:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:34,167 INFO L495 AbstractCegarLoop]: Abstraction has 17113 states and 53892 transitions. [2023-12-02 19:34:34,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-12-02 19:34:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 17113 states and 53892 transitions. [2023-12-02 19:34:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 19:34:34,171 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:34,171 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:34,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 19:34:34,172 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:34,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:34,172 INFO L85 PathProgramCache]: Analyzing trace with hash 212961856, now seen corresponding path program 1 times [2023-12-02 19:34:34,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:34,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953947673] [2023-12-02 19:34:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:34,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:34:34,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:34,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953947673] [2023-12-02 19:34:34,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953947673] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:34,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129944972] [2023-12-02 19:34:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:34,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:34,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:34,472 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:34,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:34:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:34,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 19:34:34,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:34,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:34:34,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129944972] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:34,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:34:34,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-12-02 19:34:34,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049338406] [2023-12-02 19:34:34,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:34,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:34:34,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:34,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:34:34,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:34:34,687 INFO L87 Difference]: Start difference. First operand 17113 states and 53892 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2023-12-02 19:34:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:35,087 INFO L93 Difference]: Finished difference Result 18709 states and 58782 transitions. [2023-12-02 19:34:35,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:34:35,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 51 [2023-12-02 19:34:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:35,139 INFO L225 Difference]: With dead ends: 18709 [2023-12-02 19:34:35,139 INFO L226 Difference]: Without dead ends: 18709 [2023-12-02 19:34:35,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 19:34:35,140 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 184 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:35,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 300 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:34:35,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18709 states. [2023-12-02 19:34:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18709 to 17569. [2023-12-02 19:34:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17569 states, 17528 states have (on average 3.1506161570059334) internal successors, (55224), 17568 states have internal predecessors, (55224), 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) [2023-12-02 19:34:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17569 states to 17569 states and 55224 transitions. [2023-12-02 19:34:35,451 INFO L78 Accepts]: Start accepts. Automaton has 17569 states and 55224 transitions. Word has length 51 [2023-12-02 19:34:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:35,451 INFO L495 AbstractCegarLoop]: Abstraction has 17569 states and 55224 transitions. [2023-12-02 19:34:35,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2023-12-02 19:34:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 17569 states and 55224 transitions. [2023-12-02 19:34:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 19:34:35,455 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:35,455 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:35,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 19:34:35,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:35,655 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:35,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash -531733300, now seen corresponding path program 1 times [2023-12-02 19:34:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:35,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408060828] [2023-12-02 19:34:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:35,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:34:35,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:35,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408060828] [2023-12-02 19:34:35,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408060828] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:35,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806022614] [2023-12-02 19:34:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:35,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:35,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:35,978 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:35,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 19:34:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:36,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 19:34:36,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:36,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:34:36,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806022614] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:36,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:34:36,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-12-02 19:34:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024029931] [2023-12-02 19:34:36,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:36,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:34:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:36,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:34:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:34:36,235 INFO L87 Difference]: Start difference. First operand 17569 states and 55224 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2023-12-02 19:34:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:36,731 INFO L93 Difference]: Finished difference Result 21901 states and 68562 transitions. [2023-12-02 19:34:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:34:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 52 [2023-12-02 19:34:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:36,782 INFO L225 Difference]: With dead ends: 21901 [2023-12-02 19:34:36,782 INFO L226 Difference]: Without dead ends: 21901 [2023-12-02 19:34:36,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-12-02 19:34:36,783 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 239 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:36,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 260 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:34:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21901 states. [2023-12-02 19:34:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21901 to 17797. [2023-12-02 19:34:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17797 states, 17762 states have (on average 3.133768719738768) internal successors, (55662), 17796 states have internal predecessors, (55662), 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) [2023-12-02 19:34:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17797 states to 17797 states and 55662 transitions. [2023-12-02 19:34:37,118 INFO L78 Accepts]: Start accepts. Automaton has 17797 states and 55662 transitions. Word has length 52 [2023-12-02 19:34:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:37,118 INFO L495 AbstractCegarLoop]: Abstraction has 17797 states and 55662 transitions. [2023-12-02 19:34:37,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2023-12-02 19:34:37,119 INFO L276 IsEmpty]: Start isEmpty. Operand 17797 states and 55662 transitions. [2023-12-02 19:34:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 19:34:37,122 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:37,122 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:37,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 19:34:37,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:37,323 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:37,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:37,323 INFO L85 PathProgramCache]: Analyzing trace with hash -920483314, now seen corresponding path program 1 times [2023-12-02 19:34:37,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:37,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136819938] [2023-12-02 19:34:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:37,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:37,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:37,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136819938] [2023-12-02 19:34:37,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136819938] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:37,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:37,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:34:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287944051] [2023-12-02 19:34:37,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:37,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:34:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:34:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:37,406 INFO L87 Difference]: Start difference. First operand 17797 states and 55662 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2023-12-02 19:34:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:37,796 INFO L93 Difference]: Finished difference Result 20533 states and 63654 transitions. [2023-12-02 19:34:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:34:37,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 52 [2023-12-02 19:34:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:37,842 INFO L225 Difference]: With dead ends: 20533 [2023-12-02 19:34:37,842 INFO L226 Difference]: Without dead ends: 20533 [2023-12-02 19:34:37,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:34:37,843 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 191 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:37,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 267 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:34:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20533 states. [2023-12-02 19:34:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20533 to 19165. [2023-12-02 19:34:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19165 states, 19130 states have (on average 3.1185572399372714) internal successors, (59658), 19164 states have internal predecessors, (59658), 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) [2023-12-02 19:34:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19165 states to 19165 states and 59658 transitions. [2023-12-02 19:34:38,180 INFO L78 Accepts]: Start accepts. Automaton has 19165 states and 59658 transitions. Word has length 52 [2023-12-02 19:34:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:38,180 INFO L495 AbstractCegarLoop]: Abstraction has 19165 states and 59658 transitions. [2023-12-02 19:34:38,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2023-12-02 19:34:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 19165 states and 59658 transitions. [2023-12-02 19:34:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 19:34:38,184 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:38,184 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:38,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 19:34:38,184 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:38,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:38,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2014607963, now seen corresponding path program 1 times [2023-12-02 19:34:38,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:38,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075187364] [2023-12-02 19:34:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:38,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:38,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075187364] [2023-12-02 19:34:38,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075187364] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:38,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:38,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:34:38,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544615094] [2023-12-02 19:34:38,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:38,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:34:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:38,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:34:38,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:34:38,390 INFO L87 Difference]: Start difference. First operand 19165 states and 59658 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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) [2023-12-02 19:34:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:38,867 INFO L93 Difference]: Finished difference Result 21676 states and 66531 transitions. [2023-12-02 19:34:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:34:38,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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 53 [2023-12-02 19:34:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:38,912 INFO L225 Difference]: With dead ends: 21676 [2023-12-02 19:34:38,912 INFO L226 Difference]: Without dead ends: 21676 [2023-12-02 19:34:38,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:34:38,912 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 180 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:38,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 418 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:34:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21676 states. [2023-12-02 19:34:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21676 to 19393. [2023-12-02 19:34:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19393 states, 19364 states have (on average 3.1034910142532532) internal successors, (60096), 19392 states have internal predecessors, (60096), 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) [2023-12-02 19:34:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19393 states to 19393 states and 60096 transitions. [2023-12-02 19:34:39,258 INFO L78 Accepts]: Start accepts. Automaton has 19393 states and 60096 transitions. Word has length 53 [2023-12-02 19:34:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:39,258 INFO L495 AbstractCegarLoop]: Abstraction has 19393 states and 60096 transitions. [2023-12-02 19:34:39,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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) [2023-12-02 19:34:39,259 INFO L276 IsEmpty]: Start isEmpty. Operand 19393 states and 60096 transitions. [2023-12-02 19:34:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 19:34:39,263 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:39,263 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:39,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-02 19:34:39,263 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:39,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:39,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1718247603, now seen corresponding path program 1 times [2023-12-02 19:34:39,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:39,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087754366] [2023-12-02 19:34:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:39,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:39,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:39,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087754366] [2023-12-02 19:34:39,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087754366] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:39,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:39,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:34:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806282104] [2023-12-02 19:34:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:39,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:34:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:39,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:34:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:39,380 INFO L87 Difference]: Start difference. First operand 19393 states and 60096 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-12-02 19:34:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:39,771 INFO L93 Difference]: Finished difference Result 19393 states and 59640 transitions. [2023-12-02 19:34:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:34:39,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 54 [2023-12-02 19:34:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:39,840 INFO L225 Difference]: With dead ends: 19393 [2023-12-02 19:34:39,840 INFO L226 Difference]: Without dead ends: 19393 [2023-12-02 19:34:39,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:34:39,841 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 149 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:39,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 217 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:34:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19393 states. [2023-12-02 19:34:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19393 to 19393. [2023-12-02 19:34:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19393 states, 19364 states have (on average 3.079942160710597) internal successors, (59640), 19392 states have internal predecessors, (59640), 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) [2023-12-02 19:34:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19393 states to 19393 states and 59640 transitions. [2023-12-02 19:34:40,347 INFO L78 Accepts]: Start accepts. Automaton has 19393 states and 59640 transitions. Word has length 54 [2023-12-02 19:34:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:40,347 INFO L495 AbstractCegarLoop]: Abstraction has 19393 states and 59640 transitions. [2023-12-02 19:34:40,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-12-02 19:34:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 19393 states and 59640 transitions. [2023-12-02 19:34:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 19:34:40,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:40,353 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-02 19:34:40,354 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:40,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1280342375, now seen corresponding path program 1 times [2023-12-02 19:34:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:40,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172004825] [2023-12-02 19:34:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:34:40,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:40,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172004825] [2023-12-02 19:34:40,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172004825] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:40,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738156527] [2023-12-02 19:34:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:40,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:40,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:40,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:40,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 19:34:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:40,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 19:34:40,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:34:41,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:34:41,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738156527] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:41,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:34:41,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2023-12-02 19:34:41,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43232626] [2023-12-02 19:34:41,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:41,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:34:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:41,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:34:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-12-02 19:34:41,032 INFO L87 Difference]: Start difference. First operand 19393 states and 59640 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2023-12-02 19:34:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:41,635 INFO L93 Difference]: Finished difference Result 23272 states and 70737 transitions. [2023-12-02 19:34:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 19:34:41,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 55 [2023-12-02 19:34:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:41,686 INFO L225 Difference]: With dead ends: 23272 [2023-12-02 19:34:41,687 INFO L226 Difference]: Without dead ends: 23272 [2023-12-02 19:34:41,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:34:41,688 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 280 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:41,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 589 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:34:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23272 states. [2023-12-02 19:34:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23272 to 19165. [2023-12-02 19:34:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19165 states, 19136 states have (on average 3.0580058528428093) internal successors, (58518), 19164 states have internal predecessors, (58518), 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) [2023-12-02 19:34:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19165 states to 19165 states and 58518 transitions. [2023-12-02 19:34:42,037 INFO L78 Accepts]: Start accepts. Automaton has 19165 states and 58518 transitions. Word has length 55 [2023-12-02 19:34:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:42,037 INFO L495 AbstractCegarLoop]: Abstraction has 19165 states and 58518 transitions. [2023-12-02 19:34:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2023-12-02 19:34:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 19165 states and 58518 transitions. [2023-12-02 19:34:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 19:34:42,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:42,043 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:42,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 19:34:42,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:42,243 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:42,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash 646214212, now seen corresponding path program 1 times [2023-12-02 19:34:42,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:42,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141793430] [2023-12-02 19:34:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:42,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:34:42,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:42,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141793430] [2023-12-02 19:34:42,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141793430] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:42,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929942146] [2023-12-02 19:34:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:42,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:42,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:42,563 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:42,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 19:34:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:42,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 19:34:42,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:42,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-12-02 19:34:42,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:42,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:42,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:42,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 19:34:42,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:42,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:42,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:42,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 19:34:42,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:42,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:42,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:42,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 19:34:42,945 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 19:34:42,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 19:34:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:43,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:34:43,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-12-02 19:34:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:43,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929942146] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:34:43,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684768421] [2023-12-02 19:34:43,768 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:34:43,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:34:43,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-12-02 19:34:43,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707571445] [2023-12-02 19:34:43,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:34:43,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 19:34:43,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:43,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 19:34:43,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-12-02 19:34:43,770 INFO L87 Difference]: Start difference. First operand 19165 states and 58518 transitions. Second operand has 26 states, 25 states have (on average 5.44) internal successors, (136), 25 states have internal predecessors, (136), 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) [2023-12-02 19:34:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:45,544 INFO L93 Difference]: Finished difference Result 49042 states and 149877 transitions. [2023-12-02 19:34:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 19:34:45,545 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.44) internal successors, (136), 25 states have internal predecessors, (136), 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 55 [2023-12-02 19:34:45,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:45,669 INFO L225 Difference]: With dead ends: 49042 [2023-12-02 19:34:45,669 INFO L226 Difference]: Without dead ends: 49042 [2023-12-02 19:34:45,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=1138, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 19:34:45,670 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 996 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:45,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 856 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 19:34:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49042 states. [2023-12-02 19:34:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49042 to 31705. [2023-12-02 19:34:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31705 states, 31676 states have (on average 3.0973607778759944) internal successors, (98112), 31704 states have internal predecessors, (98112), 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) [2023-12-02 19:34:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31705 states to 31705 states and 98112 transitions. [2023-12-02 19:34:46,381 INFO L78 Accepts]: Start accepts. Automaton has 31705 states and 98112 transitions. Word has length 55 [2023-12-02 19:34:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:46,381 INFO L495 AbstractCegarLoop]: Abstraction has 31705 states and 98112 transitions. [2023-12-02 19:34:46,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.44) internal successors, (136), 25 states have internal predecessors, (136), 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) [2023-12-02 19:34:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 31705 states and 98112 transitions. [2023-12-02 19:34:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 19:34:46,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:46,390 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:46,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 19:34:46,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 19:34:46,591 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:46,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:46,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1446301569, now seen corresponding path program 1 times [2023-12-02 19:34:46,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:46,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743161746] [2023-12-02 19:34:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:46,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-02 19:34:46,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:46,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743161746] [2023-12-02 19:34:46,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743161746] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:46,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:46,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:34:46,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971892321] [2023-12-02 19:34:46,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:46,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:34:46,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:46,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:34:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:34:46,770 INFO L87 Difference]: Start difference. First operand 31705 states and 98112 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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) [2023-12-02 19:34:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:47,239 INFO L93 Difference]: Finished difference Result 36697 states and 111186 transitions. [2023-12-02 19:34:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:34:47,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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 62 [2023-12-02 19:34:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:47,319 INFO L225 Difference]: With dead ends: 36697 [2023-12-02 19:34:47,320 INFO L226 Difference]: Without dead ends: 36661 [2023-12-02 19:34:47,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:34:47,320 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 184 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:47,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 279 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:34:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36661 states. [2023-12-02 19:34:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36661 to 32107. [2023-12-02 19:34:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32107 states, 32083 states have (on average 3.0804787582208646) internal successors, (98831), 32106 states have internal predecessors, (98831), 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) [2023-12-02 19:34:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32107 states to 32107 states and 98831 transitions. [2023-12-02 19:34:47,903 INFO L78 Accepts]: Start accepts. Automaton has 32107 states and 98831 transitions. Word has length 62 [2023-12-02 19:34:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:47,903 INFO L495 AbstractCegarLoop]: Abstraction has 32107 states and 98831 transitions. [2023-12-02 19:34:47,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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) [2023-12-02 19:34:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 32107 states and 98831 transitions. [2023-12-02 19:34:47,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 19:34:47,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:47,913 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:47,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 19:34:47,913 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:47,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:47,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1872764027, now seen corresponding path program 1 times [2023-12-02 19:34:47,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:47,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586497647] [2023-12-02 19:34:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:47,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 19:34:48,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:48,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586497647] [2023-12-02 19:34:48,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586497647] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:48,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:48,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:34:48,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485341096] [2023-12-02 19:34:48,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:48,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:34:48,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:48,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:34:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:48,008 INFO L87 Difference]: Start difference. First operand 32107 states and 98831 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2023-12-02 19:34:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:48,389 INFO L93 Difference]: Finished difference Result 33763 states and 102014 transitions. [2023-12-02 19:34:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:34:48,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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 64 [2023-12-02 19:34:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:48,464 INFO L225 Difference]: With dead ends: 33763 [2023-12-02 19:34:48,464 INFO L226 Difference]: Without dead ends: 33763 [2023-12-02 19:34:48,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:34:48,465 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 152 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:48,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 199 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:34:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33763 states. [2023-12-02 19:34:49,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33763 to 32107. [2023-12-02 19:34:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32107 states, 32083 states have (on average 3.0544836829473554) internal successors, (97997), 32106 states have internal predecessors, (97997), 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) [2023-12-02 19:34:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32107 states to 32107 states and 97997 transitions. [2023-12-02 19:34:49,322 INFO L78 Accepts]: Start accepts. Automaton has 32107 states and 97997 transitions. Word has length 64 [2023-12-02 19:34:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:49,322 INFO L495 AbstractCegarLoop]: Abstraction has 32107 states and 97997 transitions. [2023-12-02 19:34:49,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2023-12-02 19:34:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 32107 states and 97997 transitions. [2023-12-02 19:34:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 19:34:49,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:49,336 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:49,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 19:34:49,336 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:49,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1353151085, now seen corresponding path program 1 times [2023-12-02 19:34:49,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:49,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808024832] [2023-12-02 19:34:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:49,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 19:34:49,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:49,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808024832] [2023-12-02 19:34:49,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808024832] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:49,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:49,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:34:49,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968783960] [2023-12-02 19:34:49,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:49,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:34:49,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:49,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:34:49,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:34:49,574 INFO L87 Difference]: Start difference. First operand 32107 states and 97997 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-12-02 19:34:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:49,861 INFO L93 Difference]: Finished difference Result 32521 states and 98760 transitions. [2023-12-02 19:34:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:34:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 66 [2023-12-02 19:34:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:49,950 INFO L225 Difference]: With dead ends: 32521 [2023-12-02 19:34:49,950 INFO L226 Difference]: Without dead ends: 32482 [2023-12-02 19:34:49,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:34:49,951 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 51 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:49,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 92 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32482 states. [2023-12-02 19:34:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32482 to 32476. [2023-12-02 19:34:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32476 states, 32449 states have (on average 3.038737711485716) internal successors, (98604), 32475 states have internal predecessors, (98604), 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) [2023-12-02 19:34:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32476 states to 32476 states and 98604 transitions. [2023-12-02 19:34:50,626 INFO L78 Accepts]: Start accepts. Automaton has 32476 states and 98604 transitions. Word has length 66 [2023-12-02 19:34:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:50,626 INFO L495 AbstractCegarLoop]: Abstraction has 32476 states and 98604 transitions. [2023-12-02 19:34:50,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-12-02 19:34:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 32476 states and 98604 transitions. [2023-12-02 19:34:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 19:34:50,637 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:50,637 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:50,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 19:34:50,637 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:50,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:50,637 INFO L85 PathProgramCache]: Analyzing trace with hash -610528379, now seen corresponding path program 1 times [2023-12-02 19:34:50,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:50,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775064127] [2023-12-02 19:34:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:50,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 19:34:50,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:50,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775064127] [2023-12-02 19:34:50,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775064127] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:50,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:50,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:34:50,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509534607] [2023-12-02 19:34:50,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:50,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:34:50,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:50,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:34:50,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:34:50,823 INFO L87 Difference]: Start difference. First operand 32476 states and 98604 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2023-12-02 19:34:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:51,448 INFO L93 Difference]: Finished difference Result 41206 states and 122717 transitions. [2023-12-02 19:34:51,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:34:51,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 66 [2023-12-02 19:34:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:51,537 INFO L225 Difference]: With dead ends: 41206 [2023-12-02 19:34:51,537 INFO L226 Difference]: Without dead ends: 41170 [2023-12-02 19:34:51,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:34:51,537 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 179 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:51,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 378 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:34:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41170 states. [2023-12-02 19:34:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41170 to 34132. [2023-12-02 19:34:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34132 states, 34105 states have (on average 3.028969359331476) internal successors, (103303), 34131 states have internal predecessors, (103303), 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) [2023-12-02 19:34:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34132 states to 34132 states and 103303 transitions. [2023-12-02 19:34:52,369 INFO L78 Accepts]: Start accepts. Automaton has 34132 states and 103303 transitions. Word has length 66 [2023-12-02 19:34:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:52,369 INFO L495 AbstractCegarLoop]: Abstraction has 34132 states and 103303 transitions. [2023-12-02 19:34:52,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2023-12-02 19:34:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 34132 states and 103303 transitions. [2023-12-02 19:34:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 19:34:52,385 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:52,385 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:52,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-02 19:34:52,386 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:52,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1292974907, now seen corresponding path program 1 times [2023-12-02 19:34:52,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:52,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895771620] [2023-12-02 19:34:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:52,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 19:34:52,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:52,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895771620] [2023-12-02 19:34:52,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895771620] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:52,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:52,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:34:52,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694237400] [2023-12-02 19:34:52,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:52,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:34:52,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:52,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:34:52,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:52,496 INFO L87 Difference]: Start difference. First operand 34132 states and 103303 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2023-12-02 19:34:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:52,867 INFO L93 Difference]: Finished difference Result 34132 states and 102052 transitions. [2023-12-02 19:34:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:34:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 68 [2023-12-02 19:34:52,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:52,965 INFO L225 Difference]: With dead ends: 34132 [2023-12-02 19:34:52,965 INFO L226 Difference]: Without dead ends: 34132 [2023-12-02 19:34:52,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:34:52,966 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 202 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:52,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 172 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:34:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34132 states. [2023-12-02 19:34:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34132 to 34132. [2023-12-02 19:34:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34132 states, 34105 states have (on average 2.9922885207447587) internal successors, (102052), 34131 states have internal predecessors, (102052), 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) [2023-12-02 19:34:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34132 states to 34132 states and 102052 transitions. [2023-12-02 19:34:53,825 INFO L78 Accepts]: Start accepts. Automaton has 34132 states and 102052 transitions. Word has length 68 [2023-12-02 19:34:53,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:53,825 INFO L495 AbstractCegarLoop]: Abstraction has 34132 states and 102052 transitions. [2023-12-02 19:34:53,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2023-12-02 19:34:53,825 INFO L276 IsEmpty]: Start isEmpty. Operand 34132 states and 102052 transitions. [2023-12-02 19:34:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 19:34:53,837 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:53,837 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:53,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-12-02 19:34:53,838 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:34:53,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2000493943, now seen corresponding path program 1 times [2023-12-02 19:34:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:53,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677545297] [2023-12-02 19:34:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:53,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:34:54,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677545297] [2023-12-02 19:34:54,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677545297] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:54,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291385701] [2023-12-02 19:34:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:54,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:54,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:54,381 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:54,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 19:34:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:54,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:34:54,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:54,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 19:34:54,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:54,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:54,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:54,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 19:34:54,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:54,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:54,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:54,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 19:34:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:54,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 19:34:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 19:34:54,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 19:34:54,711 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 19:34:54,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 19:34:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:55,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:34:55,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-12-02 19:34:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:34:55,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291385701] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:34:55,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [751978222] [2023-12-02 19:34:55,620 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:34:55,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:34:55,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-12-02 19:34:55,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097119240] [2023-12-02 19:34:55,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:34:55,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 19:34:55,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:55,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 19:34:55,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2023-12-02 19:34:55,623 INFO L87 Difference]: Start difference. First operand 34132 states and 102052 transitions. Second operand has 31 states, 30 states have (on average 6.033333333333333) internal successors, (181), 30 states have internal predecessors, (181), 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) [2023-12-02 19:34:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:58,079 INFO L93 Difference]: Finished difference Result 95692 states and 282553 transitions. [2023-12-02 19:34:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 19:34:58,080 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 6.033333333333333) internal successors, (181), 30 states have internal predecessors, (181), 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 70 [2023-12-02 19:34:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:58,379 INFO L225 Difference]: With dead ends: 95692 [2023-12-02 19:34:58,379 INFO L226 Difference]: Without dead ends: 95692 [2023-12-02 19:34:58,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 19:34:58,381 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1226 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:58,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 1113 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 19:34:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95692 states. [2023-12-02 19:34:59,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95692 to 71662. [2023-12-02 19:34:59,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71662 states, 71635 states have (on average 3.06421442032526) internal successors, (219505), 71661 states have internal predecessors, (219505), 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) [2023-12-02 19:35:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71662 states to 71662 states and 219505 transitions. [2023-12-02 19:35:00,137 INFO L78 Accepts]: Start accepts. Automaton has 71662 states and 219505 transitions. Word has length 70 [2023-12-02 19:35:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:35:00,137 INFO L495 AbstractCegarLoop]: Abstraction has 71662 states and 219505 transitions. [2023-12-02 19:35:00,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 6.033333333333333) internal successors, (181), 30 states have internal predecessors, (181), 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) [2023-12-02 19:35:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 71662 states and 219505 transitions. [2023-12-02 19:35:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 19:35:00,150 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:35:00,150 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:35:00,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 19:35:00,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:35:00,351 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:35:00,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:35:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1670714733, now seen corresponding path program 1 times [2023-12-02 19:35:00,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:35:00,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341479352] [2023-12-02 19:35:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:00,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:35:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 19:35:00,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:35:00,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341479352] [2023-12-02 19:35:00,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341479352] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:35:00,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277277203] [2023-12-02 19:35:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:00,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:35:00,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:35:00,902 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:35:00,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 19:35:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:01,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 19:35:01,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:35:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:35:01,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:35:01,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-02 19:35:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:35:01,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277277203] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:35:01,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282612506] [2023-12-02 19:35:01,813 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:35:01,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:35:01,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2023-12-02 19:35:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150725966] [2023-12-02 19:35:01,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:35:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 19:35:01,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:35:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 19:35:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2023-12-02 19:35:01,816 INFO L87 Difference]: Start difference. First operand 71662 states and 219505 transitions. Second operand has 28 states, 27 states have (on average 6.62962962962963) internal successors, (179), 28 states have internal predecessors, (179), 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) [2023-12-02 19:35:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:35:03,927 INFO L93 Difference]: Finished difference Result 102343 states and 303119 transitions. [2023-12-02 19:35:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 19:35:03,927 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.62962962962963) internal successors, (179), 28 states have internal predecessors, (179), 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 72 [2023-12-02 19:35:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:35:04,389 INFO L225 Difference]: With dead ends: 102343 [2023-12-02 19:35:04,389 INFO L226 Difference]: Without dead ends: 102343 [2023-12-02 19:35:04,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 19:35:04,390 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 959 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:35:04,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 1193 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 19:35:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102343 states. [2023-12-02 19:35:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102343 to 61654. [2023-12-02 19:35:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61654 states, 61627 states have (on average 3.0261086861278335) internal successors, (186490), 61653 states have internal predecessors, (186490), 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) [2023-12-02 19:35:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61654 states to 61654 states and 186490 transitions. [2023-12-02 19:35:05,948 INFO L78 Accepts]: Start accepts. Automaton has 61654 states and 186490 transitions. Word has length 72 [2023-12-02 19:35:05,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:35:05,948 INFO L495 AbstractCegarLoop]: Abstraction has 61654 states and 186490 transitions. [2023-12-02 19:35:05,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.62962962962963) internal successors, (179), 28 states have internal predecessors, (179), 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) [2023-12-02 19:35:05,948 INFO L276 IsEmpty]: Start isEmpty. Operand 61654 states and 186490 transitions. [2023-12-02 19:35:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 19:35:05,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:35:05,963 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:35:05,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 19:35:06,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 19:35:06,164 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:35:06,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:35:06,165 INFO L85 PathProgramCache]: Analyzing trace with hash 747252647, now seen corresponding path program 1 times [2023-12-02 19:35:06,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:35:06,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252801434] [2023-12-02 19:35:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:06,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:35:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 19:35:06,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:35:06,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252801434] [2023-12-02 19:35:06,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252801434] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:35:06,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810054432] [2023-12-02 19:35:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:06,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:35:06,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:35:06,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:35:06,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 19:35:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:06,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 19:35:06,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:35:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:35:07,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:35:07,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-02 19:35:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:35:07,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810054432] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:35:07,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1277034804] [2023-12-02 19:35:07,610 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:35:07,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:35:07,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2023-12-02 19:35:07,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557223318] [2023-12-02 19:35:07,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:35:07,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 19:35:07,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:35:07,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 19:35:07,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2023-12-02 19:35:07,612 INFO L87 Difference]: Start difference. First operand 61654 states and 186490 transitions. Second operand has 28 states, 27 states have (on average 6.7407407407407405) internal successors, (182), 28 states have internal predecessors, (182), 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) [2023-12-02 19:35:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:35:09,585 INFO L93 Difference]: Finished difference Result 93478 states and 278117 transitions. [2023-12-02 19:35:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 19:35:09,586 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.7407407407407405) internal successors, (182), 28 states have internal predecessors, (182), 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 73 [2023-12-02 19:35:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:35:09,820 INFO L225 Difference]: With dead ends: 93478 [2023-12-02 19:35:09,820 INFO L226 Difference]: Without dead ends: 93478 [2023-12-02 19:35:09,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 19:35:09,821 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 829 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 2695 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:35:09,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 1361 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2695 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 19:35:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93478 states. [2023-12-02 19:35:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93478 to 70534. [2023-12-02 19:35:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70534 states, 70507 states have (on average 3.016565731062164) internal successors, (212689), 70533 states have internal predecessors, (212689), 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) [2023-12-02 19:35:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70534 states to 70534 states and 212689 transitions. [2023-12-02 19:35:11,512 INFO L78 Accepts]: Start accepts. Automaton has 70534 states and 212689 transitions. Word has length 73 [2023-12-02 19:35:11,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:35:11,512 INFO L495 AbstractCegarLoop]: Abstraction has 70534 states and 212689 transitions. [2023-12-02 19:35:11,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.7407407407407405) internal successors, (182), 28 states have internal predecessors, (182), 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) [2023-12-02 19:35:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 70534 states and 212689 transitions. [2023-12-02 19:35:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 19:35:11,531 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:35:11,532 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:35:11,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 19:35:11,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 19:35:11,732 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:35:11,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:35:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1302626864, now seen corresponding path program 1 times [2023-12-02 19:35:11,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:35:11,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7417197] [2023-12-02 19:35:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:11,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:35:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 19:35:12,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:35:12,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7417197] [2023-12-02 19:35:12,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7417197] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:35:12,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:35:12,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:35:12,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731063594] [2023-12-02 19:35:12,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:35:12,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:35:12,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:35:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:35:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:35:12,031 INFO L87 Difference]: Start difference. First operand 70534 states and 212689 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2023-12-02 19:35:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:35:12,874 INFO L93 Difference]: Finished difference Result 87229 states and 259500 transitions. [2023-12-02 19:35:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:35:12,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 82 [2023-12-02 19:35:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:35:13,081 INFO L225 Difference]: With dead ends: 87229 [2023-12-02 19:35:13,081 INFO L226 Difference]: Without dead ends: 87229 [2023-12-02 19:35:13,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:35:13,081 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 138 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:35:13,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 240 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:35:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87229 states. [2023-12-02 19:35:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87229 to 75274. [2023-12-02 19:35:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75274 states, 75247 states have (on average 2.9991228886201444) internal successors, (225675), 75273 states have internal predecessors, (225675), 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) [2023-12-02 19:35:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75274 states to 75274 states and 225675 transitions. [2023-12-02 19:35:14,620 INFO L78 Accepts]: Start accepts. Automaton has 75274 states and 225675 transitions. Word has length 82 [2023-12-02 19:35:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:35:14,620 INFO L495 AbstractCegarLoop]: Abstraction has 75274 states and 225675 transitions. [2023-12-02 19:35:14,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2023-12-02 19:35:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 75274 states and 225675 transitions. [2023-12-02 19:35:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 19:35:14,813 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:35:14,813 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:35:14,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-12-02 19:35:14,813 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:35:14,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:35:14,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1485729915, now seen corresponding path program 1 times [2023-12-02 19:35:14,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:35:14,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287110060] [2023-12-02 19:35:14,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:14,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:35:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 19:35:15,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:35:15,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287110060] [2023-12-02 19:35:15,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287110060] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:35:15,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:35:15,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:35:15,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686914671] [2023-12-02 19:35:15,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:35:15,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:35:15,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:35:15,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:35:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:35:15,232 INFO L87 Difference]: Start difference. First operand 75274 states and 225675 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-12-02 19:35:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:35:16,497 INFO L93 Difference]: Finished difference Result 130067 states and 386595 transitions. [2023-12-02 19:35:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:35:16,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 83 [2023-12-02 19:35:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:35:16,828 INFO L225 Difference]: With dead ends: 130067 [2023-12-02 19:35:16,828 INFO L226 Difference]: Without dead ends: 130067 [2023-12-02 19:35:16,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:35:16,829 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 199 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:35:16,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 196 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:35:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130067 states. [2023-12-02 19:35:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130067 to 86700. [2023-12-02 19:35:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86700 states, 86673 states have (on average 3.010199254669851) internal successors, (260903), 86699 states have internal predecessors, (260903), 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) [2023-12-02 19:35:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86700 states to 86700 states and 260903 transitions. [2023-12-02 19:35:19,099 INFO L78 Accepts]: Start accepts. Automaton has 86700 states and 260903 transitions. Word has length 83 [2023-12-02 19:35:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:35:19,100 INFO L495 AbstractCegarLoop]: Abstraction has 86700 states and 260903 transitions. [2023-12-02 19:35:19,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-12-02 19:35:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 86700 states and 260903 transitions. [2023-12-02 19:35:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 19:35:19,134 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:35:19,134 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:35:19,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-12-02 19:35:19,134 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:35:19,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:35:19,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1660763519, now seen corresponding path program 2 times [2023-12-02 19:35:19,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:35:19,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144331543] [2023-12-02 19:35:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:19,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:35:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:35:19,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:35:19,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144331543] [2023-12-02 19:35:19,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144331543] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:35:19,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:35:19,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:35:19,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541935177] [2023-12-02 19:35:19,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:35:19,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:35:19,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:35:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:35:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:35:19,562 INFO L87 Difference]: Start difference. First operand 86700 states and 260903 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2023-12-02 19:35:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:35:20,919 INFO L93 Difference]: Finished difference Result 125317 states and 372178 transitions. [2023-12-02 19:35:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 19:35:20,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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 83 [2023-12-02 19:35:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:35:21,253 INFO L225 Difference]: With dead ends: 125317 [2023-12-02 19:35:21,253 INFO L226 Difference]: Without dead ends: 125317 [2023-12-02 19:35:21,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:35:21,254 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 269 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:35:21,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 256 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:35:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125317 states. [2023-12-02 19:35:22,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125317 to 81475. [2023-12-02 19:35:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81475 states, 81453 states have (on average 2.9803813241992314) internal successors, (242761), 81474 states have internal predecessors, (242761), 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) [2023-12-02 19:35:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81475 states to 81475 states and 242761 transitions. [2023-12-02 19:35:23,204 INFO L78 Accepts]: Start accepts. Automaton has 81475 states and 242761 transitions. Word has length 83 [2023-12-02 19:35:23,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:35:23,204 INFO L495 AbstractCegarLoop]: Abstraction has 81475 states and 242761 transitions. [2023-12-02 19:35:23,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2023-12-02 19:35:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 81475 states and 242761 transitions. [2023-12-02 19:35:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:35:23,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:35:23,226 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:35:23,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-12-02 19:35:23,226 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:35:23,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:35:23,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1839370347, now seen corresponding path program 1 times [2023-12-02 19:35:23,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:35:23,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314162009] [2023-12-02 19:35:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:23,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:35:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:35:25,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:35:25,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314162009] [2023-12-02 19:35:25,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314162009] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:35:25,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039521307] [2023-12-02 19:35:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:25,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:35:25,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:35:25,236 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:35:25,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 19:35:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:25,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 19:35:25,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:35:26,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 19:35:26,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2023-12-02 19:35:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:35:26,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:35:31,882 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-12-02 19:35:31,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 55 [2023-12-02 19:35:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:35:31,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039521307] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:35:31,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475277528] [2023-12-02 19:35:32,001 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:35:32,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:35:32,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 23] total 62 [2023-12-02 19:35:32,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958463486] [2023-12-02 19:35:32,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:35:32,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 19:35:32,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:35:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 19:35:32,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=3401, Unknown=1, NotChecked=0, Total=3782 [2023-12-02 19:35:32,004 INFO L87 Difference]: Start difference. First operand 81475 states and 242761 transitions. Second operand has 62 states, 62 states have (on average 2.7903225806451615) internal successors, (173), 62 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:35:58,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:36:01,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:36:06,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:06,619 INFO L93 Difference]: Finished difference Result 108201 states and 318581 transitions. [2023-12-02 19:36:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2023-12-02 19:36:06,620 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.7903225806451615) internal successors, (173), 62 states have internal predecessors, (173), 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 84 [2023-12-02 19:36:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:06,903 INFO L225 Difference]: With dead ends: 108201 [2023-12-02 19:36:06,903 INFO L226 Difference]: Without dead ends: 107185 [2023-12-02 19:36:06,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38071 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=12038, Invalid=86243, Unknown=1, NotChecked=0, Total=98282 [2023-12-02 19:36:06,921 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 5459 mSDsluCounter, 6738 mSDsCounter, 0 mSdLazyCounter, 15829 mSolverCounterSat, 287 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5459 SdHoareTripleChecker+Valid, 7004 SdHoareTripleChecker+Invalid, 16118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 15829 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:06,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5459 Valid, 7004 Invalid, 16118 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [287 Valid, 15829 Invalid, 2 Unknown, 0 Unchecked, 15.5s Time] [2023-12-02 19:36:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107185 states. [2023-12-02 19:36:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107185 to 83761. [2023-12-02 19:36:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83761 states, 83739 states have (on average 2.980343686932015) internal successors, (249571), 83760 states have internal predecessors, (249571), 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) [2023-12-02 19:36:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83761 states to 83761 states and 249571 transitions. [2023-12-02 19:36:08,931 INFO L78 Accepts]: Start accepts. Automaton has 83761 states and 249571 transitions. Word has length 84 [2023-12-02 19:36:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:08,931 INFO L495 AbstractCegarLoop]: Abstraction has 83761 states and 249571 transitions. [2023-12-02 19:36:08,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.7903225806451615) internal successors, (173), 62 states have internal predecessors, (173), 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) [2023-12-02 19:36:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 83761 states and 249571 transitions. [2023-12-02 19:36:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:36:08,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:08,957 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:36:08,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 19:36:09,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:09,158 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:36:09,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash -206565778, now seen corresponding path program 1 times [2023-12-02 19:36:09,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:09,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136451770] [2023-12-02 19:36:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:09,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 19:36:09,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:09,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136451770] [2023-12-02 19:36:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136451770] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:36:09,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:36:09,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 19:36:09,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178962355] [2023-12-02 19:36:09,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:09,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:36:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:36:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:36:09,556 INFO L87 Difference]: Start difference. First operand 83761 states and 249571 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2023-12-02 19:36:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:11,413 INFO L93 Difference]: Finished difference Result 143773 states and 422391 transitions. [2023-12-02 19:36:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 19:36:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 84 [2023-12-02 19:36:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:11,803 INFO L225 Difference]: With dead ends: 143773 [2023-12-02 19:36:11,803 INFO L226 Difference]: Without dead ends: 143773 [2023-12-02 19:36:11,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:36:11,804 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 358 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:11,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 482 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 19:36:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143773 states. [2023-12-02 19:36:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143773 to 118137. [2023-12-02 19:36:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118137 states, 118115 states have (on average 2.963230749693096) internal successors, (350002), 118136 states have internal predecessors, (350002), 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) [2023-12-02 19:36:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118137 states to 118137 states and 350002 transitions. [2023-12-02 19:36:15,085 INFO L78 Accepts]: Start accepts. Automaton has 118137 states and 350002 transitions. Word has length 84 [2023-12-02 19:36:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:15,085 INFO L495 AbstractCegarLoop]: Abstraction has 118137 states and 350002 transitions. [2023-12-02 19:36:15,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2023-12-02 19:36:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 118137 states and 350002 transitions. [2023-12-02 19:36:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:36:15,117 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:15,117 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:36:15,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-12-02 19:36:15,118 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:36:15,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1626717081, now seen corresponding path program 2 times [2023-12-02 19:36:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:15,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439799730] [2023-12-02 19:36:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:15,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:36:17,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:17,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439799730] [2023-12-02 19:36:17,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439799730] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:17,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815838603] [2023-12-02 19:36:17,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:36:17,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:17,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:17,320 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:17,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 19:36:17,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 19:36:17,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:36:17,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 19:36:17,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:18,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 19:36:18,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2023-12-02 19:36:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:36:18,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:22,421 INFO L349 Elim1Store]: treesize reduction 5, result has 92.6 percent of original size [2023-12-02 19:36:22,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 102 [2023-12-02 19:36:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:36:22,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815838603] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:22,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492247478] [2023-12-02 19:36:22,758 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:36:22,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:22,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 23] total 65 [2023-12-02 19:36:22,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847266986] [2023-12-02 19:36:22,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:22,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-02 19:36:22,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:22,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-02 19:36:22,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3750, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 19:36:22,761 INFO L87 Difference]: Start difference. First operand 118137 states and 350002 transitions. Second operand has 65 states, 65 states have (on average 2.6615384615384614) internal successors, (173), 65 states have internal predecessors, (173), 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) [2023-12-02 19:36:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:50,839 INFO L93 Difference]: Finished difference Result 166729 states and 487622 transitions. [2023-12-02 19:36:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2023-12-02 19:36:50,840 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6615384615384614) internal successors, (173), 65 states have internal predecessors, (173), 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 84 [2023-12-02 19:36:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:51,291 INFO L225 Difference]: With dead ends: 166729 [2023-12-02 19:36:51,291 INFO L226 Difference]: Without dead ends: 166650 [2023-12-02 19:36:51,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26215 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=7015, Invalid=60845, Unknown=0, NotChecked=0, Total=67860 [2023-12-02 19:36:51,295 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 3529 mSDsluCounter, 6668 mSDsCounter, 0 mSdLazyCounter, 15911 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3529 SdHoareTripleChecker+Valid, 6947 SdHoareTripleChecker+Invalid, 16080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 15911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:51,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3529 Valid, 6947 Invalid, 16080 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [169 Valid, 15911 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2023-12-02 19:36:51,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166650 states. [2023-12-02 19:36:54,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166650 to 118617. [2023-12-02 19:36:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118617 states, 118595 states have (on average 2.9637505797040347) internal successors, (351486), 118616 states have internal predecessors, (351486), 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) [2023-12-02 19:36:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118617 states to 118617 states and 351486 transitions. [2023-12-02 19:36:54,746 INFO L78 Accepts]: Start accepts. Automaton has 118617 states and 351486 transitions. Word has length 84 [2023-12-02 19:36:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:54,746 INFO L495 AbstractCegarLoop]: Abstraction has 118617 states and 351486 transitions. [2023-12-02 19:36:54,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6615384615384614) internal successors, (173), 65 states have internal predecessors, (173), 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) [2023-12-02 19:36:54,747 INFO L276 IsEmpty]: Start isEmpty. Operand 118617 states and 351486 transitions. [2023-12-02 19:36:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:36:54,779 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:54,779 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:36:54,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 19:36:54,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:54,979 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:36:54,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:54,980 INFO L85 PathProgramCache]: Analyzing trace with hash 34181479, now seen corresponding path program 3 times [2023-12-02 19:36:54,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:54,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357264034] [2023-12-02 19:36:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:36:56,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:56,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357264034] [2023-12-02 19:36:56,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357264034] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:56,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712140709] [2023-12-02 19:36:56,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:36:56,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:56,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:56,972 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:56,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 19:36:57,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:36:57,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:36:57,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 19:36:57,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:58,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 19:36:58,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2023-12-02 19:36:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:36:58,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:37:01,204 INFO L349 Elim1Store]: treesize reduction 35, result has 78.0 percent of original size [2023-12-02 19:37:01,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 163 [2023-12-02 19:37:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:37:01,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712140709] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:37:01,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [953012495] [2023-12-02 19:37:01,309 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:37:01,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:37:01,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 20] total 58 [2023-12-02 19:37:01,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16745109] [2023-12-02 19:37:01,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:37:01,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-02 19:37:01,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:37:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-02 19:37:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=3041, Unknown=0, NotChecked=0, Total=3306 [2023-12-02 19:37:01,311 INFO L87 Difference]: Start difference. First operand 118617 states and 351486 transitions. Second operand has 58 states, 58 states have (on average 2.9827586206896552) internal successors, (173), 58 states have internal predecessors, (173), 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) [2023-12-02 19:37:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:37:42,450 INFO L93 Difference]: Finished difference Result 187432 states and 546361 transitions. [2023-12-02 19:37:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2023-12-02 19:37:42,450 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9827586206896552) internal successors, (173), 58 states have internal predecessors, (173), 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 84 [2023-12-02 19:37:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:37:42,975 INFO L225 Difference]: With dead ends: 187432 [2023-12-02 19:37:42,975 INFO L226 Difference]: Without dead ends: 187158 [2023-12-02 19:37:42,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55338 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=12285, Invalid=122037, Unknown=0, NotChecked=0, Total=134322 [2023-12-02 19:37:42,982 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 5257 mSDsluCounter, 7661 mSDsCounter, 0 mSdLazyCounter, 20787 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5257 SdHoareTripleChecker+Valid, 7970 SdHoareTripleChecker+Invalid, 21199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 20787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:37:42,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5257 Valid, 7970 Invalid, 21199 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [412 Valid, 20787 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2023-12-02 19:37:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187158 states. [2023-12-02 19:37:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187158 to 118950. [2023-12-02 19:37:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118950 states, 118928 states have (on average 2.9635745997578367) internal successors, (352452), 118949 states have internal predecessors, (352452), 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) [2023-12-02 19:37:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118950 states to 118950 states and 352452 transitions. [2023-12-02 19:37:46,538 INFO L78 Accepts]: Start accepts. Automaton has 118950 states and 352452 transitions. Word has length 84 [2023-12-02 19:37:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:37:46,538 INFO L495 AbstractCegarLoop]: Abstraction has 118950 states and 352452 transitions. [2023-12-02 19:37:46,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9827586206896552) internal successors, (173), 58 states have internal predecessors, (173), 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) [2023-12-02 19:37:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 118950 states and 352452 transitions. [2023-12-02 19:37:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:37:46,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:37:46,571 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:37:46,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 19:37:46,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:37:46,772 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:37:46,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:37:46,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2145718263, now seen corresponding path program 4 times [2023-12-02 19:37:46,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:37:46,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319689989] [2023-12-02 19:37:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:37:46,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:37:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:37:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:37:48,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:37:48,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319689989] [2023-12-02 19:37:48,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319689989] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:37:48,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078336262] [2023-12-02 19:37:48,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:37:48,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:37:48,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:37:48,696 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:37:48,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 19:37:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:37:48,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 19:37:48,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:37:49,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 19:37:49,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2023-12-02 19:37:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:37:50,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:37:54,706 INFO L349 Elim1Store]: treesize reduction 5, result has 92.6 percent of original size [2023-12-02 19:37:54,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 102 [2023-12-02 19:37:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:37:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078336262] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:37:54,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [645515362] [2023-12-02 19:37:54,799 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:37:54,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:37:54,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 62 [2023-12-02 19:37:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811265188] [2023-12-02 19:37:54,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:37:54,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 19:37:54,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:37:54,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 19:37:54,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3372, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 19:37:54,801 INFO L87 Difference]: Start difference. First operand 118950 states and 352452 transitions. Second operand has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:38:11,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:38:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:38:20,136 INFO L93 Difference]: Finished difference Result 148519 states and 436754 transitions. [2023-12-02 19:38:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-12-02 19:38:20,137 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 62 states have internal predecessors, (166), 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 84 [2023-12-02 19:38:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:38:20,735 INFO L225 Difference]: With dead ends: 148519 [2023-12-02 19:38:20,735 INFO L226 Difference]: Without dead ends: 148446 [2023-12-02 19:38:20,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11537 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=3506, Invalid=29800, Unknown=0, NotChecked=0, Total=33306 [2023-12-02 19:38:20,737 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 1714 mSDsluCounter, 6069 mSDsCounter, 0 mSdLazyCounter, 16030 mSolverCounterSat, 99 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 6277 SdHoareTripleChecker+Invalid, 16130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 16030 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:38:20,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1714 Valid, 6277 Invalid, 16130 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [99 Valid, 16030 Invalid, 1 Unknown, 0 Unchecked, 15.6s Time] [2023-12-02 19:38:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148446 states. [2023-12-02 19:38:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148446 to 119133. [2023-12-02 19:38:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119133 states, 119111 states have (on average 2.9637229139206287) internal successors, (353012), 119132 states have internal predecessors, (353012), 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) [2023-12-02 19:38:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119133 states to 119133 states and 353012 transitions. [2023-12-02 19:38:23,656 INFO L78 Accepts]: Start accepts. Automaton has 119133 states and 353012 transitions. Word has length 84 [2023-12-02 19:38:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:38:23,657 INFO L495 AbstractCegarLoop]: Abstraction has 119133 states and 353012 transitions. [2023-12-02 19:38:23,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 62 states have internal predecessors, (166), 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) [2023-12-02 19:38:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 119133 states and 353012 transitions. [2023-12-02 19:38:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:38:23,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:38:23,691 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:38:23,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 19:38:23,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-02 19:38:23,891 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:38:23,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:38:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash -545755961, now seen corresponding path program 5 times [2023-12-02 19:38:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:38:23,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265140286] [2023-12-02 19:38:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:38:23,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:38:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:38:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:38:26,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:38:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265140286] [2023-12-02 19:38:26,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265140286] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:38:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94302036] [2023-12-02 19:38:26,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:38:26,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:38:26,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:38:26,045 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:38:26,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 19:38:26,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:38:26,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:38:26,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-02 19:38:26,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:38:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:38:27,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:38:30,869 INFO L349 Elim1Store]: treesize reduction 35, result has 78.0 percent of original size [2023-12-02 19:38:30,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 163 [2023-12-02 19:38:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:38:31,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94302036] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:38:31,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599000928] [2023-12-02 19:38:31,032 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:38:31,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:38:31,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 22] total 61 [2023-12-02 19:38:31,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220071023] [2023-12-02 19:38:31,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:38:31,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 19:38:31,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:38:31,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 19:38:31,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=3274, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 19:38:31,035 INFO L87 Difference]: Start difference. First operand 119133 states and 353012 transitions. Second operand has 61 states, 61 states have (on average 2.721311475409836) internal successors, (166), 61 states have internal predecessors, (166), 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) [2023-12-02 19:39:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:39:09,140 INFO L93 Difference]: Finished difference Result 176641 states and 516560 transitions. [2023-12-02 19:39:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2023-12-02 19:39:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.721311475409836) internal successors, (166), 61 states have internal predecessors, (166), 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 84 [2023-12-02 19:39:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:39:09,634 INFO L225 Difference]: With dead ends: 176641 [2023-12-02 19:39:09,634 INFO L226 Difference]: Without dead ends: 176394 [2023-12-02 19:39:09,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44292 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=10666, Invalid=103916, Unknown=0, NotChecked=0, Total=114582 [2023-12-02 19:39:09,639 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 4010 mSDsluCounter, 8426 mSDsCounter, 0 mSdLazyCounter, 21951 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4010 SdHoareTripleChecker+Valid, 8735 SdHoareTripleChecker+Invalid, 22213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 21951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:39:09,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4010 Valid, 8735 Invalid, 22213 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [262 Valid, 21951 Invalid, 0 Unknown, 0 Unchecked, 17.0s Time] [2023-12-02 19:39:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176394 states. [2023-12-02 19:39:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176394 to 119724. [2023-12-02 19:39:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119724 states, 119702 states have (on average 2.9641359375783196) internal successors, (354813), 119723 states have internal predecessors, (354813), 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) [2023-12-02 19:39:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119724 states to 119724 states and 354813 transitions. [2023-12-02 19:39:13,351 INFO L78 Accepts]: Start accepts. Automaton has 119724 states and 354813 transitions. Word has length 84 [2023-12-02 19:39:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:39:13,352 INFO L495 AbstractCegarLoop]: Abstraction has 119724 states and 354813 transitions. [2023-12-02 19:39:13,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.721311475409836) internal successors, (166), 61 states have internal predecessors, (166), 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) [2023-12-02 19:39:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 119724 states and 354813 transitions. [2023-12-02 19:39:13,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:39:13,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:13,391 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:39:13,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 19:39:13,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-12-02 19:39:13,595 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:39:13,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1647038715, now seen corresponding path program 6 times [2023-12-02 19:39:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:13,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521530609] [2023-12-02 19:39:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:39:15,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:39:15,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521530609] [2023-12-02 19:39:15,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521530609] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:39:15,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117590221] [2023-12-02 19:39:15,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:39:15,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:39:15,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:39:15,419 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:39:15,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 19:39:15,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:39:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:39:15,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 19:39:15,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:39:16,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 19:39:16,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2023-12-02 19:39:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:39:16,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:39:24,743 INFO L349 Elim1Store]: treesize reduction 13, result has 92.4 percent of original size [2023-12-02 19:39:24,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 210 [2023-12-02 19:39:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:39:24,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117590221] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:39:24,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078488732] [2023-12-02 19:39:24,906 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:39:24,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:39:24,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 22] total 57 [2023-12-02 19:39:24,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74588897] [2023-12-02 19:39:24,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:39:24,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 19:39:24,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:39:24,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 19:39:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2862, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 19:39:24,909 INFO L87 Difference]: Start difference. First operand 119724 states and 354813 transitions. Second operand has 57 states, 57 states have (on average 2.8421052631578947) internal successors, (162), 57 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:39:30,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:33,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:35,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:37,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:39,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:42,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:44,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:47,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:50,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:52,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:54,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:39:56,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:00,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:02,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:12,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:15,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:17,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:19,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:21,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:24,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:26,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:38,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:42,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:44,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:40:52,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:07,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:09,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:16,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:18,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:36,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:46,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:48,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:50,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:52,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:54,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:56,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:41:58,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:00,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:02,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:04,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:06,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:09,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:11,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:16,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:18,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:24,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:26,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:29,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:31,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:33,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:35,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:37,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:39,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:41,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:44,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:46,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:48,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:50,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:52,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:54,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:57,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:42:59,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:01,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:03,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:06,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:08,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:10,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:12,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:14,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:16,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:18,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:20,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:22,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:26,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:28,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:30,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:32,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:34,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:36,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:38,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:40,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:42,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:44,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:43:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:43:51,405 INFO L93 Difference]: Finished difference Result 175441 states and 514699 transitions. [2023-12-02 19:43:51,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 418 states. [2023-12-02 19:43:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.8421052631578947) internal successors, (162), 57 states have internal predecessors, (162), 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 84 [2023-12-02 19:43:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:43:51,889 INFO L225 Difference]: With dead ends: 175441 [2023-12-02 19:43:51,889 INFO L226 Difference]: Without dead ends: 175254 [2023-12-02 19:43:51,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92707 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=16902, Invalid=201648, Unknown=6, NotChecked=0, Total=218556 [2023-12-02 19:43:51,898 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 4318 mSDsluCounter, 8684 mSDsCounter, 0 mSdLazyCounter, 25311 mSolverCounterSat, 334 mSolverCounterUnsat, 81 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 201.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4318 SdHoareTripleChecker+Valid, 8962 SdHoareTripleChecker+Invalid, 25726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 25311 IncrementalHoareTripleChecker+Invalid, 81 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 204.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:43:51,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4318 Valid, 8962 Invalid, 25726 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [334 Valid, 25311 Invalid, 81 Unknown, 0 Unchecked, 204.3s Time] [2023-12-02 19:43:52,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175254 states. [2023-12-02 19:43:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175254 to 120228. [2023-12-02 19:43:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120228 states, 120206 states have (on average 2.964885280268872) internal successors, (356397), 120227 states have internal predecessors, (356397), 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) [2023-12-02 19:43:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120228 states to 120228 states and 356397 transitions. [2023-12-02 19:43:55,738 INFO L78 Accepts]: Start accepts. Automaton has 120228 states and 356397 transitions. Word has length 84 [2023-12-02 19:43:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:43:55,738 INFO L495 AbstractCegarLoop]: Abstraction has 120228 states and 356397 transitions. [2023-12-02 19:43:55,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.8421052631578947) internal successors, (162), 57 states have internal predecessors, (162), 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) [2023-12-02 19:43:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 120228 states and 356397 transitions. [2023-12-02 19:43:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:43:55,771 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:43:55,771 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:43:55,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 19:43:55,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-12-02 19:43:55,972 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:43:55,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:43:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1688735117, now seen corresponding path program 7 times [2023-12-02 19:43:55,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:43:55,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003390439] [2023-12-02 19:43:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:43:55,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:43:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:43:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:43:58,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:43:58,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003390439] [2023-12-02 19:43:58,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003390439] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:43:58,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383171781] [2023-12-02 19:43:58,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:43:58,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:43:58,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:43:58,055 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:43:58,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 19:43:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:43:58,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 19:43:58,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:43:59,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 19:43:59,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2023-12-02 19:43:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:43:59,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:44:04,357 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-12-02 19:44:04,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 55 [2023-12-02 19:44:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:44:04,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383171781] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:44:04,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [463351487] [2023-12-02 19:44:04,450 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:44:04,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:44:04,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25] total 63 [2023-12-02 19:44:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870280938] [2023-12-02 19:44:04,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:44:04,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-02 19:44:04,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:44:04,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-02 19:44:04,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3474, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 19:44:04,452 INFO L87 Difference]: Start difference. First operand 120228 states and 356397 transitions. Second operand has 63 states, 63 states have (on average 2.619047619047619) internal successors, (165), 63 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:44:15,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:44:17,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:44:20,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:44:22,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 19:44:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:44:47,900 INFO L93 Difference]: Finished difference Result 147271 states and 433609 transitions. [2023-12-02 19:44:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-12-02 19:44:47,901 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.619047619047619) internal successors, (165), 63 states have internal predecessors, (165), 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 84 [2023-12-02 19:44:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:44:48,290 INFO L225 Difference]: With dead ends: 147271 [2023-12-02 19:44:48,290 INFO L226 Difference]: Without dead ends: 146883 [2023-12-02 19:44:48,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11466 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=3628, Invalid=30042, Unknown=2, NotChecked=0, Total=33672 [2023-12-02 19:44:48,292 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 1822 mSDsluCounter, 5672 mSDsCounter, 0 mSdLazyCounter, 12950 mSolverCounterSat, 113 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 5907 SdHoareTripleChecker+Invalid, 13067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 12950 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2023-12-02 19:44:48,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1822 Valid, 5907 Invalid, 13067 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [113 Valid, 12950 Invalid, 4 Unknown, 0 Unchecked, 26.9s Time] [2023-12-02 19:44:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146883 states. [2023-12-02 19:44:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146883 to 120492. [2023-12-02 19:44:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120492 states, 120470 states have (on average 2.96505354030049) internal successors, (357200), 120491 states have internal predecessors, (357200), 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) [2023-12-02 19:44:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120492 states to 120492 states and 357200 transitions. [2023-12-02 19:44:51,317 INFO L78 Accepts]: Start accepts. Automaton has 120492 states and 357200 transitions. Word has length 84 [2023-12-02 19:44:51,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:44:51,318 INFO L495 AbstractCegarLoop]: Abstraction has 120492 states and 357200 transitions. [2023-12-02 19:44:51,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.619047619047619) internal successors, (165), 63 states have internal predecessors, (165), 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) [2023-12-02 19:44:51,318 INFO L276 IsEmpty]: Start isEmpty. Operand 120492 states and 357200 transitions. [2023-12-02 19:44:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:44:51,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:44:51,349 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:44:51,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 19:44:51,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-02 19:44:51,550 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:44:51,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:44:51,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1788196493, now seen corresponding path program 8 times [2023-12-02 19:44:51,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:44:51,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693521905] [2023-12-02 19:44:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:44:51,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:44:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:44:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:44:53,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:44:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693521905] [2023-12-02 19:44:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693521905] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:44:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030988519] [2023-12-02 19:44:53,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:44:53,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:44:53,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:44:53,756 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:44:53,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 19:44:54,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:44:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:44:54,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 19:44:54,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:44:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:44:55,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:45:00,781 INFO L349 Elim1Store]: treesize reduction 35, result has 78.0 percent of original size [2023-12-02 19:45:00,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 163 [2023-12-02 19:45:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:45:06,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030988519] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:45:06,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949979801] [2023-12-02 19:45:06,811 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:45:06,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:45:06,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 61 [2023-12-02 19:45:06,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129347012] [2023-12-02 19:45:06,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:45:06,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 19:45:06,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:45:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 19:45:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=3295, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 19:45:06,814 INFO L87 Difference]: Start difference. First operand 120492 states and 357200 transitions. Second operand has 61 states, 61 states have (on average 2.6557377049180326) internal successors, (162), 61 states have internal predecessors, (162), 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) [2023-12-02 19:45:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:45:48,926 INFO L93 Difference]: Finished difference Result 158536 states and 465482 transitions. [2023-12-02 19:45:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2023-12-02 19:45:48,927 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.6557377049180326) internal successors, (162), 61 states have internal predecessors, (162), 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 84 [2023-12-02 19:45:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:45:49,346 INFO L225 Difference]: With dead ends: 158536 [2023-12-02 19:45:49,346 INFO L226 Difference]: Without dead ends: 158097 [2023-12-02 19:45:49,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12723 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=4263, Invalid=34349, Unknown=0, NotChecked=0, Total=38612 [2023-12-02 19:45:49,349 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 2915 mSDsluCounter, 7415 mSDsCounter, 0 mSdLazyCounter, 17263 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2915 SdHoareTripleChecker+Valid, 7690 SdHoareTripleChecker+Invalid, 17446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 17263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:45:49,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2915 Valid, 7690 Invalid, 17446 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [183 Valid, 17263 Invalid, 0 Unknown, 0 Unchecked, 25.2s Time] [2023-12-02 19:45:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158097 states. [2023-12-02 19:45:51,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158097 to 120537. [2023-12-02 19:45:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120537 states, 120515 states have (on average 2.9650914823880843) internal successors, (357338), 120536 states have internal predecessors, (357338), 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) [2023-12-02 19:45:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120537 states to 120537 states and 357338 transitions. [2023-12-02 19:45:52,316 INFO L78 Accepts]: Start accepts. Automaton has 120537 states and 357338 transitions. Word has length 84 [2023-12-02 19:45:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:45:52,316 INFO L495 AbstractCegarLoop]: Abstraction has 120537 states and 357338 transitions. [2023-12-02 19:45:52,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.6557377049180326) internal successors, (162), 61 states have internal predecessors, (162), 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) [2023-12-02 19:45:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 120537 states and 357338 transitions. [2023-12-02 19:45:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:45:52,344 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:52,344 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:45:52,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 19:45:52,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-02 19:45:52,544 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-12-02 19:45:52,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:52,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1497585437, now seen corresponding path program 9 times [2023-12-02 19:45:52,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:52,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195083717] [2023-12-02 19:45:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:45:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:45:55,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:45:55,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195083717] [2023-12-02 19:45:55,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195083717] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:45:55,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726062398] [2023-12-02 19:45:55,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:45:55,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:45:55,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:45:55,033 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:45:55,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d99d0e01-3b60-4559-8a31-2b3d46cda2ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 19:45:55,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:45:55,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:45:55,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 19:45:55,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:45:56,647 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 19:45:56,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2023-12-02 19:45:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:45:57,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:46:02,539 INFO L349 Elim1Store]: treesize reduction 35, result has 78.0 percent of original size [2023-12-02 19:46:02,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 163 [2023-12-02 19:46:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:46:02,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726062398] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:46:02,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370640667] [2023-12-02 19:46:02,686 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 19:46:02,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:46:02,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 22] total 57 [2023-12-02 19:46:02,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377203041] [2023-12-02 19:46:02,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:46:02,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 19:46:02,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:46:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 19:46:02,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=2856, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 19:46:02,687 INFO L87 Difference]: Start difference. First operand 120537 states and 357338 transitions. Second operand has 57 states, 57 states have (on average 2.8421052631578947) internal successors, (162), 57 states have internal predecessors, (162), 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) [2023-12-02 19:47:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:47:21,815 INFO L93 Difference]: Finished difference Result 196633 states and 573808 transitions. [2023-12-02 19:47:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2023-12-02 19:47:21,815 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.8421052631578947) internal successors, (162), 57 states have internal predecessors, (162), 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 84 [2023-12-02 19:47:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted.