./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/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_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/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_54d09c21-83d0-4f96-96cf-ae7982691249/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 5bf99dd5722e6551de991a345b21615b777cf7cef3d452afb8b79773fd45d3d8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:26:45,648 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:26:45,712 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 17:26:45,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:26:45,718 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:26:45,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:26:45,745 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:26:45,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:26:45,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:26:45,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:26:45,747 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:26:45,748 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:26:45,748 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:26:45,749 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:26:45,749 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:26:45,750 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:26:45,750 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:26:45,751 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:26:45,752 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:26:45,752 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:26:45,753 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:26:45,754 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:26:45,754 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 17:26:45,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 17:26:45,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:26:45,756 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:26:45,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:26:45,757 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:26:45,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:26:45,758 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 17:26:45,758 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 17:26:45,759 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 17:26:45,759 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:26:45,759 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 17:26:45,760 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 17:26:45,760 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:26:45,760 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:26:45,760 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:26:45,760 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:26:45,761 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:26:45,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:26:45,761 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:26:45,761 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:26:45,762 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:26:45,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:26:45,762 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:26:45,762 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:26:45,762 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:26:45,763 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_54d09c21-83d0-4f96-96cf-ae7982691249/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf99dd5722e6551de991a345b21615b777cf7cef3d452afb8b79773fd45d3d8 [2023-12-02 17:26:45,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:26:46,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:26:46,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:26:46,005 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:26:46,005 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:26:46,007 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-12-02 17:26:48,848 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:26:49,082 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:26:49,083 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-12-02 17:26:49,099 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh/data/7396588df/64037ae00da94dd0a3cb3ec21d9e9686/FLAG2984c9b7b [2023-12-02 17:26:49,113 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh/data/7396588df/64037ae00da94dd0a3cb3ec21d9e9686 [2023-12-02 17:26:49,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:26:49,118 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:26:49,119 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:26:49,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:26:49,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:26:49,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5677f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49, skipping insertion in model container [2023-12-02 17:26:49,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,183 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:26:49,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:26:49,500 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:26:49,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:26:49,584 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:26:49,584 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:26:49,591 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:26:49,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49 WrapperNode [2023-12-02 17:26:49,591 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:26:49,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:26:49,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:26:49,593 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:26:49,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,616 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,643 INFO L138 Inliner]: procedures = 172, calls = 40, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 110 [2023-12-02 17:26:49,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:26:49,645 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:26:49,645 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:26:49,645 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:26:49,653 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,657 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,665 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,670 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,672 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:26:49,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:26:49,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:26:49,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:26:49,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (1/1) ... [2023-12-02 17:26:49,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:26:49,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:49,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:26:49,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d09c21-83d0-4f96-96cf-ae7982691249/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:26:49,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:26:49,753 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-02 17:26:49,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-02 17:26:49,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:26:49,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 17:26:49,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:26:49,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:26:49,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:26:49,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:26:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 17:26:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:26:49,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:26:49,757 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 17:26:49,914 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:26:49,916 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:26:50,221 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:26:50,418 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:26:50,418 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 17:26:50,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:26:50 BoogieIcfgContainer [2023-12-02 17:26:50,419 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:26:50,422 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:26:50,422 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:26:50,425 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:26:50,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:26:49" (1/3) ... [2023-12-02 17:26:50,426 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200fdf48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:26:50, skipping insertion in model container [2023-12-02 17:26:50,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:26:49" (2/3) ... [2023-12-02 17:26:50,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200fdf48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:26:50, skipping insertion in model container [2023-12-02 17:26:50,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:26:50" (3/3) ... [2023-12-02 17:26:50,428 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2023-12-02 17:26:50,449 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:26:50,449 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-12-02 17:26:50,449 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 17:26:50,537 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 17:26:50,569 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 60 transitions, 124 flow [2023-12-02 17:26:50,623 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 477 states, 325 states have (on average 2.8276923076923075) internal successors, (919), 476 states have internal predecessors, (919), 0 states have call successors, (0), 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 17:26:50,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:26:50,646 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;@469f85d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:26:50,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2023-12-02 17:26:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 477 states, 325 states have (on average 2.8276923076923075) internal successors, (919), 476 states have internal predecessors, (919), 0 states have call successors, (0), 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 17:26:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 17:26:50,655 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:50,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 17:26:50,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 17:26:50,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash 401292, now seen corresponding path program 1 times [2023-12-02 17:26:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:50,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341432860] [2023-12-02 17:26:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:50,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:50,977 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 17:26:50,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:50,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341432860] [2023-12-02 17:26:50,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341432860] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:50,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:50,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 17:26:50,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634944299] [2023-12-02 17:26:50,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:50,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:50,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:51,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:51,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:51,018 INFO L87 Difference]: Start difference. First operand has 477 states, 325 states have (on average 2.8276923076923075) internal successors, (919), 476 states have internal predecessors, (919), 0 states have call successors, (0), 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 17:26:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:51,135 INFO L93 Difference]: Finished difference Result 269 states and 495 transitions. [2023-12-02 17:26:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:51,138 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 17:26:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:51,149 INFO L225 Difference]: With dead ends: 269 [2023-12-02 17:26:51,149 INFO L226 Difference]: Without dead ends: 269 [2023-12-02 17:26:51,151 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 17:26:51,155 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:51,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 11 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:51,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-12-02 17:26:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2023-12-02 17:26:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 214 states have (on average 2.3130841121495327) internal successors, (495), 268 states have internal predecessors, (495), 0 states have call successors, (0), 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 17:26:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 495 transitions. [2023-12-02 17:26:51,231 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 495 transitions. Word has length 3 [2023-12-02 17:26:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:51,232 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 495 transitions. [2023-12-02 17:26:51,232 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 17:26:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 495 transitions. [2023-12-02 17:26:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 17:26:51,233 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:51,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 17:26:51,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:26:51,234 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 17:26:51,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash 401291, now seen corresponding path program 1 times [2023-12-02 17:26:51,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:51,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451171218] [2023-12-02 17:26:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:51,304 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 17:26:51,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:51,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451171218] [2023-12-02 17:26:51,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451171218] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:51,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:51,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 17:26:51,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508660922] [2023-12-02 17:26:51,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:51,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:51,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:51,308 INFO L87 Difference]: Start difference. First operand 269 states and 495 transitions. 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 17:26:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:51,469 INFO L93 Difference]: Finished difference Result 467 states and 854 transitions. [2023-12-02 17:26:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:51,470 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 17:26:51,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:51,477 INFO L225 Difference]: With dead ends: 467 [2023-12-02 17:26:51,477 INFO L226 Difference]: Without dead ends: 467 [2023-12-02 17:26:51,477 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 17:26:51,479 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:51,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 22 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-12-02 17:26:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 381. [2023-12-02 17:26:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 380 states have internal predecessors, (723), 0 states have call successors, (0), 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 17:26:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 723 transitions. [2023-12-02 17:26:51,513 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 723 transitions. Word has length 3 [2023-12-02 17:26:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:51,513 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 723 transitions. [2023-12-02 17:26:51,514 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 17:26:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 723 transitions. [2023-12-02 17:26:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 17:26:51,514 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:51,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:26:51,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:26:51,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 17:26:51,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:51,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1246850362, now seen corresponding path program 1 times [2023-12-02 17:26:51,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:51,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608049026] [2023-12-02 17:26:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:51,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:51,672 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 17:26:51,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:51,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608049026] [2023-12-02 17:26:51,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608049026] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:51,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:51,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:26:51,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941360593] [2023-12-02 17:26:51,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:51,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:51,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:51,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:51,675 INFO L87 Difference]: Start difference. First operand 381 states and 723 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 17:26:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:51,770 INFO L93 Difference]: Finished difference Result 327 states and 621 transitions. [2023-12-02 17:26:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:51,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-12-02 17:26:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:51,774 INFO L225 Difference]: With dead ends: 327 [2023-12-02 17:26:51,774 INFO L226 Difference]: Without dead ends: 327 [2023-12-02 17:26:51,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:26:51,776 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:51,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 12 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-12-02 17:26:51,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2023-12-02 17:26:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 285 states have (on average 2.1789473684210527) internal successors, (621), 326 states have internal predecessors, (621), 0 states have call successors, (0), 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 17:26:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 621 transitions. [2023-12-02 17:26:51,795 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 621 transitions. Word has length 7 [2023-12-02 17:26:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:51,796 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 621 transitions. [2023-12-02 17:26:51,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 17:26:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 621 transitions. [2023-12-02 17:26:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 17:26:51,797 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:51,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:26:51,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:26:51,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 17:26:51,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:51,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1246850363, now seen corresponding path program 1 times [2023-12-02 17:26:51,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:51,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978995499] [2023-12-02 17:26:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:51,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:51,945 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 17:26:51,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:51,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978995499] [2023-12-02 17:26:51,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978995499] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:51,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:51,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:26:51,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83975366] [2023-12-02 17:26:51,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:51,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:51,948 INFO L87 Difference]: Start difference. First operand 327 states and 621 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 17:26:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:52,022 INFO L93 Difference]: Finished difference Result 273 states and 519 transitions. [2023-12-02 17:26:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:52,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-12-02 17:26:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:52,026 INFO L225 Difference]: With dead ends: 273 [2023-12-02 17:26:52,026 INFO L226 Difference]: Without dead ends: 273 [2023-12-02 17:26:52,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:26:52,027 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:52,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 14 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:26:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-02 17:26:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2023-12-02 17:26:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 243 states have (on average 2.1358024691358026) internal successors, (519), 272 states have internal predecessors, (519), 0 states have call successors, (0), 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 17:26:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 519 transitions. [2023-12-02 17:26:52,041 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 519 transitions. Word has length 7 [2023-12-02 17:26:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:52,041 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 519 transitions. [2023-12-02 17:26:52,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 17:26:52,042 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 519 transitions. [2023-12-02 17:26:52,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 17:26:52,042 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:52,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-12-02 17:26:52,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:26:52,043 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 17:26:52,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash -4051364, now seen corresponding path program 1 times [2023-12-02 17:26:52,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:52,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836217815] [2023-12-02 17:26:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:52,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 17:26:52,060 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 17:26:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 17:26:52,092 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 17:26:52,092 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 17:26:52,094 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (61 of 62 remaining) [2023-12-02 17:26:52,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 62 remaining) [2023-12-02 17:26:52,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 62 remaining) [2023-12-02 17:26:52,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 62 remaining) [2023-12-02 17:26:52,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 62 remaining) [2023-12-02 17:26:52,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 62 remaining) [2023-12-02 17:26:52,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 62 remaining) [2023-12-02 17:26:52,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 62 remaining) [2023-12-02 17:26:52,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 62 remaining) [2023-12-02 17:26:52,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (52 of 62 remaining) [2023-12-02 17:26:52,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 62 remaining) [2023-12-02 17:26:52,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 62 remaining) [2023-12-02 17:26:52,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 62 remaining) [2023-12-02 17:26:52,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 62 remaining) [2023-12-02 17:26:52,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 62 remaining) [2023-12-02 17:26:52,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 62 remaining) [2023-12-02 17:26:52,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (45 of 62 remaining) [2023-12-02 17:26:52,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (44 of 62 remaining) [2023-12-02 17:26:52,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 62 remaining) [2023-12-02 17:26:52,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 62 remaining) [2023-12-02 17:26:52,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 62 remaining) [2023-12-02 17:26:52,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 62 remaining) [2023-12-02 17:26:52,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 62 remaining) [2023-12-02 17:26:52,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 62 remaining) [2023-12-02 17:26:52,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 62 remaining) [2023-12-02 17:26:52,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 62 remaining) [2023-12-02 17:26:52,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 62 remaining) [2023-12-02 17:26:52,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 62 remaining) [2023-12-02 17:26:52,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 62 remaining) [2023-12-02 17:26:52,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 62 remaining) [2023-12-02 17:26:52,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 62 remaining) [2023-12-02 17:26:52,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 62 remaining) [2023-12-02 17:26:52,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (29 of 62 remaining) [2023-12-02 17:26:52,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 62 remaining) [2023-12-02 17:26:52,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 62 remaining) [2023-12-02 17:26:52,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 62 remaining) [2023-12-02 17:26:52,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 62 remaining) [2023-12-02 17:26:52,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 62 remaining) [2023-12-02 17:26:52,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 62 remaining) [2023-12-02 17:26:52,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 62 remaining) [2023-12-02 17:26:52,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 62 remaining) [2023-12-02 17:26:52,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (20 of 62 remaining) [2023-12-02 17:26:52,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 62 remaining) [2023-12-02 17:26:52,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 62 remaining) [2023-12-02 17:26:52,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 62 remaining) [2023-12-02 17:26:52,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 62 remaining) [2023-12-02 17:26:52,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 62 remaining) [2023-12-02 17:26:52,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 62 remaining) [2023-12-02 17:26:52,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (13 of 62 remaining) [2023-12-02 17:26:52,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (12 of 62 remaining) [2023-12-02 17:26:52,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 62 remaining) [2023-12-02 17:26:52,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 62 remaining) [2023-12-02 17:26:52,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 62 remaining) [2023-12-02 17:26:52,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 62 remaining) [2023-12-02 17:26:52,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 62 remaining) [2023-12-02 17:26:52,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 62 remaining) [2023-12-02 17:26:52,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 62 remaining) [2023-12-02 17:26:52,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 62 remaining) [2023-12-02 17:26:52,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 62 remaining) [2023-12-02 17:26:52,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 62 remaining) [2023-12-02 17:26:52,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 62 remaining) [2023-12-02 17:26:52,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 62 remaining) [2023-12-02 17:26:52,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:26:52,112 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-02 17:26:52,115 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 17:26:52,115 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-02 17:26:52,226 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 17:26:52,231 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 109 places, 110 transitions, 230 flow [2023-12-02 17:26:53,041 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 22519 states, 17898 states have (on average 3.7327075650910717) internal successors, (66808), 22518 states have internal predecessors, (66808), 0 states have call successors, (0), 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 17:26:53,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:26:53,043 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;@469f85d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:26:53,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 91 error locations. [2023-12-02 17:26:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 22519 states, 17898 states have (on average 3.7327075650910717) internal successors, (66808), 22518 states have internal predecessors, (66808), 0 states have call successors, (0), 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 17:26:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 17:26:53,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:53,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 17:26:53,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-12-02 17:26:53,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash 510521, now seen corresponding path program 1 times [2023-12-02 17:26:53,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:53,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164207757] [2023-12-02 17:26:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:53,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:53,115 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 17:26:53,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:53,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164207757] [2023-12-02 17:26:53,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164207757] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:53,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:53,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 17:26:53,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934595355] [2023-12-02 17:26:53,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:53,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:53,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:53,170 INFO L87 Difference]: Start difference. First operand has 22519 states, 17898 states have (on average 3.7327075650910717) internal successors, (66808), 22518 states have internal predecessors, (66808), 0 states have call successors, (0), 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 17:26:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:53,777 INFO L93 Difference]: Finished difference Result 24744 states and 71028 transitions. [2023-12-02 17:26:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:53,778 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 17:26:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:54,047 INFO L225 Difference]: With dead ends: 24744 [2023-12-02 17:26:54,048 INFO L226 Difference]: Without dead ends: 24744 [2023-12-02 17:26:54,048 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 17:26:54,049 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 92 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:54,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 43 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:26:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24744 states. [2023-12-02 17:26:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24744 to 19121. [2023-12-02 17:26:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19121 states, 16879 states have (on average 3.4140055690502993) internal successors, (57625), 19120 states have internal predecessors, (57625), 0 states have call successors, (0), 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 17:26:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19121 states to 19121 states and 57625 transitions. [2023-12-02 17:26:55,179 INFO L78 Accepts]: Start accepts. Automaton has 19121 states and 57625 transitions. Word has length 3 [2023-12-02 17:26:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:55,179 INFO L495 AbstractCegarLoop]: Abstraction has 19121 states and 57625 transitions. [2023-12-02 17:26:55,180 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 17:26:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 19121 states and 57625 transitions. [2023-12-02 17:26:55,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 17:26:55,180 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:55,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 17:26:55,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:26:55,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-12-02 17:26:55,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash 510522, now seen corresponding path program 1 times [2023-12-02 17:26:55,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:55,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737613889] [2023-12-02 17:26:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:55,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:55,228 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 17:26:55,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:55,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737613889] [2023-12-02 17:26:55,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737613889] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:55,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:55,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 17:26:55,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909533498] [2023-12-02 17:26:55,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:55,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:55,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:55,231 INFO L87 Difference]: Start difference. First operand 19121 states and 57625 transitions. 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 17:26:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:55,661 INFO L93 Difference]: Finished difference Result 17140 states and 49886 transitions. [2023-12-02 17:26:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:55,662 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 17:26:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:55,814 INFO L225 Difference]: With dead ends: 17140 [2023-12-02 17:26:55,814 INFO L226 Difference]: Without dead ends: 17140 [2023-12-02 17:26:55,814 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 17:26:55,818 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:55,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 21 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:26:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17140 states. [2023-12-02 17:26:56,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17140 to 17140. [2023-12-02 17:26:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17140 states, 15655 states have (on average 3.1865857553497285) internal successors, (49886), 17139 states have internal predecessors, (49886), 0 states have call successors, (0), 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 17:26:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17140 states to 17140 states and 49886 transitions. [2023-12-02 17:26:56,667 INFO L78 Accepts]: Start accepts. Automaton has 17140 states and 49886 transitions. Word has length 3 [2023-12-02 17:26:56,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:56,668 INFO L495 AbstractCegarLoop]: Abstraction has 17140 states and 49886 transitions. [2023-12-02 17:26:56,668 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 17:26:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17140 states and 49886 transitions. [2023-12-02 17:26:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 17:26:56,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:56,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:26:56,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 17:26:56,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-12-02 17:26:56,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:56,670 INFO L85 PathProgramCache]: Analyzing trace with hash -951271256, now seen corresponding path program 1 times [2023-12-02 17:26:56,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:56,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003330125] [2023-12-02 17:26:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:56,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:56,748 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 17:26:56,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:56,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003330125] [2023-12-02 17:26:56,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003330125] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:56,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:56,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:26:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919583939] [2023-12-02 17:26:56,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:56,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:56,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:56,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:56,750 INFO L87 Difference]: Start difference. First operand 17140 states and 49886 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 17:26:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:57,227 INFO L93 Difference]: Finished difference Result 24346 states and 70657 transitions. [2023-12-02 17:26:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-12-02 17:26:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:57,354 INFO L225 Difference]: With dead ends: 24346 [2023-12-02 17:26:57,354 INFO L226 Difference]: Without dead ends: 24346 [2023-12-02 17:26:57,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:26:57,356 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 80 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:57,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 60 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:26:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24346 states. [2023-12-02 17:26:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24346 to 19702. [2023-12-02 17:26:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19702 states, 18223 states have (on average 3.4042144542610986) internal successors, (62035), 19701 states have internal predecessors, (62035), 0 states have call successors, (0), 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 17:26:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19702 states to 19702 states and 62035 transitions. [2023-12-02 17:26:58,077 INFO L78 Accepts]: Start accepts. Automaton has 19702 states and 62035 transitions. Word has length 7 [2023-12-02 17:26:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:58,078 INFO L495 AbstractCegarLoop]: Abstraction has 19702 states and 62035 transitions. [2023-12-02 17:26:58,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 17:26:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19702 states and 62035 transitions. [2023-12-02 17:26:58,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 17:26:58,079 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:58,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:26:58,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 17:26:58,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-12-02 17:26:58,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash -951271255, now seen corresponding path program 1 times [2023-12-02 17:26:58,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:58,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567707694] [2023-12-02 17:26:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:58,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:58,152 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 17:26:58,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:58,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567707694] [2023-12-02 17:26:58,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567707694] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:58,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:58,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:26:58,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21840260] [2023-12-02 17:26:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:26:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:26:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:26:58,154 INFO L87 Difference]: Start difference. First operand 19702 states and 62035 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 17:26:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:58,403 INFO L93 Difference]: Finished difference Result 17362 states and 53731 transitions. [2023-12-02 17:26:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:26:58,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-12-02 17:26:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:58,463 INFO L225 Difference]: With dead ends: 17362 [2023-12-02 17:26:58,463 INFO L226 Difference]: Without dead ends: 17362 [2023-12-02 17:26:58,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:26:58,465 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 81 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:58,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 53 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:26:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17362 states. [2023-12-02 17:26:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17362 to 17362. [2023-12-02 17:26:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17362 states, 16213 states have (on average 3.3140689570098067) internal successors, (53731), 17361 states have internal predecessors, (53731), 0 states have call successors, (0), 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 17:26:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17362 states to 17362 states and 53731 transitions. [2023-12-02 17:26:59,088 INFO L78 Accepts]: Start accepts. Automaton has 17362 states and 53731 transitions. Word has length 7 [2023-12-02 17:26:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:59,088 INFO L495 AbstractCegarLoop]: Abstraction has 17362 states and 53731 transitions. [2023-12-02 17:26:59,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 17:26:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 17362 states and 53731 transitions. [2023-12-02 17:26:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 17:26:59,089 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:59,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:26:59,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:26:59,090 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-12-02 17:26:59,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1127068384, now seen corresponding path program 1 times [2023-12-02 17:26:59,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:59,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618004552] [2023-12-02 17:26:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:59,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:59,227 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 17:26:59,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:59,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618004552] [2023-12-02 17:26:59,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618004552] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:26:59,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:26:59,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:26:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42638523] [2023-12-02 17:26:59,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:26:59,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:26:59,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:26:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:26:59,231 INFO L87 Difference]: Start difference. First operand 17362 states and 53731 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 17:26:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:59,699 INFO L93 Difference]: Finished difference Result 18482 states and 56917 transitions. [2023-12-02 17:26:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:26:59,699 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 10 [2023-12-02 17:26:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:59,769 INFO L225 Difference]: With dead ends: 18482 [2023-12-02 17:26:59,769 INFO L226 Difference]: Without dead ends: 18482 [2023-12-02 17:26:59,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:26:59,770 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 94 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:59,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 188 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:26:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18482 states. [2023-12-02 17:27:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18482 to 17939. [2023-12-02 17:27:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17939 states, 16790 states have (on average 3.297260273972603) internal successors, (55361), 17938 states have internal predecessors, (55361), 0 states have call successors, (0), 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 17:27:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17939 states to 17939 states and 55361 transitions. [2023-12-02 17:27:00,369 INFO L78 Accepts]: Start accepts. Automaton has 17939 states and 55361 transitions. Word has length 10 [2023-12-02 17:27:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:00,370 INFO L495 AbstractCegarLoop]: Abstraction has 17939 states and 55361 transitions. [2023-12-02 17:27:00,370 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 17:27:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 17939 states and 55361 transitions. [2023-12-02 17:27:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 17:27:00,371 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:00,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:27:00,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 17:27:00,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-12-02 17:27:00,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1893160144, now seen corresponding path program 1 times [2023-12-02 17:27:00,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:00,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916731517] [2023-12-02 17:27:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:00,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:27:00,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:00,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916731517] [2023-12-02 17:27:00,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916731517] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:00,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:27:00,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:27:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675567679] [2023-12-02 17:27:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:00,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:27:00,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:00,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:27:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:27:00,452 INFO L87 Difference]: Start difference. First operand 17939 states and 55361 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:27:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:00,788 INFO L93 Difference]: Finished difference Result 22314 states and 67550 transitions. [2023-12-02 17:27:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:27:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 17:27:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:00,859 INFO L225 Difference]: With dead ends: 22314 [2023-12-02 17:27:00,859 INFO L226 Difference]: Without dead ends: 22314 [2023-12-02 17:27:00,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:27:00,860 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 73 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:00,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 48 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:27:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22314 states. [2023-12-02 17:27:01,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22314 to 18966. [2023-12-02 17:27:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18966 states, 17889 states have (on average 3.42691039186092) internal successors, (61304), 18965 states have internal predecessors, (61304), 0 states have call successors, (0), 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 17:27:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18966 states to 18966 states and 61304 transitions. [2023-12-02 17:27:01,464 INFO L78 Accepts]: Start accepts. Automaton has 18966 states and 61304 transitions. Word has length 11 [2023-12-02 17:27:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:01,465 INFO L495 AbstractCegarLoop]: Abstraction has 18966 states and 61304 transitions. [2023-12-02 17:27:01,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:27:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 18966 states and 61304 transitions. [2023-12-02 17:27:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 17:27:01,466 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:01,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:27:01,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 17:27:01,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-12-02 17:27:01,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1893160143, now seen corresponding path program 1 times [2023-12-02 17:27:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:01,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300836843] [2023-12-02 17:27:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:27:01,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:01,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300836843] [2023-12-02 17:27:01,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300836843] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:01,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:27:01,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:27:01,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606025978] [2023-12-02 17:27:01,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:01,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:27:01,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:27:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:27:01,588 INFO L87 Difference]: Start difference. First operand 18966 states and 61304 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:27:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:01,988 INFO L93 Difference]: Finished difference Result 16459 states and 52470 transitions. [2023-12-02 17:27:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:27:01,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 17:27:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:02,054 INFO L225 Difference]: With dead ends: 16459 [2023-12-02 17:27:02,054 INFO L226 Difference]: Without dead ends: 16459 [2023-12-02 17:27:02,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:27:02,055 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 74 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:02,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 49 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:27:02,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16459 states. [2023-12-02 17:27:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16459 to 16459. [2023-12-02 17:27:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16459 states, 15634 states have (on average 3.3561468594089803) internal successors, (52470), 16458 states have internal predecessors, (52470), 0 states have call successors, (0), 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 17:27:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16459 states to 16459 states and 52470 transitions. [2023-12-02 17:27:02,483 INFO L78 Accepts]: Start accepts. Automaton has 16459 states and 52470 transitions. Word has length 11 [2023-12-02 17:27:02,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:02,483 INFO L495 AbstractCegarLoop]: Abstraction has 16459 states and 52470 transitions. [2023-12-02 17:27:02,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:27:02,484 INFO L276 IsEmpty]: Start isEmpty. Operand 16459 states and 52470 transitions. [2023-12-02 17:27:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 17:27:02,484 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:02,484 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-12-02 17:27:02,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 17:27:02,484 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-12-02 17:27:02,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:02,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1439870917, now seen corresponding path program 1 times [2023-12-02 17:27:02,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:02,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847752156] [2023-12-02 17:27:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 17:27:02,498 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 17:27:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 17:27:02,512 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 17:27:02,512 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 17:27:02,513 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (90 of 91 remaining) [2023-12-02 17:27:02,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 91 remaining) [2023-12-02 17:27:02,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 91 remaining) [2023-12-02 17:27:02,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 91 remaining) [2023-12-02 17:27:02,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 91 remaining) [2023-12-02 17:27:02,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 91 remaining) [2023-12-02 17:27:02,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 91 remaining) [2023-12-02 17:27:02,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 91 remaining) [2023-12-02 17:27:02,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 91 remaining) [2023-12-02 17:27:02,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (81 of 91 remaining) [2023-12-02 17:27:02,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 91 remaining) [2023-12-02 17:27:02,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 91 remaining) [2023-12-02 17:27:02,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 91 remaining) [2023-12-02 17:27:02,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 91 remaining) [2023-12-02 17:27:02,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 91 remaining) [2023-12-02 17:27:02,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 91 remaining) [2023-12-02 17:27:02,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (74 of 91 remaining) [2023-12-02 17:27:02,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (73 of 91 remaining) [2023-12-02 17:27:02,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 91 remaining) [2023-12-02 17:27:02,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 91 remaining) [2023-12-02 17:27:02,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 91 remaining) [2023-12-02 17:27:02,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 91 remaining) [2023-12-02 17:27:02,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 91 remaining) [2023-12-02 17:27:02,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 91 remaining) [2023-12-02 17:27:02,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 91 remaining) [2023-12-02 17:27:02,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 91 remaining) [2023-12-02 17:27:02,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 91 remaining) [2023-12-02 17:27:02,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 91 remaining) [2023-12-02 17:27:02,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 91 remaining) [2023-12-02 17:27:02,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 91 remaining) [2023-12-02 17:27:02,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 91 remaining) [2023-12-02 17:27:02,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 91 remaining) [2023-12-02 17:27:02,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (58 of 91 remaining) [2023-12-02 17:27:02,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 91 remaining) [2023-12-02 17:27:02,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 91 remaining) [2023-12-02 17:27:02,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 91 remaining) [2023-12-02 17:27:02,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 91 remaining) [2023-12-02 17:27:02,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 91 remaining) [2023-12-02 17:27:02,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 91 remaining) [2023-12-02 17:27:02,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 91 remaining) [2023-12-02 17:27:02,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 91 remaining) [2023-12-02 17:27:02,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (49 of 91 remaining) [2023-12-02 17:27:02,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 91 remaining) [2023-12-02 17:27:02,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 91 remaining) [2023-12-02 17:27:02,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 91 remaining) [2023-12-02 17:27:02,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 91 remaining) [2023-12-02 17:27:02,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 91 remaining) [2023-12-02 17:27:02,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 91 remaining) [2023-12-02 17:27:02,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (42 of 91 remaining) [2023-12-02 17:27:02,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (41 of 91 remaining) [2023-12-02 17:27:02,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 91 remaining) [2023-12-02 17:27:02,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 91 remaining) [2023-12-02 17:27:02,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 91 remaining) [2023-12-02 17:27:02,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 91 remaining) [2023-12-02 17:27:02,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 91 remaining) [2023-12-02 17:27:02,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 91 remaining) [2023-12-02 17:27:02,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 91 remaining) [2023-12-02 17:27:02,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 91 remaining) [2023-12-02 17:27:02,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 91 remaining) [2023-12-02 17:27:02,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 91 remaining) [2023-12-02 17:27:02,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 91 remaining) [2023-12-02 17:27:02,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 91 remaining) [2023-12-02 17:27:02,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 91 remaining) [2023-12-02 17:27:02,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 91 remaining) [2023-12-02 17:27:02,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 91 remaining) [2023-12-02 17:27:02,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 91 remaining) [2023-12-02 17:27:02,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 91 remaining) [2023-12-02 17:27:02,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 91 remaining) [2023-12-02 17:27:02,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 91 remaining) [2023-12-02 17:27:02,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 91 remaining) [2023-12-02 17:27:02,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (20 of 91 remaining) [2023-12-02 17:27:02,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 91 remaining) [2023-12-02 17:27:02,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 91 remaining) [2023-12-02 17:27:02,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 91 remaining) [2023-12-02 17:27:02,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 91 remaining) [2023-12-02 17:27:02,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 91 remaining) [2023-12-02 17:27:02,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 91 remaining) [2023-12-02 17:27:02,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (13 of 91 remaining) [2023-12-02 17:27:02,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (12 of 91 remaining) [2023-12-02 17:27:02,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 91 remaining) [2023-12-02 17:27:02,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 91 remaining) [2023-12-02 17:27:02,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 91 remaining) [2023-12-02 17:27:02,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 91 remaining) [2023-12-02 17:27:02,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 91 remaining) [2023-12-02 17:27:02,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 91 remaining) [2023-12-02 17:27:02,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 91 remaining) [2023-12-02 17:27:02,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 91 remaining) [2023-12-02 17:27:02,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 91 remaining) [2023-12-02 17:27:02,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 91 remaining) [2023-12-02 17:27:02,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 91 remaining) [2023-12-02 17:27:02,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 91 remaining) [2023-12-02 17:27:02,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 17:27:02,528 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:27:02,528 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 17:27:02,529 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-02 17:27:02,650 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 17:27:02,654 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 158 places, 160 transitions, 338 flow [2023-12-02 17:27:30,126 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1058539 states, 919819 states have (on average 4.613771839894588) internal successors, (4243835), 1058538 states have internal predecessors, (4243835), 0 states have call successors, (0), 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 17:27:30,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:27:30,149 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;@469f85d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:27:30,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 120 error locations. [2023-12-02 17:27:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 1058539 states, 919819 states have (on average 4.613771839894588) internal successors, (4243835), 1058538 states have internal predecessors, (4243835), 0 states have call successors, (0), 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 17:27:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 17:27:33,847 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:33,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 17:27:33,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-12-02 17:27:33,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:33,847 INFO L85 PathProgramCache]: Analyzing trace with hash 669401, now seen corresponding path program 1 times [2023-12-02 17:27:33,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:33,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805759406] [2023-12-02 17:27:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:33,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:33,870 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 17:27:33,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:33,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805759406] [2023-12-02 17:27:33,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805759406] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:27:33,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:27:33,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 17:27:33,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456947318] [2023-12-02 17:27:33,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:27:33,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:27:33,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:33,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:27:33,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:27:35,426 INFO L87 Difference]: Start difference. First operand has 1058539 states, 919819 states have (on average 4.613771839894588) internal successors, (4243835), 1058538 states have internal predecessors, (4243835), 0 states have call successors, (0), 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 17:27:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:51,362 INFO L93 Difference]: Finished difference Result 1089538 states and 4241147 transitions. [2023-12-02 17:27:51,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:27:51,363 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 17:27:51,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:28:02,648 INFO L225 Difference]: With dead ends: 1089538 [2023-12-02 17:28:02,648 INFO L226 Difference]: Without dead ends: 1089538 [2023-12-02 17:28:02,648 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 17:28:02,649 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 136 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:28:02,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 63 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:28:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089538 states. [2023-12-02 17:28:40,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089538 to 841916. [2023-12-02 17:28:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841916 states, 781354 states have (on average 4.348631990109476) internal successors, (3397821), 841915 states have internal predecessors, (3397821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)