./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/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_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 504de2e820c504d0b98f5b71c19407f1b43c0dd9338639fad4f2fe6ea2f6854f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:53:48,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:53:49,034 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:53:49,038 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:53:49,039 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:53:49,063 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:53:49,064 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:53:49,064 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:53:49,065 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:53:49,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:53:49,066 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:53:49,067 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:53:49,067 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:53:49,068 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:53:49,068 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:53:49,069 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:53:49,069 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:53:49,070 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:53:49,070 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:53:49,071 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:53:49,071 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:53:49,072 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:53:49,073 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:53:49,074 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:53:49,074 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:53:49,075 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:53:49,075 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:53:49,075 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:53:49,076 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:53:49,076 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:53:49,077 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:53:49,077 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:53:49,077 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:53:49,078 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:53:49,078 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:53:49,078 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:53:49,079 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:53:49,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:53:49,079 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:53:49,079 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:53:49,080 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:53:49,080 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:53:49,080 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:53:49,080 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:53:49,081 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:53:49,081 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:53:49,081 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:53:49,081 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_104d3548-1ea1-4310-906e-a4534d00b842/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 504de2e820c504d0b98f5b71c19407f1b43c0dd9338639fad4f2fe6ea2f6854f [2023-12-02 17:53:49,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:53:49,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:53:49,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:53:49,311 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:53:49,311 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:53:49,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2023-12-02 17:53:52,089 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:53:52,282 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:53:52,282 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2023-12-02 17:53:52,291 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/data/47d7f2d9b/19d4f1738cde4df69cb8c41035e150fa/FLAG154936c1d [2023-12-02 17:53:52,303 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/data/47d7f2d9b/19d4f1738cde4df69cb8c41035e150fa [2023-12-02 17:53:52,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:53:52,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:53:52,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:53:52,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:53:52,314 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:53:52,315 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e54faed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52, skipping insertion in model container [2023-12-02 17:53:52,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,347 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:53:52,535 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/sv-benchmarks/c/weaver/parallel-barrier.wvr.c[4800,4813] [2023-12-02 17:53:52,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:53:52,551 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:53:52,583 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/sv-benchmarks/c/weaver/parallel-barrier.wvr.c[4800,4813] [2023-12-02 17:53:52,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:53:52,592 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:53:52,593 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:53:52,599 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:53:52,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52 WrapperNode [2023-12-02 17:53:52,599 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:53:52,600 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:53:52,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:53:52,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:53:52,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,616 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,645 INFO L138 Inliner]: procedures = 25, calls = 98, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 270 [2023-12-02 17:53:52,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:53:52,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:53:52,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:53:52,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:53:52,655 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,660 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,670 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,672 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:53:52,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:53:52,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:53:52,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:53:52,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (1/1) ... [2023-12-02 17:53:52,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:53:52,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:53:52,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:53:52,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_104d3548-1ea1-4310-906e-a4534d00b842/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:53:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:53:52,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:53:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:53:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:53:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-02 17:53:52,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-02 17:53:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-02 17:53:52,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-02 17:53:52,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-12-02 17:53:52,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-12-02 17:53:52,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-12-02 17:53:52,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-12-02 17:53:52,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:53:52,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-12-02 17:53:52,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-12-02 17:53:52,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-12-02 17:53:52,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-12-02 17:53:52,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 17:53:52,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 17:53:52,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:53:52,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:53:52,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:53:52,753 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 17:53:52,868 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:53:52,871 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:53:53,191 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:53:53,457 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:53:53,457 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 17:53:53,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:53:53 BoogieIcfgContainer [2023-12-02 17:53:53,457 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:53:53,460 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:53:53,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:53:53,464 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:53:53,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:53:52" (1/3) ... [2023-12-02 17:53:53,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b78663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:53:53, skipping insertion in model container [2023-12-02 17:53:53,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:53:52" (2/3) ... [2023-12-02 17:53:53,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b78663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:53:53, skipping insertion in model container [2023-12-02 17:53:53,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:53:53" (3/3) ... [2023-12-02 17:53:53,467 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2023-12-02 17:53:53,476 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-12-02 17:53:53,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:53:53,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:53:53,487 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 17:53:53,580 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-12-02 17:53:53,613 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 94 places, 79 transitions, 224 flow [2023-12-02 17:53:56,944 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 82421 states, 82420 states have (on average 4.948180053385101) internal successors, (407829), 82420 states have internal predecessors, (407829), 0 states have call successors, (0), 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 17:53:56,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:53:56,975 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@6d2ee3f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:53:56,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-12-02 17:53:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 82421 states, 82420 states have (on average 4.948180053385101) internal successors, (407829), 82420 states have internal predecessors, (407829), 0 states have call successors, (0), 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 17:53:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:53:57,766 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:53:57,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:53:57,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:53:57,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:53:57,773 INFO L85 PathProgramCache]: Analyzing trace with hash -867341299, now seen corresponding path program 1 times [2023-12-02 17:53:57,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:53:57,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130753233] [2023-12-02 17:53:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:53:57,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:53:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:53:58,186 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 17:53:58,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:53:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130753233] [2023-12-02 17:53:58,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130753233] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:53:58,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:53:58,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:53:58,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339255572] [2023-12-02 17:53:58,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:53:58,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:53:58,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:53:58,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:53:58,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:53:58,465 INFO L87 Difference]: Start difference. First operand has 82421 states, 82420 states have (on average 4.948180053385101) internal successors, (407829), 82420 states have internal predecessors, (407829), 0 states have call successors, (0), 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, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:53:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:53:59,532 INFO L93 Difference]: Finished difference Result 62933 states and 307645 transitions. [2023-12-02 17:53:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:53:59,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:53:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:54:00,233 INFO L225 Difference]: With dead ends: 62933 [2023-12-02 17:54:00,233 INFO L226 Difference]: Without dead ends: 62933 [2023-12-02 17:54:00,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:54:00,238 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 36 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:54:00,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 58 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:54:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62933 states. [2023-12-02 17:54:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62933 to 62933. [2023-12-02 17:54:03,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62933 states, 62932 states have (on average 4.8885304773406215) internal successors, (307645), 62932 states have internal predecessors, (307645), 0 states have call successors, (0), 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 17:54:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62933 states to 62933 states and 307645 transitions. [2023-12-02 17:54:03,448 INFO L78 Accepts]: Start accepts. Automaton has 62933 states and 307645 transitions. Word has length 60 [2023-12-02 17:54:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:54:03,448 INFO L495 AbstractCegarLoop]: Abstraction has 62933 states and 307645 transitions. [2023-12-02 17:54:03,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 62933 states and 307645 transitions. [2023-12-02 17:54:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:54:03,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:54:03,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:54:03,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:54:03,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:54:03,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:54:03,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1544570937, now seen corresponding path program 2 times [2023-12-02 17:54:03,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:54:03,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326929358] [2023-12-02 17:54:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:54:03,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:54:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:54:04,109 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 17:54:04,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:54:04,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326929358] [2023-12-02 17:54:04,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326929358] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:54:04,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:54:04,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:54:04,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096999943] [2023-12-02 17:54:04,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:54:04,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:54:04,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:54:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:54:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:54:04,114 INFO L87 Difference]: Start difference. First operand 62933 states and 307645 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:54:04,920 INFO L93 Difference]: Finished difference Result 53013 states and 256413 transitions. [2023-12-02 17:54:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:54:04,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:54:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:54:05,341 INFO L225 Difference]: With dead ends: 53013 [2023-12-02 17:54:05,341 INFO L226 Difference]: Without dead ends: 53013 [2023-12-02 17:54:05,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:54:05,343 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:54:05,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 58 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:54:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53013 states. [2023-12-02 17:54:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53013 to 53013. [2023-12-02 17:54:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53013 states, 53012 states have (on average 4.836885988078171) internal successors, (256413), 53012 states have internal predecessors, (256413), 0 states have call successors, (0), 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 17:54:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53013 states to 53013 states and 256413 transitions. [2023-12-02 17:54:07,428 INFO L78 Accepts]: Start accepts. Automaton has 53013 states and 256413 transitions. Word has length 60 [2023-12-02 17:54:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:54:07,429 INFO L495 AbstractCegarLoop]: Abstraction has 53013 states and 256413 transitions. [2023-12-02 17:54:07,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 53013 states and 256413 transitions. [2023-12-02 17:54:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:54:07,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:54:07,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:54:07,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:54:07,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:54:07,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:54:07,555 INFO L85 PathProgramCache]: Analyzing trace with hash 959353723, now seen corresponding path program 3 times [2023-12-02 17:54:07,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:54:07,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131078098] [2023-12-02 17:54:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:54:07,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:54:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:54:09,004 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 17:54:09,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:54:09,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131078098] [2023-12-02 17:54:09,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131078098] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:54:09,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:54:09,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:54:09,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451868853] [2023-12-02 17:54:09,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:54:09,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:54:09,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:54:09,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:54:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:54:09,007 INFO L87 Difference]: Start difference. First operand 53013 states and 256413 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:54:13,027 INFO L93 Difference]: Finished difference Result 64462 states and 312122 transitions. [2023-12-02 17:54:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 17:54:13,027 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:54:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:54:13,353 INFO L225 Difference]: With dead ends: 64462 [2023-12-02 17:54:13,353 INFO L226 Difference]: Without dead ends: 63321 [2023-12-02 17:54:13,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 17:54:13,355 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 614 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 5678 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 5690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:54:13,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 1088 Invalid, 5690 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [12 Valid, 5678 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 17:54:13,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63321 states. [2023-12-02 17:54:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63321 to 55561. [2023-12-02 17:54:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55561 states, 55560 states have (on average 4.824172066234701) internal successors, (268031), 55560 states have internal predecessors, (268031), 0 states have call successors, (0), 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 17:54:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55561 states to 55561 states and 268031 transitions. [2023-12-02 17:54:15,644 INFO L78 Accepts]: Start accepts. Automaton has 55561 states and 268031 transitions. Word has length 60 [2023-12-02 17:54:15,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:54:15,645 INFO L495 AbstractCegarLoop]: Abstraction has 55561 states and 268031 transitions. [2023-12-02 17:54:15,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 55561 states and 268031 transitions. [2023-12-02 17:54:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:54:15,786 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:54:15,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:54:15,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:54:15,786 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:54:15,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:54:15,787 INFO L85 PathProgramCache]: Analyzing trace with hash -708519623, now seen corresponding path program 4 times [2023-12-02 17:54:15,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:54:15,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970344257] [2023-12-02 17:54:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:54:15,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:54:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:54:16,896 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 17:54:16,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:54:16,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970344257] [2023-12-02 17:54:16,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970344257] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:54:16,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:54:16,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:54:16,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357279435] [2023-12-02 17:54:16,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:54:16,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:54:16,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:54:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:54:16,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:54:16,899 INFO L87 Difference]: Start difference. First operand 55561 states and 268031 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:54:20,302 INFO L93 Difference]: Finished difference Result 66109 states and 320427 transitions. [2023-12-02 17:54:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-02 17:54:20,303 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:54:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:54:20,738 INFO L225 Difference]: With dead ends: 66109 [2023-12-02 17:54:20,738 INFO L226 Difference]: Without dead ends: 65508 [2023-12-02 17:54:20,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:54:20,741 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 746 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 5409 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 5409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:54:20,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 1087 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 5409 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 17:54:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65508 states. [2023-12-02 17:54:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65508 to 55621. [2023-12-02 17:54:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55621 states, 55620 states have (on average 4.822815533980583) internal successors, (268245), 55620 states have internal predecessors, (268245), 0 states have call successors, (0), 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 17:54:23,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55621 states to 55621 states and 268245 transitions. [2023-12-02 17:54:23,049 INFO L78 Accepts]: Start accepts. Automaton has 55621 states and 268245 transitions. Word has length 60 [2023-12-02 17:54:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:54:23,050 INFO L495 AbstractCegarLoop]: Abstraction has 55621 states and 268245 transitions. [2023-12-02 17:54:23,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 55621 states and 268245 transitions. [2023-12-02 17:54:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:54:23,191 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:54:23,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:54:23,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:54:23,192 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:54:23,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:54:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1619610671, now seen corresponding path program 5 times [2023-12-02 17:54:23,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:54:23,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431794306] [2023-12-02 17:54:23,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:54:23,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:54:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:54:24,289 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 17:54:24,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:54:24,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431794306] [2023-12-02 17:54:24,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431794306] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:54:24,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:54:24,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:54:24,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846997021] [2023-12-02 17:54:24,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:54:24,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:54:24,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:54:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:54:24,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:54:24,292 INFO L87 Difference]: Start difference. First operand 55621 states and 268245 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:54:27,452 INFO L93 Difference]: Finished difference Result 68394 states and 331840 transitions. [2023-12-02 17:54:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 17:54:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:54:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:54:27,797 INFO L225 Difference]: With dead ends: 68394 [2023-12-02 17:54:27,797 INFO L226 Difference]: Without dead ends: 67613 [2023-12-02 17:54:27,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 17:54:27,799 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 668 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 5635 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 5648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 5635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:54:27,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 1140 Invalid, 5648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 5635 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 17:54:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67613 states. [2023-12-02 17:54:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67613 to 57293. [2023-12-02 17:54:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57293 states, 57292 states have (on average 4.811788731411017) internal successors, (275677), 57292 states have internal predecessors, (275677), 0 states have call successors, (0), 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 17:54:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57293 states to 57293 states and 275677 transitions. [2023-12-02 17:54:30,148 INFO L78 Accepts]: Start accepts. Automaton has 57293 states and 275677 transitions. Word has length 60 [2023-12-02 17:54:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:54:30,149 INFO L495 AbstractCegarLoop]: Abstraction has 57293 states and 275677 transitions. [2023-12-02 17:54:30,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 57293 states and 275677 transitions. [2023-12-02 17:54:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:54:30,293 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:54:30,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:54:30,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:54:30,293 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:54:30,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:54:30,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1278527461, now seen corresponding path program 6 times [2023-12-02 17:54:30,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:54:30,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441195953] [2023-12-02 17:54:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:54:30,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:54:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:54:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:54:31,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:54:31,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441195953] [2023-12-02 17:54:31,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441195953] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:54:31,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:54:31,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:54:31,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389398722] [2023-12-02 17:54:31,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:54:31,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:54:31,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:54:31,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:54:31,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:54:31,067 INFO L87 Difference]: Start difference. First operand 57293 states and 275677 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:54:34,178 INFO L93 Difference]: Finished difference Result 70281 states and 340813 transitions. [2023-12-02 17:54:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 17:54:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:54:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:54:34,698 INFO L225 Difference]: With dead ends: 70281 [2023-12-02 17:54:34,698 INFO L226 Difference]: Without dead ends: 69680 [2023-12-02 17:54:34,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:54:34,700 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 750 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 5644 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 5658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:54:34,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1078 Invalid, 5658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 5644 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 17:54:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69680 states. [2023-12-02 17:54:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69680 to 57413. [2023-12-02 17:54:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57413 states, 57412 states have (on average 4.811276388211524) internal successors, (276225), 57412 states have internal predecessors, (276225), 0 states have call successors, (0), 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 17:54:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57413 states to 57413 states and 276225 transitions. [2023-12-02 17:54:36,736 INFO L78 Accepts]: Start accepts. Automaton has 57413 states and 276225 transitions. Word has length 60 [2023-12-02 17:54:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:54:36,737 INFO L495 AbstractCegarLoop]: Abstraction has 57413 states and 276225 transitions. [2023-12-02 17:54:36,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 57413 states and 276225 transitions. [2023-12-02 17:54:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:54:36,878 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:54:36,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:54:36,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:54:36,878 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:54:36,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:54:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2105348787, now seen corresponding path program 7 times [2023-12-02 17:54:36,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:54:36,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196235493] [2023-12-02 17:54:36,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:54:36,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:54:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:54:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:54:38,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:54:38,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196235493] [2023-12-02 17:54:38,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196235493] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:54:38,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:54:38,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:54:38,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875274377] [2023-12-02 17:54:38,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:54:38,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:54:38,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:54:38,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:54:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:54:38,066 INFO L87 Difference]: Start difference. First operand 57413 states and 276225 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:54:41,398 INFO L93 Difference]: Finished difference Result 71533 states and 347299 transitions. [2023-12-02 17:54:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 17:54:41,399 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:54:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:54:41,675 INFO L225 Difference]: With dead ends: 71533 [2023-12-02 17:54:41,675 INFO L226 Difference]: Without dead ends: 70932 [2023-12-02 17:54:41,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:54:41,677 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 800 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 5800 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 5813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 5800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:54:41,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 1103 Invalid, 5813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 5800 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 17:54:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70932 states. [2023-12-02 17:54:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70932 to 57533. [2023-12-02 17:54:43,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57533 states, 57532 states have (on average 4.809723284433011) internal successors, (276713), 57532 states have internal predecessors, (276713), 0 states have call successors, (0), 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 17:54:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57533 states to 57533 states and 276713 transitions. [2023-12-02 17:54:44,008 INFO L78 Accepts]: Start accepts. Automaton has 57533 states and 276713 transitions. Word has length 60 [2023-12-02 17:54:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:54:44,008 INFO L495 AbstractCegarLoop]: Abstraction has 57533 states and 276713 transitions. [2023-12-02 17:54:44,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 57533 states and 276713 transitions. [2023-12-02 17:54:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:54:44,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:54:44,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:54:44,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 17:54:44,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:54:44,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:54:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2035180991, now seen corresponding path program 8 times [2023-12-02 17:54:44,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:54:44,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244597797] [2023-12-02 17:54:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:54:44,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:54:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:54:44,937 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 17:54:44,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:54:44,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244597797] [2023-12-02 17:54:44,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244597797] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:54:44,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:54:44,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:54:44,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694855694] [2023-12-02 17:54:44,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:54:44,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:54:44,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:54:44,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:54:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:54:44,940 INFO L87 Difference]: Start difference. First operand 57533 states and 276713 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:54:47,567 INFO L93 Difference]: Finished difference Result 61890 states and 297728 transitions. [2023-12-02 17:54:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 17:54:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:54:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:54:47,809 INFO L225 Difference]: With dead ends: 61890 [2023-12-02 17:54:47,809 INFO L226 Difference]: Without dead ends: 60149 [2023-12-02 17:54:47,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:54:47,811 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 524 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 4835 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 4842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:54:47,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 841 Invalid, 4842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4835 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:54:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60149 states. [2023-12-02 17:54:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60149 to 56573. [2023-12-02 17:54:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56573 states, 56572 states have (on average 4.821201300996959) internal successors, (272745), 56572 states have internal predecessors, (272745), 0 states have call successors, (0), 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 17:54:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56573 states to 56573 states and 272745 transitions. [2023-12-02 17:54:49,984 INFO L78 Accepts]: Start accepts. Automaton has 56573 states and 272745 transitions. Word has length 60 [2023-12-02 17:54:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:54:49,985 INFO L495 AbstractCegarLoop]: Abstraction has 56573 states and 272745 transitions. [2023-12-02 17:54:49,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 56573 states and 272745 transitions. [2023-12-02 17:54:50,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:54:50,126 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:54:50,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:54:50,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 17:54:50,127 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:54:50,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:54:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -712181927, now seen corresponding path program 9 times [2023-12-02 17:54:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:54:50,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447022402] [2023-12-02 17:54:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:54:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:54:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:54:51,106 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 17:54:51,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:54:51,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447022402] [2023-12-02 17:54:51,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447022402] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:54:51,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:54:51,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:54:51,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668855804] [2023-12-02 17:54:51,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:54:51,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:54:51,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:54:51,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:54:51,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:54:51,108 INFO L87 Difference]: Start difference. First operand 56573 states and 272745 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:54:55,025 INFO L93 Difference]: Finished difference Result 76892 states and 369408 transitions. [2023-12-02 17:54:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-02 17:54:55,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:54:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:54:55,378 INFO L225 Difference]: With dead ends: 76892 [2023-12-02 17:54:55,378 INFO L226 Difference]: Without dead ends: 76291 [2023-12-02 17:54:55,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=357, Invalid=3065, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:54:55,380 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 925 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 6855 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 6875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 6855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:54:55,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [925 Valid, 1422 Invalid, 6875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 6855 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 17:54:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76291 states. [2023-12-02 17:54:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76291 to 58349. [2023-12-02 17:54:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58349 states, 58348 states have (on average 4.817045999862891) internal successors, (281065), 58348 states have internal predecessors, (281065), 0 states have call successors, (0), 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 17:54:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58349 states to 58349 states and 281065 transitions. [2023-12-02 17:54:57,828 INFO L78 Accepts]: Start accepts. Automaton has 58349 states and 281065 transitions. Word has length 60 [2023-12-02 17:54:57,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:54:57,828 INFO L495 AbstractCegarLoop]: Abstraction has 58349 states and 281065 transitions. [2023-12-02 17:54:57,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:54:57,828 INFO L276 IsEmpty]: Start isEmpty. Operand 58349 states and 281065 transitions. [2023-12-02 17:54:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:54:58,009 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:54:58,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:54:58,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:54:58,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:54:58,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:54:58,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1295952955, now seen corresponding path program 10 times [2023-12-02 17:54:58,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:54:58,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601597833] [2023-12-02 17:54:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:54:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:54:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:54:58,591 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 17:54:58,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:54:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601597833] [2023-12-02 17:54:58,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601597833] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:54:58,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:54:58,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:54:58,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473586516] [2023-12-02 17:54:58,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:54:58,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:54:58,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:54:58,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:54:58,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:54:58,594 INFO L87 Difference]: Start difference. First operand 58349 states and 281065 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:55:02,347 INFO L93 Difference]: Finished difference Result 73553 states and 354765 transitions. [2023-12-02 17:55:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-02 17:55:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:55:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:55:02,624 INFO L225 Difference]: With dead ends: 73553 [2023-12-02 17:55:02,624 INFO L226 Difference]: Without dead ends: 72972 [2023-12-02 17:55:02,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 17:55:02,625 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 834 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 6338 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 6356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:55:02,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1233 Invalid, 6356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 6338 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 17:55:03,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72972 states. [2023-12-02 17:55:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72972 to 58861. [2023-12-02 17:55:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58861 states, 58860 states have (on average 4.815919130139314) internal successors, (283465), 58860 states have internal predecessors, (283465), 0 states have call successors, (0), 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 17:55:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58861 states to 58861 states and 283465 transitions. [2023-12-02 17:55:04,859 INFO L78 Accepts]: Start accepts. Automaton has 58861 states and 283465 transitions. Word has length 60 [2023-12-02 17:55:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:55:04,859 INFO L495 AbstractCegarLoop]: Abstraction has 58861 states and 283465 transitions. [2023-12-02 17:55:04,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 58861 states and 283465 transitions. [2023-12-02 17:55:05,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:55:05,007 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:55:05,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:55:05,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 17:55:05,007 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:55:05,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:55:05,008 INFO L85 PathProgramCache]: Analyzing trace with hash -557939815, now seen corresponding path program 11 times [2023-12-02 17:55:05,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:55:05,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904217969] [2023-12-02 17:55:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:55:05,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:55:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:55:06,054 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 17:55:06,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:55:06,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904217969] [2023-12-02 17:55:06,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904217969] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:55:06,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:55:06,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:55:06,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012958633] [2023-12-02 17:55:06,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:55:06,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:55:06,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:55:06,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:55:06,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:55:06,057 INFO L87 Difference]: Start difference. First operand 58861 states and 283465 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:55:09,897 INFO L93 Difference]: Finished difference Result 75346 states and 362088 transitions. [2023-12-02 17:55:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-02 17:55:09,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:55:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:55:10,194 INFO L225 Difference]: With dead ends: 75346 [2023-12-02 17:55:10,194 INFO L226 Difference]: Without dead ends: 74061 [2023-12-02 17:55:10,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=3282, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 17:55:10,196 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 919 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 6184 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 6203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 6184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:55:10,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 1230 Invalid, 6203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 6184 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 17:55:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74061 states. [2023-12-02 17:55:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74061 to 58717. [2023-12-02 17:55:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58717 states, 58716 states have (on average 4.813832686150283) internal successors, (282649), 58716 states have internal predecessors, (282649), 0 states have call successors, (0), 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 17:55:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58717 states to 58717 states and 282649 transitions. [2023-12-02 17:55:12,514 INFO L78 Accepts]: Start accepts. Automaton has 58717 states and 282649 transitions. Word has length 60 [2023-12-02 17:55:12,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:55:12,514 INFO L495 AbstractCegarLoop]: Abstraction has 58717 states and 282649 transitions. [2023-12-02 17:55:12,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 58717 states and 282649 transitions. [2023-12-02 17:55:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:55:12,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:55:12,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:55:12,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 17:55:12,656 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:55:12,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:55:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash -120021225, now seen corresponding path program 12 times [2023-12-02 17:55:12,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:55:12,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931724581] [2023-12-02 17:55:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:55:12,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:55:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:55:13,366 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 17:55:13,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:55:13,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931724581] [2023-12-02 17:55:13,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931724581] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:55:13,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:55:13,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:55:13,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2596507] [2023-12-02 17:55:13,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:55:13,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:55:13,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:55:13,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:55:13,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:55:13,368 INFO L87 Difference]: Start difference. First operand 58717 states and 282649 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:55:17,519 INFO L93 Difference]: Finished difference Result 81463 states and 391259 transitions. [2023-12-02 17:55:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-02 17:55:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:55:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:55:17,868 INFO L225 Difference]: With dead ends: 81463 [2023-12-02 17:55:17,868 INFO L226 Difference]: Without dead ends: 80862 [2023-12-02 17:55:17,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=397, Invalid=3509, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 17:55:17,870 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 1072 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 6264 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 6287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 6264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:55:17,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1072 Valid, 1338 Invalid, 6287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 6264 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 17:55:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80862 states. [2023-12-02 17:55:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80862 to 58733. [2023-12-02 17:55:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58733 states, 58732 states have (on average 4.8138834025744055) internal successors, (282729), 58732 states have internal predecessors, (282729), 0 states have call successors, (0), 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 17:55:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58733 states to 58733 states and 282729 transitions. [2023-12-02 17:55:20,404 INFO L78 Accepts]: Start accepts. Automaton has 58733 states and 282729 transitions. Word has length 60 [2023-12-02 17:55:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:55:20,404 INFO L495 AbstractCegarLoop]: Abstraction has 58733 states and 282729 transitions. [2023-12-02 17:55:20,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 58733 states and 282729 transitions. [2023-12-02 17:55:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:55:20,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:55:20,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:55:20,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 17:55:20,560 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:55:20,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:55:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1888113657, now seen corresponding path program 13 times [2023-12-02 17:55:20,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:55:20,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341900686] [2023-12-02 17:55:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:55:20,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:55:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:55:21,487 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 17:55:21,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:55:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341900686] [2023-12-02 17:55:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341900686] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:55:21,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:55:21,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:55:21,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786861388] [2023-12-02 17:55:21,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:55:21,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:55:21,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:55:21,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:55:21,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:55:21,490 INFO L87 Difference]: Start difference. First operand 58733 states and 282729 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:25,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:55:25,319 INFO L93 Difference]: Finished difference Result 78407 states and 377515 transitions. [2023-12-02 17:55:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-02 17:55:25,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:55:25,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:55:25,769 INFO L225 Difference]: With dead ends: 78407 [2023-12-02 17:55:25,769 INFO L226 Difference]: Without dead ends: 77826 [2023-12-02 17:55:25,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=3192, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 17:55:25,771 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1025 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 6180 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 6203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 6180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:55:25,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 1293 Invalid, 6203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 6180 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 17:55:25,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77826 states. [2023-12-02 17:55:27,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77826 to 58749. [2023-12-02 17:55:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58749 states, 58748 states have (on average 4.813661741676312) internal successors, (282793), 58748 states have internal predecessors, (282793), 0 states have call successors, (0), 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 17:55:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58749 states to 58749 states and 282793 transitions. [2023-12-02 17:55:27,866 INFO L78 Accepts]: Start accepts. Automaton has 58749 states and 282793 transitions. Word has length 60 [2023-12-02 17:55:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:55:27,866 INFO L495 AbstractCegarLoop]: Abstraction has 58749 states and 282793 transitions. [2023-12-02 17:55:27,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 58749 states and 282793 transitions. [2023-12-02 17:55:28,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:55:28,423 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:55:28,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:55:28,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 17:55:28,424 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:55:28,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:55:28,425 INFO L85 PathProgramCache]: Analyzing trace with hash -486245841, now seen corresponding path program 14 times [2023-12-02 17:55:28,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:55:28,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857896440] [2023-12-02 17:55:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:55:28,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:55:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:55:29,082 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 17:55:29,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:55:29,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857896440] [2023-12-02 17:55:29,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857896440] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:55:29,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:55:29,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:55:29,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428068948] [2023-12-02 17:55:29,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:55:29,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:55:29,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:55:29,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:55:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:55:29,085 INFO L87 Difference]: Start difference. First operand 58749 states and 282793 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:55:33,687 INFO L93 Difference]: Finished difference Result 80847 states and 389279 transitions. [2023-12-02 17:55:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-02 17:55:33,688 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:55:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:55:34,030 INFO L225 Difference]: With dead ends: 80847 [2023-12-02 17:55:34,030 INFO L226 Difference]: Without dead ends: 80246 [2023-12-02 17:55:34,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=511, Invalid=4745, Unknown=0, NotChecked=0, Total=5256 [2023-12-02 17:55:34,033 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 1010 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 7471 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 7494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 7471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:55:34,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 1579 Invalid, 7494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 7471 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 17:55:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80246 states. [2023-12-02 17:55:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80246 to 58749. [2023-12-02 17:55:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58749 states, 58748 states have (on average 4.813661741676312) internal successors, (282793), 58748 states have internal predecessors, (282793), 0 states have call successors, (0), 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 17:55:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58749 states to 58749 states and 282793 transitions. [2023-12-02 17:55:36,696 INFO L78 Accepts]: Start accepts. Automaton has 58749 states and 282793 transitions. Word has length 60 [2023-12-02 17:55:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:55:36,696 INFO L495 AbstractCegarLoop]: Abstraction has 58749 states and 282793 transitions. [2023-12-02 17:55:36,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 58749 states and 282793 transitions. [2023-12-02 17:55:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:55:36,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:55:36,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:55:36,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 17:55:36,873 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:55:36,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:55:36,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1847329943, now seen corresponding path program 15 times [2023-12-02 17:55:36,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:55:36,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943561658] [2023-12-02 17:55:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:55:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:55:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:55:37,372 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 17:55:37,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:55:37,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943561658] [2023-12-02 17:55:37,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943561658] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:55:37,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:55:37,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:55:37,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736584559] [2023-12-02 17:55:37,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:55:37,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:55:37,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:55:37,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:55:37,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:55:37,374 INFO L87 Difference]: Start difference. First operand 58749 states and 282793 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:55:42,764 INFO L93 Difference]: Finished difference Result 77248 states and 372538 transitions. [2023-12-02 17:55:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 17:55:42,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:55:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:55:43,175 INFO L225 Difference]: With dead ends: 77248 [2023-12-02 17:55:43,175 INFO L226 Difference]: Without dead ends: 76647 [2023-12-02 17:55:43,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=440, Invalid=4252, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 17:55:43,178 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 940 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 7916 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 7938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 7916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:55:43,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 1663 Invalid, 7938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 7916 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-02 17:55:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76647 states. [2023-12-02 17:55:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76647 to 58749. [2023-12-02 17:55:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58749 states, 58748 states have (on average 4.813389391979301) internal successors, (282777), 58748 states have internal predecessors, (282777), 0 states have call successors, (0), 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 17:55:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58749 states to 58749 states and 282777 transitions. [2023-12-02 17:55:45,595 INFO L78 Accepts]: Start accepts. Automaton has 58749 states and 282777 transitions. Word has length 60 [2023-12-02 17:55:45,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:55:45,595 INFO L495 AbstractCegarLoop]: Abstraction has 58749 states and 282777 transitions. [2023-12-02 17:55:45,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 58749 states and 282777 transitions. [2023-12-02 17:55:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:55:46,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:55:46,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:55:46,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 17:55:46,161 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:55:46,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:55:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1214518929, now seen corresponding path program 16 times [2023-12-02 17:55:46,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:55:46,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082620443] [2023-12-02 17:55:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:55:46,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:55:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:55:46,706 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 17:55:46,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:55:46,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082620443] [2023-12-02 17:55:46,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082620443] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:55:46,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:55:46,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:55:46,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320709918] [2023-12-02 17:55:46,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:55:46,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:55:46,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:55:46,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:55:46,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:55:46,708 INFO L87 Difference]: Start difference. First operand 58749 states and 282777 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:55:50,467 INFO L93 Difference]: Finished difference Result 76332 states and 367356 transitions. [2023-12-02 17:55:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 17:55:50,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:55:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:55:50,736 INFO L225 Difference]: With dead ends: 76332 [2023-12-02 17:55:50,736 INFO L226 Difference]: Without dead ends: 75799 [2023-12-02 17:55:50,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=2869, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 17:55:50,738 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 818 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 6922 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 6942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 6922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:55:50,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 1374 Invalid, 6942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 6922 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 17:55:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75799 states. [2023-12-02 17:55:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75799 to 58781. [2023-12-02 17:55:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58781 states, 58780 states have (on average 4.81267437904049) internal successors, (282889), 58780 states have internal predecessors, (282889), 0 states have call successors, (0), 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 17:55:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58781 states to 58781 states and 282889 transitions. [2023-12-02 17:55:53,010 INFO L78 Accepts]: Start accepts. Automaton has 58781 states and 282889 transitions. Word has length 60 [2023-12-02 17:55:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:55:53,010 INFO L495 AbstractCegarLoop]: Abstraction has 58781 states and 282889 transitions. [2023-12-02 17:55:53,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 58781 states and 282889 transitions. [2023-12-02 17:55:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:55:53,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:55:53,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:55:53,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 17:55:53,142 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:55:53,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:55:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1706788743, now seen corresponding path program 17 times [2023-12-02 17:55:53,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:55:53,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499394665] [2023-12-02 17:55:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:55:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:55:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:55:53,625 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 17:55:53,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:55:53,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499394665] [2023-12-02 17:55:53,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499394665] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:55:53,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:55:53,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:55:53,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390483650] [2023-12-02 17:55:53,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:55:53,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:55:53,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:55:53,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:55:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:55:53,627 INFO L87 Difference]: Start difference. First operand 58781 states and 282889 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:55:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:55:57,454 INFO L93 Difference]: Finished difference Result 75917 states and 365787 transitions. [2023-12-02 17:55:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 17:55:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:55:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:55:57,767 INFO L225 Difference]: With dead ends: 75917 [2023-12-02 17:55:57,767 INFO L226 Difference]: Without dead ends: 75328 [2023-12-02 17:55:57,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=2869, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 17:55:57,768 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 850 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 6438 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 6458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 6438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:55:57,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 1309 Invalid, 6458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 6438 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 17:55:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75328 states. [2023-12-02 17:55:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75328 to 58733. [2023-12-02 17:55:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58733 states, 58732 states have (on average 4.8136109786828305) internal successors, (282713), 58732 states have internal predecessors, (282713), 0 states have call successors, (0), 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 17:56:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58733 states to 58733 states and 282713 transitions. [2023-12-02 17:56:00,008 INFO L78 Accepts]: Start accepts. Automaton has 58733 states and 282713 transitions. Word has length 60 [2023-12-02 17:56:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:56:00,008 INFO L495 AbstractCegarLoop]: Abstraction has 58733 states and 282713 transitions. [2023-12-02 17:56:00,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:56:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 58733 states and 282713 transitions. [2023-12-02 17:56:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:56:00,131 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:56:00,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:56:00,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 17:56:00,132 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:56:00,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:56:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1074469719, now seen corresponding path program 18 times [2023-12-02 17:56:00,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:56:00,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224801220] [2023-12-02 17:56:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:56:00,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:56:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:56:00,584 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 17:56:00,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:56:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224801220] [2023-12-02 17:56:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224801220] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:56:00,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:56:00,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:56:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981240118] [2023-12-02 17:56:00,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:56:00,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:56:00,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:56:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:56:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:56:00,585 INFO L87 Difference]: Start difference. First operand 58733 states and 282713 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:56:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:56:04,716 INFO L93 Difference]: Finished difference Result 75666 states and 363752 transitions. [2023-12-02 17:56:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-02 17:56:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:56:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:56:05,282 INFO L225 Difference]: With dead ends: 75666 [2023-12-02 17:56:05,282 INFO L226 Difference]: Without dead ends: 74525 [2023-12-02 17:56:05,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=490, Invalid=4622, Unknown=0, NotChecked=0, Total=5112 [2023-12-02 17:56:05,284 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 914 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 6899 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 6919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 6899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:56:05,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 1392 Invalid, 6919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 6899 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 17:56:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74525 states. [2023-12-02 17:56:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74525 to 58913. [2023-12-02 17:56:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58913 states, 58912 states have (on average 4.8098010592069524) internal successors, (283355), 58912 states have internal predecessors, (283355), 0 states have call successors, (0), 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 17:56:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58913 states to 58913 states and 283355 transitions. [2023-12-02 17:56:07,239 INFO L78 Accepts]: Start accepts. Automaton has 58913 states and 283355 transitions. Word has length 60 [2023-12-02 17:56:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:56:07,239 INFO L495 AbstractCegarLoop]: Abstraction has 58913 states and 283355 transitions. [2023-12-02 17:56:07,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:56:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 58913 states and 283355 transitions. [2023-12-02 17:56:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:56:07,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:56:07,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:56:07,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 17:56:07,388 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:56:07,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:56:07,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1542068625, now seen corresponding path program 19 times [2023-12-02 17:56:07,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:56:07,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620790238] [2023-12-02 17:56:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:56:07,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:56:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:56:08,391 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 17:56:08,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:56:08,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620790238] [2023-12-02 17:56:08,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620790238] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:56:08,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:56:08,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:56:08,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174752206] [2023-12-02 17:56:08,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:56:08,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:56:08,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:56:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:56:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:56:08,393 INFO L87 Difference]: Start difference. First operand 58913 states and 283355 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:56:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:56:12,804 INFO L93 Difference]: Finished difference Result 77101 states and 371151 transitions. [2023-12-02 17:56:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-02 17:56:12,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-12-02 17:56:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:56:13,079 INFO L225 Difference]: With dead ends: 77101 [2023-12-02 17:56:13,079 INFO L226 Difference]: Without dead ends: 76500 [2023-12-02 17:56:13,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=483, Invalid=4487, Unknown=0, NotChecked=0, Total=4970 [2023-12-02 17:56:13,081 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 930 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 7202 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 7225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 7202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:56:13,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1533 Invalid, 7225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 7202 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-02 17:56:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76500 states. [2023-12-02 17:56:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76500 to 58733. [2023-12-02 17:56:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58733 states, 58732 states have (on average 4.8136109786828305) internal successors, (282713), 58732 states have internal predecessors, (282713), 0 states have call successors, (0), 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 17:56:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58733 states to 58733 states and 282713 transitions. [2023-12-02 17:56:15,253 INFO L78 Accepts]: Start accepts. Automaton has 58733 states and 282713 transitions. Word has length 60 [2023-12-02 17:56:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:56:15,254 INFO L495 AbstractCegarLoop]: Abstraction has 58733 states and 282713 transitions. [2023-12-02 17:56:15,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 17:56:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 58733 states and 282713 transitions. [2023-12-02 17:56:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:56:15,393 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:56:15,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:56:15,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 17:56:15,394 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-12-02 17:56:15,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:56:15,394 INFO L85 PathProgramCache]: Analyzing trace with hash 791507159, now seen corresponding path program 20 times [2023-12-02 17:56:15,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:56:15,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755200102] [2023-12-02 17:56:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:56:15,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:56:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:56:15,872 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 17:56:15,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:56:15,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755200102] [2023-12-02 17:56:15,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755200102] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:56:15,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:56:15,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:56:15,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306056803] [2023-12-02 17:56:15,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:56:15,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:56:15,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:56:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:56:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:56:15,874 INFO L87 Difference]: Start difference. First operand 58733 states and 282713 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)